CAD Project Files

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CAD Project Files

./20ma-connections: Diagram of the 20ma connections in 8i, 8L.

20ma: is a schematic of the various parts and their connections.
4915dec: is a drawing of DEC's 4915.
4915: is a more modern board similar to DEC's 4915.

./20ma-rs232: Board for TTY adapter box

loop-rs232: is a board to convert current loop to RS-232. It probably won't drive a TTY, though, as the loops are too low voltage.

./32k-8i: PDP-8/i Core replacement.

sboardnew: is an SRAM core replacement that uses simple paddle cards to hook into a PDP-8/i or PDP-12.

./32k-Omnibus: Omnibus 32K SRAM board

28wide: is an adapter to use wide or narrow SRAM chips.
legenda: is a board which brings every Omnibus signal to labelled pad.
Lafferty1: is a drawing based on Steve Lafferty's prototype.
Lafferty1ab: is an "as built" version of Lafferty1, with the changes incorporated in the group buy.
Lafferty2: is a drawing with ideas about a follow-on to Lafferty1.
legenda.brd: is a board that brings each Omnibus signal to a pad.
msc3102: is a drawing of the MSC3102 design.
OmnibusB: is a thought experiment about a larger SRAM.
Omnimem: is a simplified version using 74244 instead of 74125.
Roland: is a drawing of Roland's boot loader card.
Roland+mem1: is a combination of the Lafferty memory design and Roland's bootloader.
Roland+mem2: is a minor revision of Roland+mem1.
Roland+mem3: is a revision to fix noise problems.
Roland+memfram: is a revision to fix noise problems, and also to supports FRAM.
Roland+memser: adds a CPLD, which can be a serial or a memory controller..
Roland+memser2308: fixes the orientation of switch S1.
rtc: is a version of Lafferty1 with some thoughts about adding a clock circuit.

./BusCon: Bus Connector paddles for Negibus and Posibus

8j-merge: is a merge of the 34-pin and 40-pin paddles.
8j-merge2: is a merge of the 34-pin and 40-pin paddles, with various extras to make various cable ends.
BusConOld: is an early version based on the work of Charles Morris.
BusCon40: is an early incompatible version with better ground planes than BusConOld.
PosiBus: is a wacky idea with a molex connector.
BusCon: uses two 34-wire cables to carry Posibus, or just one for Negibus.
BusConPoly: is BusCon with Polygon fill.
tester: is another attempt at a backplane probe.
x-talk: is an attempt at a crosstalk measurement jig for Posibus cables.
BC08J: is essentially a BC08J paddle with a cheaper ribbon connector.
merge4: is four 8j-merge paddles on a single board.
Doug: is a Posibus/Negibus paddle using parts from Warren by way of Doug.

./BusStop: Bus Interconnect for Posibus

busstop: is a simple rack terminus for Posibus.

./ConsoleEmu: Project with Henk Gooijen.

core+io1: is an early draft of a 6802 CPU core and some I/O latches (to drive lights from SIMH).
core+io2: is an early draft of the 6802+I/O board.
core+io3: is the 6802 board again, experimenting with form-factor and component placement.
core+io4: the bigger 6802 version again, with bypass caps added.
core1: splitting the 6802 board up -- this is the CPU core.
io1: splitting the 6802 board up -- this is the I/O stuff.
core+io5: another version of the combined core+io 6802 board.
core2: a newer version of core1.
io2: a newer version of io1.
core+io: is the last version of core+io.
io-ok: is a snapshot of the I/O board before io3.
io3: everything rearranged to get another pair of LS373 in.
core3: is a version of the core board that matches io3.
io-ol: is io3 with the Olimex scripts run to beef up the silkscreen.
core4: is another revision of the 6802 CPU core.
core5: is another revision of the 6802 CPU core.
core6: is another revision of the 6802 CPU core.
core-ol: is the core board with the Olimex silkscreen scripts run.
core: is the last version of the 6802 core board.
quadrature: is a simple quadrature clock.
adaptor: is a simple adaptor board to put a 6809 in an 6802 socket.
core09ss: is an early version of the 6809 core board, with the 6809 replacing the 6802 (essentially building in the adapter board).
09-09e: is an adapter board for using the 6809E in a 6809 socket.
core09: is an early 6809E based CPU core.
core09e2: is a later version of the 6809E core.
core09e3: is a later version of the 6809E core, with Olimex silkscreen scripts run.
io-ol2: is a version of the IO board to match the 6809E core, and with Olimex scripts run.
core-ol2: is the 6809E core, with Olimex scripts run.
corex: is a slightly different version of the 6809E core.
core09e: is the latest version of the 6809E CPU core.
corex2: is the latest version of the 6809E CPU core.
iognd: is the IO board, with a ground plane added on both sides.
core09gnd: is the 6809E core board, with a ground plane added on both sides.
io: is the latest version of the IO board.
iotester: is a slight modification of the IO board, folding in the hooks for the tester board.

./ConsoleEmu/FlipChip: FlipChip Test Jig based on core and i/o boards.

flipchip: is a design for a flipchip tester based on the core and IO boards.
proto: explores some ideas output interfacing to Rxxx modules.

./ConsoleEmuFDC: Floppy Controller for ConsoleEmu Project

core09gnd: is a copy of the 6809E CPU core, used as a starting point to get the board dimensions and connectors in the right place.
fdc: is my Eagle drawing of Henk's floppy disk controller prototype.

./DEC: Various stuff pertaining to DEC gear.

./DEC/4U-4452: 4U 4452 Prototype card

4U-4452: is a drawing of a prototyping card I purchased in eBay.

./DEC/704: 8/I POWER SUPPLY +5V 10A, -15V 5A, -30V 6A, +15V UNFILTERED 5A, 50/60HZ

./DEC/708: PDP8 POWER SUPPLY & CONTROL 115V 60HZ

./DEC/713: VR12 POWER SUPPLY: +/-6V, +/-80V, +400V, +30V

./DEC/834: 1 STEP HG POWER CONT, 230V 20A, ECO 6/71 TO REMOVE MERCURY

./DEC/854: 7X19 834-B, ECO 6/71 TO REMOVE MERCURY

./DEC/861: 2 POLE 3 WIRE 24A 115V POWER CONTROL, 19 X 5.25 INCHES, 2.7SKVA

./DEC/8aPanel: PDP-8a Programmer's Panel

board1: is the latest drawing of board 1 (front) of the 8/A front panel replacement.
board2: is the latest drawing of board 2 (back) of the 8/A front panel replacement.
board2-4layer: is a 4 layer version of board2.
board2-c: is a version of board2 with a different layout (requested by Charles).
oboard2: is a checkpoint of an old version (06/02/2005) of board2.
Progpanl.fpd: is a Front Panel Express drawing of the Programmer's Panel artwork.
nosilkboth.brd: is both boards panelized, which is how the prototypes were ordered. This version has not had the silkscreen scripts run.
both.brd: is both boards panelized, which is how the prototypes were ordered. This version has had the silkscreen scripts run.
board1-0: is a snapshot of revision 0 of board1.
board2-0: is a snapshot of revision 0 of board2.
board1corrected: is board1 with the corrections to make DEC's schematics work.
board2corrected: is board2 with the first set of corrections to make DEC's schematics work. (Has a consistency problem to highlight changes.)
board2eco: is board2 with the first and second set of corrections applied to make it work. (Has a consistency problem which highlights the ECOs.)
5411507: is a drawing of the board inside the limited function panel.

./DEC/8ePanel: 8/E Front Panel

5409057D: is a drawing of DEC's 5409057 (bulb panel) revision D.

./DEC/8lPanel: PDP-8/L Front Panel PCB

8LPanelDec: needs a drawing.
8LPerspex: is a drawing of the artwork that mounts in the front of the PDP-8/L panel.

./DEC/Axxx: Axxx Modules

./DEC/Axxx/A008: AD8A 10 Bit A-D

A00B: needs a drawing.

./DEC/Axxx/A100: Multiplexor Switch

A100C: is a drawing of DEC's A100C.

./DEC/Axxx/A103: Multiplexor Switch

./DEC/Axxx/A111: Millivolt Multiplex Switch

A111C: needs a drawing.

./DEC/Axxx/A112: Low Level Multiplex Switch

A112A: needs a drawing.

./DEC/Axxx/A121: Multiplexor Switch

./DEC/Axxx/A123: MUX SWITCH, POS LOGIC, 4 SINGLE-POLE MOS FET SW, COMMON OUTPUT

./DEC/Axxx/A124: 4 Input Multiplexer Switch

./DEC/Axxx/A126: 8 Channel CMOS Analog Switch (double)

A126A: needs a drawing.

./DEC/Axxx/A130: Multiplexor

./DEC/Axxx/A131: Multiplexer

A131B: is a drawing of DEC's A131B.
A131X: is a 'modernized' version of the A131.

./DEC/Axxx/A133: Analog Switch

./DEC/Axxx/A140: 2 Chan. Analog Switch, for VT15

A140C: needs a drawing.

./DEC/Axxx/A163: Multiplexer and Amplifier

./DEC/Axxx/A200: Operational Amplifier

./DEC/Axxx/A202: Two Analog Preamplifiers

./DEC/Axxx/A209: 2 PREAMPS FOR 0 TO +2Y, MODIFIED A202 FOR LINC, GAIN OF 5

./DEC/Axxx/A214: 2 Analog Amplifiers

./DEC/Axxx/A215: Analog Buffer

./DEC/Axxx/A222: Selectable Gain Amplifier

./DEC/Axxx/A224: A224 WITH GAIN OF 10, +/- 1V IN

./DEC/Axxx/A225: Deflection Amplifier

./DEC/Axxx/A226: A226 WITH GAIN OF 20, 0 TO +1V IN

./DEC/Axxx/A231: 64 CH MUX CONTROL FOR A232 & A841

./DEC/Axxx/A232: 8 PREAMPS & 8 CH MUX EXPANSION, A131 & A215 CKTS, AM8-EB

./DEC/Axxx/A238: Dual Analog Summer and Driver (double)

A238C: needs a drawing.

./DEC/Axxx/A241: 4 PREAMPLIFIERS, MANUALLY SWITCHED 0 TO +2V, +/-5V, 0 TO +10V IN, +/-5V OUT, LOW TC, DOUBLE 8.5

./DEC/Axxx/A242: A241 W +/-1V IN, +/-5V OUT ONLY

./DEC/Axxx/A312: KV8/L Analog Function Generator, Double

A312E: needs a drawing.

./DEC/Axxx/A3170: Arbitrary Vector Generator (double, long)

A3170C: needs a drawing.

./DEC/Axxx/A3180: Arbitrary Integrator (double, long)

A3180C: needs a drawing.

./DEC/Axxx/A320: VECTOR GENERATOR & DRIVER FOR VT40, HEX 8.5

./DEC/Axxx/A400: Sample and Hold Amplifier

./DEC/Axxx/A401: Sample and Hold

./DEC/Axxx/A404: Sample and Hold

./DEC/Axxx/A405: Sample and Hold Amplifier

./DEC/Axxx/A406: SAMPLE & HOLD (15 BIT ACCURACY) SINGLE 8.5

./DEC/Axxx/A407: A406 8 CH MUX, SINGLE 8.5

./DEC/Axxx/A408: 8 CH SWITCHED GAIN MUX (1, 4, 16, 64), SINGLE 8.5

./DEC/Axxx/A440: 4 CHANNEL SAMPLE & HOLD (SIMILAR TO A405)

./DEC/Axxx/A460: SAMPLE & HOLD WITH NO INPUT RUFFER, 20-A460, DOUBLE X 5

./DEC/Axxx/A461: A460 WITH AN INPUT BUFFER, 20-A461, DOUBLE X 5

./DEC/Axxx/A502: Difference Amplifier

A502D: is a drawing of DEC's A502D.
A502X: is a 'modernized' version of the A502.

./DEC/Axxx/A601: 3 Bit DAC

A601E: is a drawing of DEC's A601E.
A601X: is a 'modernized' version of the A601.

./DEC/Axxx/A603: 2 Bit DAC

./DEC/Axxx/A604: 2-bit D-A Converter

A604E: is a drawing of DEC's A604E.
A604F: is a drawing of DEC's A604F.
A604H: needs a drawing.
A604X: is a 'modernized' version of the A604.

./DEC/Axxx/A605: 2-bit D-A Converter

./DEC/Axxx/A606: D-A Converter

./DEC/Axxx/A607: 10-bit Single Buffered D/A Converter, double

A607B: is a drawing of DEC's A607B.
A607X: is a 'modernized' version of the A607.

./DEC/Axxx/A612: D/A Converter for KV8/L, Double

A612B: needs a drawing.

./DEC/Axxx/A614: 12 Bit bipolar D/A Converter, Double Long

./DEC/Axxx/A615: D/A Converter

./DEC/Axxx/A618: 10 Bit D-A Converter (double)

A618E: needs a drawing.

./DEC/Axxx/A622: 10 Bit Single Buffered DAC 0 to 5V (double)

A622C: needs a drawing.

./DEC/Axxx/A625: 2 12-BIT DACS, +/-5V

./DEC/Axxx/A701: Reference Supply

./DEC/Axxx/A702: Reference Supply (-10V), double

A702B: is a drawing of DEC's A702B.
A702X: is a 'modernized' version of the A702.

./DEC/Axxx/A704: Reference Supply, Double

A704E: is a drawing of DEC's A704E.
A704F: needs a drawing.
A704X: is a 'modernized' version of the A704.

./DEC/Axxx/A705: (OBSOLETE), SAMPLE & HOLD

./DEC/Axxx/A706: Power Supply for A202

./DEC/Axxx/A708: Dual Voltage Regulator

./DEC/Axxx/A712: Voltage Regulator for KV8/L

A712A: needs a drawing.

./DEC/Axxx/A801: 10-bit A/D Converter

./DEC/Axxx/A804: 12 BIT A/D, +5 TO -5V

./DEC/Axxx/A811: 10-bit A/D Converter

./DEC/Axxx/A841: 10 BIT A/D WITH S&H, A405 + A811 CKTS, AD8-EA

./DEC/Axxx/A860: A/D Converter, Double

./DEC/Axxx/A862: 12 BIT A/D BIPOLAR, +/-10V IN, 48 USEC, 20-A862

./DEC/Axxx/A865: REPACKAGED A864 DOUBLE 8.5, 2 THICK

./DEC/Axxx/A877: 13-bit A/D Converter

./DEC/Axxx/A990: Operational Amplifier

./DEC/Axxx/A992: Operational Amplifier

./DEC/BM812i: Omnibus Memory adapter for PDP-8/i and PDP-12

proto: is a version od the bm812i board scaled down to a few sockets, to make ordering a prototype cheaper.
bm812i: is a version of DEC's BM812i with extra space between the connector blocks.
singleboard: is an implementation designed to fit into a single slot in a standard Omnibus backplane.
sboardnew: is a newer version of singleboard, using 74S240 instead of 74H40 to drive the bus.
bm812inl: is a version of the BM812i board without the extra space around the connector blocks. (It needs to be checked against the chassis to see if it has the needed clearances.)

./DEC/BM8L: Omnibus Memory adapter for PDP-8/L

bm8l: is a drawing of DEC's BM8/L.

./DEC/Bxxx: Bxxx Modules

./DEC/Bxxx/B104: 4 Inverters, 3 Loads

B104B: is a drawing of DEC's B104B.
B104C: is a drawing of DEC's B104C.
B104X: is a 'modernized' B104.

./DEC/Bxxx/B105: 5 Inverters, 5 Loads

B105B: is a drawing of DEC's B105B.
B105D: is a drawing of DEC's B105D.
B105X: is a 'modernized' B105.

./DEC/Bxxx/B113: 4 2-Input Negative NAND Gates, 3 Loads

B113A: is a drawing of DEC's B113A.
B113X: is a 'modernized' B113.

./DEC/Bxxx/B115: 3 3-Input Negative NAND Gates, 3 Loads

B115A: is a drawing of DEC's B115A.
B115B: is a drawing of DEC's B115B.
B115C: is a drawing of DEC's B115C.
B115X: is a 'modernized' B115.

./DEC/Bxxx/B117: 2 5-Input Negative NAND Gates

B117C: is a drawing of DEC's B117C.
B117X: is a 'modernized' B117.

./DEC/Bxxx/B123: 4 2-Input OC NAND Gates

./DEC/Bxxx/B124: 3 3-Input OC NOR Gates

./DEC/Bxxx/B130: 4 3-Input ANDs ORed, both outputs, Parity for 3 Bits

B130A: needs a drawing.
B130B: is a drawing of DEC's B130B.
B130X: is a 'modernized' B130.

./DEC/Bxxx/B131: PDP10 Adder

B131F: is a drawing of DEC's B131F.
B131X: is a 'modernized' B131.

./DEC/Bxxx/B132: LINC Adder

B131B: needs a drawing.

./DEC/Bxxx/B133: 2 mA equivalent to B113

B133C: is a drawing of DEC's B133C.
B133X: is a 'modernized' B133.

./DEC/Bxxx/B134: 4 2-Input Positive AND Gates, 3 Loads, 2mA

B134B: is a drawing of DEC's B134B.
B134X: is a 'modernized' B134.

./DEC/Bxxx/B135: 2 mA equivalent to B115

B135C: is a drawing of DEC's B135C.
B135X: is a 'modernized' B135.

./DEC/Bxxx/B136: 3 mA equivalent to B134

B136B: is a drawing of DEC's B136B.
B136X: is a 'modernized' B136.

./DEC/Bxxx/B137: 2 mA equivalent to B117

B137C: is a drawing of DEC's B137C.
B137X: is a 'modernized' B137.

./DEC/Bxxx/B138: PDP10 Adder (B131 with added diode to kill the carry quickly)

B138B: is a drawing of DEC's B138B.
B138X: is a 'modernized' B138.

./DEC/Bxxx/B141: 7 2-Input Gates, 2mA input equivalent to R141

B141A: is a drawing of DEC's B141A.
B141X: is a 'modernized' B141.

./DEC/Bxxx/B142: Diode Gate, B141 with 10mA Loads on inputs F, J, L, N, R, T, V, for PDP8

B142A: is a drawing of DEC's B142A.
B142X: is a 'modernized' B142.

./DEC/Bxxx/B152: Binary to Octal Decoder, R151 with higher fan-in & no clamp loads & no emitter gating

B152A: is a drawing of DEC's B152A.
B152X: is a 'modernized' B152.

./DEC/Bxxx/B155: Half Binary to Octal Decoder

./DEC/Bxxx/B156: 2mA equivalent to B155

B156A: is a drawing of DEC's B156A.
B156X: is a 'modernized' B156.

./DEC/Bxxx/B163: 6 2-Input Gates, 1 Paired Common Input, 2mA equivalent of R123

B163D: is a drawing of DEC's B163D.
B163X: is a 'modernized' B163.

./DEC/Bxxx/B165: 2mA Diode equivalent of B105

B165A: is a drawing of DEC's B165A.
B165X: is a 'modernized' B165.

./DEC/Bxxx/B166: Counting Gate for SC Adder of PDP10

B166A: is a drawing of DEC's B166A.
B166X: is a 'modernized' B166.

./DEC/Bxxx/B167: 8 2-Input NANDs ORed to 4 Outputs with 2 Enable Inputs, 2x4

B167D: is a drawing of DEC's B167D.
B167X: is a 'modernized' B167.

./DEC/Bxxx/B168: 4 3-Input NANDs ORed to 3 Outputs with 3 Enable Inputs, 3x3

B168B: is a drawing of DEC's B168B.
B168X: is a 'modernized' B168.

./DEC/Bxxx/B169: Diode Gate Equivalent to B129, PDP9, 8 2-Input NANDs ORed to 2 Outputs, 4 Enable Inputs, 4x2

./DEC/Bxxx/B171: 6 Sets of 2-Input ANDs ORed, both polarities out, PDP7

B171B: is a drawing of DEC's B171B.
B171C: is a drawing of DEC's B171C.
B171X: is a 'modernized' B171.

./DEC/Bxxx/B172: Faster B171, 2mA Fan-In

B172C: is a drawing of DEC's B172C.
B172X: is a 'modernized' B172.

./DEC/Bxxx/B173: 14 Input Negative NAND Gate with one input preceded by a 10 Input Positive NAND, ME10

./DEC/Bxxx/B198: Protection Comparator, PDP10 Memory, 0 & -3V in & out, Compares 2 8-bit Words

B198A: is a drawing of DEC's B198A.
B198X: is a 'modernized' B198.

./DEC/Bxxx/B199: FM Address Decoder for B250, ICs, double

./DEC/Bxxx/B200: Flip Flop

./DEC/Bxxx/B201: Flip Flop

B201E: is a drawing of DEC's B201E.
B201X: is a 'modernized' B201.

./DEC/Bxxx/B204: 4 Flip-flops

B204B: is a drawing of DEC's B204B.
B204D: is a drawing of DEC's B204D.
B204X: is a 'modernized' B204.

./DEC/Bxxx/B210: PDP-7 Accumulator, double

./DEC/Bxxx/B211: Flip-flop, Buffered, No Delay

./DEC/Bxxx/B212: Dual RS Flip-flop, PDP10, Bus Driver Output, Delayed & not Delayed RS Inputs

B212C: is a drawing of DEC's B212C.

./DEC/Bxxx/B213: PDP9 Flip-flop, Single Input Jam, no Delay

./DEC/Bxxx/B214: 4 Flip-flops, B204 made out of 3 mA Gates

./DEC/Bxxx/B250: Flip-flop Memory, PDP10, Fairchild ICs, 8x12 bits/card, double

B250D: is a drawing of DEC's B250D.

./DEC/Bxxx/B301: 10 MC One Shot

B301B: is a drawing of DEC's B301B.
B301D: is a drawing of DEC's B301D.

./DEC/Bxxx/B310: 4 Delay Lines, double

./DEC/Bxxx/B311: Tapped Delay Line, 200 ns, 25 ns steps, Emitter Follower Input

B311D: is a drawing of DEC's B311D.

./DEC/Bxxx/B312: Delay Line, B311 Continuously Variable, Diode Input, PDP10

B312B: is a drawing of DEC's B312B.

./DEC/Bxxx/B360: Screwdriver Delay Line + Pulse Amp, 200-250 ns max

B360C: is a drawing of DEC's B360C.
B360D: is a drawing of DEC's B360D.

./DEC/Bxxx/B401: Variable Clock

./DEC/Bxxx/B405: Crystal Clock, 2 to 10 MC

./DEC/Bxxx/B410: Voltage Controlled Clock, 1-10 MC, 40 to 100 ns negative pulses, potentiometer adjustment

./DEC/Bxxx/B602: Dual 10 MC Pulse Amplifier

B602A: is a drawing of DEC's B602A.

./DEC/Bxxx/B611: Dual Pulse Amplifier, 25 ns, PDP10

B611B: is a drawing of DEC's B611B.

./DEC/Bxxx/B620: Dual Carry Pulse Amplifier

./DEC/Bxxx/B681: 4 Power Inverters

./DEC/Bxxx/B683: 3 Bus Drivers, OR output, 50 ohm load, 0 -3V

B683C: is a drawing of DEC's B683C.
B683X: is a 'modernized' B683.

./DEC/Bxxx/B684: 2 Bus Drivers, like 6684

B684C: is a drawing of DEC's B684C.
B684X: is a 'modernized' B684.
B684X: is a 'modernized' B684.

./DEC/Bxxx/B685: 3 Diode Gate Drivers, 2 circuits, 80 mA at ground, 8 mA at -3V, PDP10

./DEC/CES: Computer Extension Systems Memory Boards

VM8E8K: needs a drawing

./DEC/COI_LINCtape: COI LINC Tape Controller

C10450-01: is a reverse engineered drawing of Doug Jones' LINC tape controller.
C1316G: is a reverse engineered drawing of the board inside Doug Jones' COI LINC tape drive.

./DEC/Charmille_Andrews: Charmille Andrews Paper Tape Reader Controller

005743-001: is a drawing of CA's 005743-001 paper tape reader controller.

./DEC/DM01: Data Break Multiplexor

DM04r: is an aborted attempt to think about doing a DMA multiplexer from scratch.
DM01: is DEC's DM01, done up as a board in Eagle.
DM01x2: is DEC's DM01, scaled down for just 2 devices.
DM01eco: is DEC's DM01, with a TechTip fix added.
DM04mux: is another aborted early DM04 attempt.
DM04ttl: is my design for a DMA multiplexer similar to the DM04, based on DEC's DM01.

./DEC/DMM-8E: DMM-8E Digicos MULT8 Timeshare Extension

DMM-8E-2: is a drawing of the Digicos Timeshare Extension.

./DEC/DW08A: Posibus to Negibus Converter

dw08a2s: is a two-sided board based on DEC's DW08A Posibus Converter backplane.
dw08aholes: is a version of dw08a2s with un-needed cutout holes, and only 6 mil traces (too thin).
dw08a: is dw08aholes with the power traces beefed up, and is the version that matches the prototypes. It has a mechanical interference fit at the right edge.
dw08aRev2: is a version of the dw08a backplane with the interference fit fixed, and the un-needed holes removed.
dw08aRev3: is a version of the dw08a backplane that fixes another interference fit, having to do with the backplane being more than 3U tall.
dw08a4lyr: is a four layer version, with all the traces beefed up.

./DEC/DW08Bx: Negibus to Posibus Converter

dw08a: is a version of the DW08A Posibus to Negibus Converter backplane, for reference.
dw08b: is a drawing that approximates DEC's DW08B Negibus to Posibus Converter backplane. It is still an "x" version because the part/pin numbering has not been checked against the DEC version.

./DEC/DouglasElectronics: Various Eagle approximations of boards sold by Douglas Electronics.

5-de-7: is a drawing of the 5-de-7.
10-de-77: is a drawing of the 10-de-77.
11-de-7: is a drawing of the 11-de-7.
18-de-77: is a drawing of the 18-de-77.
21-de-7: is a drawing of the 21-de-7.
21-de-77: is a drawing of the 21-de-77.
9-de-8: is a drawing of the 9-de-8.
26-de-8: is a drawing of the 26-de-8.
104-de-8: is a drawing of the 104-de-8.
26-de-8x: is a drawing of the 26-de-8 done with more mordern components.

./DEC/Gxxx: Gxxx modules

./DEC/Gxxx/G001: DC Sense Amp, PDP-7, double

./DEC/Gxxx/G005: 4-input Sense Amp, PDP-6, 2us, double

./DEC/Gxxx/G007: Sense Amplifier

G007C: is a drawing of DEC's G007C.
G007X: is a 'modernized' G007.

./DEC/Gxxx/G008: Slice Control for G007 & G009

G008A: is a drawing of DEC's G008A.
G008X: is a 'modernized' G008.

./DEC/Gxxx/G009: Sense Amplifier

G009B: is a drawing of DEC's G009B.

./DEC/Gxxx/G010: Sense Amp Selector for PDP-9, 164, also used for G012

./DEC/Gxxx/G020: Sense Amp for 8/I, G021 etch, IC levels

G020E: needs a drawing.
G020H: is a drawing of DEC's G020H.
G020X: is a 'modernized' G020H.

./DEC/Gxxx/G021: Dual Sense Amp for 8/I, IC levels, also used for G020

G021B: needs a drawing.
G021old: is a drawing of DEC's G021 Core Sense Amplifier board, with the unobtainium MC1540 sense amp chips.
G021dec: is a drawing of DEC's G021 Core Sense Amplifier board, with the unobtainium MC1540 sense amp chips.
G021K: is a drawing of DEC's G021K Core Sense Amplifier board, with the layout based on the G021H.
G021K-E: is a drawing of DEC's G021 Core Sense Amplifier board, with the layout based on the G021E.
G021Kng: is a drawing of DEC's G021 Core Sense Amplifier board, with the H layout, but without the gold edge connector.
G021vrs: is a drawing of DEC's G021 Core Sense Amplifier board, with the unobtainium MC1540 sense amp chips.
sense-amp: is an approximation of the function of the MC1540, using LM148 op-amps.
G021-1: is a 12/04/2004 checkpoint of G021.
G021: is a version of the G021 with the MC1540 replaced with LM837.

./DEC/Gxxx/G022: 4-input Sense Amp for PDP-10, with cable, +6.2V, -6.2V

./DEC/Gxxx/G023: Master Slice Control for G022

./DEC/Gxxx/G050: 9 Track, 45 ips, Dual Gap Head Read Amplifier

G050D: needs a drawing.

./DEC/Gxxx/G056: TU16, 9 CH READ AMP HEX 8.5

./DEC/Gxxx/G060: Mag Tape Compressor, 9 Track

./DEC/Gxxx/G062: Mag Tape Peak Detector, 9 Track

G062D: needs a drawing.

./DEC/Gxxx/G064: Mag Tape Slicer, 9 Track (double)

G064D: needs a drawing.

./DEC/Gxxx/G083: Disc Preamplifier

G083D: needs a drawing.

./DEC/Gxxx/G084: Mag Tape Read, Rectify, Slice Amp, TU20, also used on G086

G084C: needs a drawing.

./DEC/Gxxx/G085: Disk Amplifier, replaces 1/2 G083 + 1/2 W532 + 1/2 W533 (double)

G085E: needs a drawing.

./DEC/Gxxx/G0850: DISK AMP FOR DF32D, DS32-D

./DEC/Gxxx/G088: Read Amplifier and Peak Detector (double)

G088E: needs a drawing.

./DEC/Gxxx/G092: TIMING AMP + LOGIC, RS03, DBL X 8.5

./DEC/Gxxx/G093: TU10 PEAK DETECTOR (REPLACES G062)

./DEC/Gxxx/G094: Threshold and Buffer

./DEC/Gxxx/G100: Sense Amp & Inhibit Driver, PDP15, 3 wire, 3D memory (double)

G100E: needs a drawing.

./DEC/Gxxx/G102: Sense, Inhibit, & Register (4 bits) for MM11 & ME10 (long)

G102D: needs a drawing.

./DEC/Gxxx/G103: Memory Levels and Gates (long)

G103A: needs a drawing.

./DEC/Gxxx/G104: SENSE, INHIBIT, & 12 BIT REGISTER FOR MM8-E, QUAD, 8.5

./DEC/Gxxx/G180: LOW DENSITY (1100 BPI DOUBLE FREQ), R/W FOR RK04, DECPACK, DOUBLE X 8.5

./DEC/Gxxx/G182: R/W HEAD AND DETECTION, RS03, DBL X 8.5

./DEC/Gxxx/G203: Memory Selector (obsolete)

G203B: needs a drawing.

./DEC/Gxxx/G205: (OBS), PDP-8 INHIBIT DRIVER, REPLACED BY G208

./DEC/Gxxx/G206: Memory Selector, PDP-6, 2us, double, used for G212

./DEC/Gxxx/G207: Inhibit Driver, 4 Quadrant, PDP-6, 2us, double

./DEC/Gxxx/G208: Inhibit Driver

G208B: is a drawing of DEC's G208B.

./DEC/Gxxx/G209: Memory Selector, double

G209B: is a drawing of DEC's G209B.

./DEC/Gxxx/G212: Memory common Driver, G206 + Misc. R&D, G206 etch, for PDP6 2us memory

./DEC/Gxxx/G217: Word Driver, MA10, uses G219 for Digit Driver

./DEC/Gxxx/G219: Memory Selector (A G209 for negative supply), PDP9

./DEC/Gxxx/G221: Memory Driver, IC Inputs, 4 circuits, PDP8/I, PDP8/L

G221A: needs a drawing.
G221B: is a drawing of DEC's G221B.
G221X: is a 'modernized' version of DEC's G221B.

./DEC/Gxxx/G222: Memory Selector, PDP15

G222A: needs a drawing.

./DEC/Gxxx/G223: 2 Read-Write Drivers, PDP-15

G223D: is a drawing of DEC's G223D.

./DEC/Gxxx/G225: X and Y Current Source (long)

G225D: needs a drawing.

./DEC/Gxxx/G226: XY Selection Switch, single 8.5", ME10, MM11 (long)

H3190B: needs a drawing.

./DEC/Gxxx/G227: XY SELECTION, CURRENT SOURCE & REGULATOR FOR MM8-E, QUAD, 8.5

./DEC/Gxxx/G228: Core Memory Inhibit Driver, IC Inputs, 8/I, 8/L

G228B: needs a drawing.
G228C: needs a drawing.
G228H: is a drawing of DEC's G228H.
G228X: is a 'modernized' version of DEC's G228H.

./DEC/Gxxx/G230: Current Source, with Delay Line on input, 0 to 40ns

./DEC/Gxxx/G284: Disc Writer

G284D: needs a drawing.

./DEC/Gxxx/G285: Series Switch

G285A: needs a drawing.
G285B: needs a drawing.

./DEC/Gxxx/G286: Centertap Selector

G286A: needs a drawing.

./DEC/Gxxx/G287: Mag Tape Writer, 2 channels, 100mA Head Current, no center tap, 0 to -15V

G287B: needs a drawing.

./DEC/Gxxx/G290: Disk Writer, includes 2.5MHz flip-flop, RS09

G290A: needs a drawing.

./DEC/Gxxx/G291: Disc Writer with Power Fail

./DEC/Gxxx/G294: Disc Writer

./DEC/Gxxx/G295: Series Switch

./DEC/Gxxx/G296: Center Tap Selector

./DEC/Gxxx/G350: 9 Track, Dual Head, 45 IPS, Mag Tape Write Driver

./DEC/Gxxx/G380: Solenoid Drivers

G380E: needs a drawing.

./DEC/Gxxx/G381: Line Feed Solenoid Driver

G381A: needs a drawing.

./DEC/Gxxx/G500: TU55/TU56 Skew Tester

./DEC/Gxxx/G589: Differential Integrator/Amp, RP10 Controller, RP01-Memorex 630-1

./DEC/Gxxx/G590: Differential Filtered Integrator, RP10, RP02, Memorex 660

./DEC/Gxxx/G603: Memory Selector Matrix (non-standard size)

G603A: is a drawing of DEC's G603A.

./DEC/Gxxx/G604: Memory Selection Matrix, PDP-6

./DEC/Gxxx/G609: Memory Mounting Board

./DEC/Gxxx/G610: "A" Diode Matrix Board for PDP-8 stack 30-05256

./DEC/Gxxx/G611: "B" Diode Matrix Board for PDP-8 stack 30-05256 (double)

./DEC/Gxxx/G613: X Diode Matrix, 3 wire, 3D memory, 4K, 9/I

./DEC/Gxxx/G614: Y Diode Matrix, 3 wire, 3D memory, 4K, 9/I

./DEC/Gxxx/G618: VT15 Character Generator

G618BYA: needs a drawing.
G618BYB: needs a drawing.
G618BYC: needs a drawing.
G618BYD: needs a drawing.
G618BYE: needs a drawing.
G618BYF: needs a drawing.
G618BYG: needs a drawing.
G618BYH: needs a drawing.

./DEC/Gxxx/G619: 4K, 12 BIT, 20 MIL CORE MEMORY BOARD WITH DIODES, QUAD, 8.5 DEEP, FOR 8/E

./DEC/Gxxx/G621: (OBS), RESISTOR BOARD FOR 8 MEM, 4 INHIBIT, 1 READ/WRITE & CAP & DIODE

./DEC/Gxxx/G622: Resistor Board

./DEC/Gxxx/G624: Resistor Board for 8/I memory, similar to G621

G624C: is a drawing of DEC's G624C.
G624X: is a 'modernized' version of DEC's G624C.

./DEC/Gxxx/G626: Resistor Board for memory, PDP-10, 2.5 D

./DEC/Gxxx/G643: BRAID BOARD, 128 WIRES, 24 CORES, 1 DIODE PER WIRE (MR8-E), PLUGS INTO M880

./DEC/Gxxx/G680: DS32 Disk Head Matrix

./DEC/Gxxx/G681: Track Matrix

./DEC/Gxxx/G700: 100 Ohm Cable Terminator, W028 etch

G700B: needs a drawing.

./DEC/Gxxx/G7000: I/O Bus Terminator 1

./DEC/Gxxx/G7001: I/O Bus Terminator 2

./DEC/Gxxx/G7002: I/O Bus Terminator 3

./DEC/Gxxx/G7003: I/O Bus Terminator used in H807, quick-latch terminator

./DEC/Gxxx/G7004: I/O Bus Terminator used in H807, quick-latch terminator

./DEC/Gxxx/G7005: I/O Bus Terminator used in H807, quick-latch terminator

./DEC/Gxxx/G7006: I/O Bus Terminator used in H807, quick-latch terminator

./DEC/Gxxx/G701: Cable Terminator

./DEC/Gxxx/G702: DS32 Disk Simulator

./DEC/Gxxx/G703: 100 ohm Terminator, G700 pattern, double board with cut-out to fit over H003 or H004

./DEC/Gxxx/G704: 2 mA Level Terminator, G796 etch & components

G704B: needs a drawing.

./DEC/Gxxx/G705: DEC Tape Jumper Module

./DEC/Gxxx/G706: DEC Tape Attenuator

./DEC/Gxxx/G708: Diode Board (double)

./DEC/Gxxx/G709: Cable Terminator

G709A: needs a drawing.

./DEC/Gxxx/G711: RF08 Terminator Board

G711A: needs a drawing.

./DEC/Gxxx/G715: Terminator, equiv 100 ohms to +4V, uses +10V & ground, G700 pins

./DEC/Gxxx/G716: RESISTOR BOARD, R002 LAYOUT, USED IN AX08

./DEC/Gxxx/G717: Positive Bus Control Signal Terminator, 5 100 ohms to ground, pins K2, M2, P2, S2, T2, same grounds as W022

G717: is an implementation of DEC's G717 bus terminator.

./DEC/Gxxx/G718: Timing Jumper for PDP12, when plugged in upside down, each delay line tape is shifted

./DEC/Gxxx/G719: RF08 Terminator Board

G719A: needs a drawing.

./DEC/Gxxx/G720: RF08 Terminator Board

G720A: needs a drawing.

./DEC/Gxxx/G723: RF09 Cable Terminator

G723A: needs a drawing.

./DEC/Gxxx/G724: JUMPER MODULE FOR DC08A CHECKOUT, ADJACENT PINS JUMPERED EXCEPT A1-B1, A2-82

./DEC/Gxxx/G726: ME10 Bus Control, a Jumper Board

./DEC/Gxxx/G727: Grant Continuity, a Jumper Board

./DEC/Gxxx/G7273: Grant Continuity, double height

./DEC/Gxxx/G728: Jumper Card (double)

G728A: needs a drawing.

./DEC/Gxxx/G734: Input Clamp

./DEC/Gxxx/G736: Jumper Module

G736A: needs a drawing.

./DEC/Gxxx/G737: 9 Dividers, 150 ohms to +3V, W028 pins

./DEC/Gxxx/G738: Peripheral Terminator

./DEC/Gxxx/G739: Peripheral Terminator

./DEC/Gxxx/G740: Disk Selection

G740A: needs a drawing.

./DEC/Gxxx/G741: TU10 Negative Bus Terminator

G741B: needs a drawing.
G741C: needs a drawing.
G741CYA: needs a drawing.

./DEC/Gxxx/G742: Jumper Card, pins of non-inverting M500 & M531, TU56 with positive logic controls

./DEC/Gxxx/G766: G796 with 3M cable, 14 signals, 2 grounds

./DEC/Gxxx/G769: KV8/I TO VT02, G778 ETCH

./DEC/Gxxx/G772: PDP-11 Power Connector

G772B: is a drawing of DEC's G772B.
G772X: is a 'modernized' version of DEC's G772B.

./DEC/Gxxx/G775: 36 wires to Indicator, Q's, +6.5V from lamps, RF09

./DEC/Gxxx/G778: KV8I Cable Connector

G778A: is a drawing of DEC's G778A.
G778X: is a 'modernized' version of DEC's G778A.

./DEC/Gxxx/G780: Power Connector Card for PDP-12

./DEC/Gxxx/G783: 9 Twisted Pair and Shield, 1 pair ground return

./DEC/Gxxx/G785: Power Connector, 8/L, with Power OK (double)

G785D: needs a drawing.
G785E: is a drawing of DEC's G785E.
G785X: is a 'modernized' version of DEC's G785E.

./DEC/Gxxx/G789: Signal Simulator Connector

./DEC/Gxxx/G790: Signal Simulator Generator

./DEC/Gxxx/G792: PDP-8/I Power Connector

G792A: is an drawing of DEC's G792A power connector.

./DEC/Gxxx/G793: PDP-8/I Switch Connector, 8/I to console

./DEC/Gxxx/G795: Clamped Level Cable Connector, W021 pins, diodes to +0.7V & -3V, PDP-9, extended memory

G795D: needs a drawing.

./DEC/Gxxx/G796: Clamped Level Cable Connector, W034 with clamps, ground and -3V with 2mA clamped loads, G704 etch

G796B: needs a drawing.

./DEC/Gxxx/G799: Cable Connector

./DEC/Gxxx/G800: Control for 739 Power Supply

./DEC/Gxxx/G8000: Filter Network (short)

G8000A: needs a drawing.

./DEC/Gxxx/G8002: AC/DC Low Sensor

G8002C: needs a drawing.

./DEC/Gxxx/G8004: Power Fail

./DEC/Gxxx/G8010: -5.2V Control (long)

./DEC/Gxxx/G8014: Low Voltage Detector (long)

./DEC/Gxxx/G8016: REGULATOR FOR H763, QUAD

./DEC/Gxxx/G8018: POWER SUPPLY REGULATOR FOR 8A400., 8A500

./DEC/Gxxx/G802: REGULATOR TRANSISTORS FOR PDP-8 EXTENDED MEMORY, DOUBLE HEIGHT, DOUBLE THICK

./DEC/Gxxx/G803: Rectifying Slicer

G803A: is a drawing of DEC's G803A.
G803X: is a 'modernized' G803.

./DEC/Gxxx/G804: Control for G805

./DEC/Gxxx/G805: Regulator for negative 8 memory, Double

./DEC/Gxxx/G806: (OBS), LIKE G804 BUT TURNS OFF REGULATOR INSTEAD OF DRIVING EXT RELAY, (DRIVES G805)

./DEC/Gxxx/G808: Control for 708 Power Supply

./DEC/Gxxx/G809: -15V Sense and Relay Driver

./DEC/Gxxx/G810: 6V Regulator Control, Drives a G805

./DEC/Gxxx/G813: REGULATOR CONTROL FOR 704, DOUBLE MODULE SHAPE, DOESN'T PLUG IN

./DEC/Gxxx/G816: Modified G806 for driving 70V Power Supply Regulator Outputs

./DEC/Gxxx/G817: Card 1 for 713

./DEC/Gxxx/G818: Card 2 for 713

./DEC/Gxxx/G820: LINC-8 Positive Power Supply

G820A: needs a drawing.

./DEC/Gxxx/G821: +5V Regulator Control and Output Card for PDP15, see G829 (double)

G821C: needs a drawing.

./DEC/Gxxx/G822: -6V Regulator (from -10V) for sense amps, PDP15 (double)

G822C: needs a drawing.

./DEC/Gxxx/G823: -24V Memory Regulator Control, drives G825, PDP15

G823C: needs a drawing.

./DEC/Gxxx/G824: +5V Regulator Control for PDP-12, double

G824A: is a drawing of DEC's G824A.

./DEC/Gxxx/G825: -24V Pass Element (double)

G825B: needs a drawing.

./DEC/Gxxx/G826: Regulator Control for 8/I, drives G805 & detects presence of other voltages (double)

G826D: needs a drawing.
G826K: is a drawing of DEC's G826K.
G826X: is a 'modernized' version of DEC's G826K.

./DEC/Gxxx/G827: Low Voltage Detector, PDP-15, + K303 RC's detects +9V, uses +5V

G827A: needs a drawing.

./DEC/Gxxx/G828: Regulator Control, ME10, uses G805

./DEC/Gxxx/G829: 5V Connector Card for PDP15 peripherals, with over-voltage SCR & fuse, can replace G821 (double)

G829A: needs a drawing.

./DEC/Gxxx/G830: 5V, 10 Amp Regulator from 8V, KI10

./DEC/Gxxx/G831: -10V Reference, +5V output, 0 to +10V 6-bit DAC, Marginal Check Control, KI10

./DEC/Gxxx/G836: Positive & -20V Regulator for VT14

./DEC/Gxxx/G8360: VR14 Power Supply and Regulator

./DEC/Gxxx/G838: Fault Protection, provides +5V for intensity board W682, in VR14

./DEC/Gxxx/G839: COLOR GAIN COMPENSATOR, INCLUDES +5V FOR INTENSITY BOARD W682 IN VR20

./DEC/Gxxx/G840: VT40 Light Pen Amplifier

./DEC/Gxxx/G847: Dual Voltage Control for G848, TU56

G847C: needs a drawing.
G847D: needs a drawing.
G847E: needs a drawing.

./DEC/Gxxx/G848: TU56 Motor Drive, Triple

G848H: needs a drawing.
G848L: needs a drawing.
G848M: is a drawing of DEC's G848M.

./DEC/Gxxx/G850: SCR Motor Driver, TU55

G850L: is a drawing of DEC's G850L.
G850X: is a 'modernized' G850.

./DEC/Gxxx/G851: DECtape Relay Module

G851B: is a drawing of DEC's G851B.
G851X: is a 'modernized' G851.

./DEC/Gxxx/G853: DECtape Misc, Single Unit Selection & Timing Track Sensing

G853A: is a drawing of DEC's G853A.
G853X: is a 'modernized' G853.

./DEC/Gxxx/G854: Telegraph Line Circuit

./DEC/Gxxx/G855: DUAL TELEGRAPH LEVEL CONV, REPLACES G852 IN MODIFIED SYSTEM

./DEC/Gxxx/G856: G855 WITH + LOGIC INPUT LEVELS, DC08, 50-80V, DOUBLE THICK

./DEC/Gxxx/G858: PDP 15 Teletype Connector Card

G858A: needs a drawing.

./DEC/Gxxx/G859: Clock and Regulator for TU56 (long)

G859A: needs a drawing.

./DEC/Gxxx/G860: TELEGRAPH LEVEL CONV, G856 WITH CONTACT SUP FOR 13SVDC, DC08-C

./DEC/Gxxx/G861: SOLID STATE XMTR, 2 CKTS, EACH SPDT FROM +80 TO -80V, 400 MA MAX, DC08-CS, DOUBLE

./DEC/Gxxx/G862: SOLID STATE RCVR, 2 CKTS, 8.5 TO 75 MA THRESHOLD ADJ, HIGH COM MODE REJ

./DEC/Gxxx/G863: G856 WITH DIFFERENT CONTACT PROTECTION FOR GPD, IN DC08-L

./DEC/Gxxx/G879: Transport Detector, TC08, TC09, TC15

G879A: is a drawing of DEC's G879A Transport Detector.
G879X: is a 'modernized' G879.

./DEC/Gxxx/G882: Manchester Reader-Writer

G882B: is a drawing of DEC's G882B.
G882X: is a 'modernized' G882.

./DEC/Gxxx/G888: Manchester Reader/Writer

G888A: is a drawing DEC's G888A.
G888X: is a 'modernized' version of the G888A.

./DEC/Gxxx/G900: TAPE PHOTOCELL AMPLIFIER

./DEC/Gxxx/G9002: AC/DC Low Sensor

./DEC/Gxxx/G903: Clock Accelerator for Paper Tape Reader

./DEC/Gxxx/G904: PAPER TAPE PHOTOCELL AMP, USES SDA, 9 CHANNEL, DOUBLE BOARD

./DEC/Gxxx/G906: LINC-8 Capacitor and Power Up

./DEC/Gxxx/G908: + OUTPUT VERSION OF G904, LAMP FOR -15V INSTEAD OF +10, USES HOFFMAN PHOTOCELL

./DEC/Gxxx/G912: Deflection Amplifier, -12 Amps into 30uH Push-Pull Yoke, 15us full deflection time, VR12, Long, Double, Thick

./DEC/Gxxx/G913: Clock Control, (G903 + 1/2 R302 + 1/3 R603)

./DEC/Gxxx/G915: POWER ENABLE, MOTOR START, PP67-C,D

./DEC/Gxxx/G916: Power Detector & Switch Filter, PDP-12

./DEC/Gxxx/G917: Gain & Set Control for VR12

./DEC/Gxxx/G918: Photocell Amplifier for PT04, PT05, replacement for G908, for photo-transistors

./DEC/Gxxx/G919: LIGHT PEN OUTPUT AMPLIFIER

./DEC/Gxxx/G920: Control Memory

./DEC/Gxxx/G921: PDP-8/L Console (plugs in)

./DEC/Gxxx/G930: NON-STORE TAPE ALLOTMENT FOR PR68-C,D

./DEC/Gxxx/G932: Capstan Servo Preamp (drives H603)

./DEC/Gxxx/G933: Reel Motor Amp for TU10, +/-12V, +/-6A

G933D: needs a drawing.

./DEC/Gxxx/G934: BRAKE ACTUATOR FOR TU10, 6V, INITIALLY 0.8A, FINALLY 0.1A

./DEC/Gxxx/G9340: Brake Actuator

G9340A: needs a drawing.

./DEC/Gxxx/G9341: TU10 Brake Driver

G9341A: needs a drawing.
G9341B: needs a drawing.

./DEC/Gxxx/G936: Clock Accelerator

G936C: needs a drawing.

./DEC/Gxxx/G938: DECPack Head Position Servo Preamp, Long, Double

./DEC/Gxxx/G998: Current Measuring Extender, 1-1/2 length with Bus Loops

./DEC/Hxxx: Hxxx Modules

./DEC/Hxxx/H211: 4K 12 BIT ON G646, 3 WIRE 3D, 18 MIL CORES, MM8-EH

./DEC/Hxxx/H212: 8K 12 BIT H211, MM8-EJ, PS-3010654

./DEC/Hxxx/H220: 4K, 12 BIT, 22 MIL STACK ON G619, PS 3009834

./DEC/Hxxx/H304: CLINICAL CHEM TERM BOX, \(FOR AUTO ANALYZER, TECHNICON\)

./DEC/Hxxx/H314: INTEGRATED CIRCUIT SAMPLER, 180 IC'S

./DEC/Hxxx/H319: 20 MA CURRENT LOOP RECEIVER \(OPTICAL ISOLATER RECEIVER, PASS-THROUGH TRANSMITTER\)

./DEC/Hxxx/H3190: Staggered Turnaround (long)

H3190B: needs a drawing.

./DEC/Hxxx/H603: CAPSTAN SERVO POWER AMP FOR TU10 \(PREAMP IS G932\)

./DEC/Hxxx/H604: DECPACK HEAD POSITION SERVO POWER AMP, \(PREAMP IS G938\)

./DEC/Hxxx/H605: MOTOR DRIVE AMP, LA30

./DEC/Hxxx/H606: TU16 POWER BOARD \(CAPSTAN PREAMP, POWER AMP, REEL MOTOR AMPS, BRAKE ACTUATORS\)

./DEC/Hxxx/H704: REG. DUAL POWER SUPPLY, 15V @ 400 MA. FLOATING, MOUNTS ON 1943 OR H911, 115Y

./DEC/Hxxx/H707: LIKE H704, BUT 1.5 AMPS FROM EACH OF THE TWO 15 V SUPPLIES, DELTRON \(OVERHEATS OVER 1 AMP\)

./DEC/Hxxx/H719: H716 + 160 MF, 20V ON 19" X 10-1/2 PANEL

./DEC/Hxxx/H724: 230V H724

./DEC/Hxxx/H735: LA30 SUPPLY, +15V 5A, +10V 4A, +5V 1A, -15V 5A, DUAL FREQ RESONANT SUPPLY 16-10416

./DEC/Hxxx/H737: 115/230V, +20V 1.5A \(5409484\), +5V 8A \(5409503\), -15V 2A \(5409484\)

./DEC/Hxxx/H740: +5V20A, -15V5A, +15V1A, ACLO, DCLO, LINE FREQ SIG, 115/230V, 47-63HZ \(5409728\) 3.5X19 PANEL

./DEC/Hxxx/H748: VT20-BC, -BD SUPPLY: +5V 4A, +15V 750MA, -15V 750MA, VT20, 95-130VAC, 190-260VAC

./DEC/Hxxx/H751: 190-260VAC H751-A

./DEC/Hxxx/H755: LPS SUPPLY, +5V 13A, +/-15V +/-.03% 2A, LINEAR REGULATORS, 100, 115, 200, 230V +/-10%, 47-63 HZ

./DEC/Hxxx/H763: PDP8-A POWER SUPPLY, 115V

./DEC/Hxxx/H764: TWO 5409728 \(H740\) REGULATORS, EACH +5V 17A, -15V 5A, +15V 1A, ACLO, DCLO \(RP04\)

./DEC/Hxxx/H765: PS FOR BA11-K, +15V 2A, 8V 1A, ACLO, DCLO, LINE FREQ SIGNAL, 2 H744, H745, H754, 5410993, 230V

./DEC/Hxxx/H807: CONNECTOR BLOCK,36 PIN SINGLE MODULE DOUBLE-SIDED CONNECTOR, .025 SQUARE, 12-09123

./DEC/Hxxx/H815: GARDNER DENVER GUN ALONE

./DEC/Hxxx/H851: Top Connector Block

H851C: is a drawing of DEC's H851C.
H851X: is a drawing of a 'modernized' H851.

./DEC/Hxxx/H8511: H807 W ALL CORRESPONDING SIDE 1 & SIDE 2 PINS CONNECTED TOGETHER

./DEC/Hxxx/H854: 40 PIN CONNECTOR, MALE, USED ON 8/E MODULES, 12-09941

./DEC/Hxxx/H856: MATES TO H854 WITH POKE HOME CONTACTS \(BERG\) \(1210090 HOUSING, 1210089 PINS\)

./DEC/Hxxx/H900: FLIP-CHIP MNTG PANEL & POWER SUPPLY \(USES H701\)

./DEC/Hxxx/H901: Patchcord Mounting Panel

./DEC/Hxxx/H902: Indicator Switch Panel

./DEC/Hxxx/H903: Analog-Digital Panel

./DEC/Hxxx/H911: H911-R W SLOTTED BLOCKS \(H863\)

./DEC/Hxxx/H9192: PDP8-A BUS CONNECTOR BLOCK ASSEMBLY \(10 QUAD SLOTS\)

./DEC/Hxxx/H9194: PDP8-A BUS CONNECTOR BLOCK ASSEMBLY \(7 QUAD + 5 QUINT SLOTS\)

./DEC/Kxxx: Kxxx modules

./DEC/Kxxx/K003: Gate Expander

./DEC/Kxxx/K026: Gate Expander

./DEC/Kxxx/K113: Inverting Gate

./DEC/Kxxx/K123: English Gate

./DEC/Kxxx/K138: Eight Inverters

./DEC/Kxxx/K210: Decimal or Binary Counter

./DEC/Kxxx/K220: Decimal Up/Down Counter, Double

./DEC/Kxxx/K230: Parallel Input Shift Register

./DEC/Kxxx/K265: FIVE 100 MA REED RELAYS & DRIVERS, EITHER AXIAL OR PC RELAYS

./DEC/Kxxx/K271: Set/Reset Memory

./DEC/Kxxx/K273: Retentive Memory

./DEC/Kxxx/K303: Three Delay Timers

K303B: needs a drawing.

./DEC/Kxxx/K374: Calibrated Timer Control

./DEC/Kxxx/K376: Calibrated Timer Control

./DEC/Kxxx/K378: Calibrated Timer Control

./DEC/Kxxx/K508: Pilot Circuit Converter, Double

./DEC/Kxxx/K522: Comparator

./DEC/Kxxx/K604: Pilot Circuit Converter, Double

./DEC/Kxxx/K614: Isolated AC Switch

./DEC/Kxxx/K652: DC Driver

./DEC/Kxxx/K671: Decade Display

./DEC/Kxxx/K683: Driver

./DEC/Kxxx/K716: Pilot Circuit Converter, Double

./DEC/Kxxx/K724: INTERFACE SHELL, USED FOR PDP14 I/O BOX SHELL

./DEC/Kxxx/K725: INTERFACE SHELL, USES A PRINTED BACKPLANE FOR CONNECTIONS, 16 IN, 8 OUT \(PDP14 I/O BOX\)

./DEC/Kxxx/K731: Multi-Purpose Source

./DEC/Kxxx/K732: Slave Regulator

./DEC/Kxxx/K791: Test Probe

./DEC/Kxxx/K940: Mounting Bar Support

./DEC/Kxxx/K941: Mounting Bar

./DEC/M11x: Replacement for M11[13579] modules.

MxxxRow: is a drawing for TTL versions of the M11[13579], all on one board. (Populate only the row for the desired module type.)
MxxxCol: is similar to MxxxRow, but arranges the chips in columns (less successful).
Mxxx: is a module that implements the M11[13579] in TTL (a newer version of MxxxRow).
mxxx.pl: is some Perl code to look at input-output mapping for PAL implementations.
PALFromPerl: is a PAL-based version based on the results from mxxx.pl.
PALVersion: is another PAL-based version similar to PalFromPerl.
PAL3579: is a PAL version that fits everything except the M111.
PAL13579: is a PAL version that fits everything, but needs a fourth PAL.
MxxxOVR: is the latest through-hole TTL version.
MxxxSMT: is an SMT verstion, which adds the M206/M216 and M207.
MxxxSMT8x11: is an 7.7"x10.1" panelization of six MxxxSMT.

./DEC/MSC_303-0115: Omnibus Memory Extension and Timeshare Option (M837 clone)

MSC_303-0115: needs a drawing.

./DEC/Mxxx: Mxxx modules

./DEC/Mxxx/M002: 15 Loads

M002A: is a drawing of DEC's M002A.
M002X: is a 'modernized' M002.

./DEC/Mxxx/M040: Solenoid Driver

M040E: is a drawing of DEC's M040E.
M040X: is a 'modernized' M040.

./DEC/Mxxx/M044: 4-100mA Solenoid Drivers

M044B: is a drawing of DEC's M044B.
M044X: is a 'modernized' M044.

./DEC/Mxxx/M050: Inverter driver, 12 circuits, switch -30V and 50mA max/driver

M050B: is a drawing of DEC's M050B.
M050X: is a 'modernized' M050.

./DEC/Mxxx/M051: Level Converter, positive logic in and negative logic out, 12 circuits, open collector

M051B: is a drawing of DEC's M051B.
M051X: is a 'modernized' M051.

./DEC/Mxxx/M060: Solenoid Driver

M060A: is a drawing of DEC's M060A.
M060X: is a 'modernized' M060.

./DEC/Mxxx/M100: Bus Data Interface

M100A: is a drawing of DEC's M100A.
M100X: is a 'modernized' M100.

./DEC/Mxxx/M101: Bus Data Interface

M101A: is a drawing of DEC's M101A.
M101X: is a 'modernized' M101.

./DEC/Mxxx/M102: Negative Bus Equivalent to M103

M102A: is a drawing of DEC's M102A.
M102X: is a 'modernized' M102.

./DEC/Mxxx/M103: Device Selector

M103A: is a drawing of DEC's M103A.
M103B: is a drawing of DEC's M103B.
M103X: is a 'modernized' M103.

./DEC/Mxxx/M104: I/O Bus Multiplexor

M104C: is a drawing of DEC's M104C.
M104D: is a drawing of DEC's M104D.

./DEC/Mxxx/M105: Address Selector (long)

M105B: is a drawing of DEC's M105B.
M105C: is a drawing of DEC's M105C.
M105X: is a 'modernized' M105.

./DEC/Mxxx/M106: Dot NOR Gates

M106A: is a drawing of DEC's M106A.
M106X: is a 'modernized' M106.

./DEC/Mxxx/M107: Device Selector

./DEC/Mxxx/M108: Flag Module

./DEC/Mxxx/M109: Device Select Module

M109A: is a drawing of DEC's M109A.
M109X: is a 'modernized' M109.

./DEC/Mxxx/M1091: Memory Device Select (long)

M1091A: is a drawing of DEC's M1091A.
M1091X: is a 'modernized' drawing of DEC's M1091.

./DEC/Mxxx/M1103: 10 2-Input AND Gates

M1103A: is a drawing of DEC's M1103A.
M1103X: is a 'modernized' M1103.

./DEC/Mxxx/M111: Inverters

M111A: is a drawing of DEC's M111A.
M111B: is a drawing of DEC's M111B.
M111C: is a drawing of DEC's M111C.
M111D: is a drawing of DEC's M111D.
M111X: is a 'modernized' M111.

./DEC/Mxxx/M112: NOR Gates

M112D: is a drawing of DEC's M112D.
M112E: is a drawing of DEC's M112E.
M112X: is a 'modernized' M112.

./DEC/Mxxx/M1125: 10 Exclusive OR Gates

M1125A: is a drawing of DEC's M1125A.
M1125X: is a 'modernized' M1125.

./DEC/Mxxx/M113: 10 2-Input NAND Gates

M113B: is a drawing of DEC's M113B.
M113C: is a drawing of DEC's M113C.
M113D: is a drawing of DEC's M113D.
M113X: is a 'modernized' M113.

./DEC/Mxxx/M115: 8 3-Input NAND Gates

M115C: is a drawing of DEC's M115C.
M115D: is a drawing of DEC's M115D.
M115X: is a 'modernized' M115.

./DEC/Mxxx/M116: 6 4-Input NOR Gates

M116A: is a drawing of DEC's M116A.
M116X: is a 'modernized' M116.

./DEC/Mxxx/M117: 6 4-Input NAND Gates

M117B: is a drawing of DEC's M117B.
M117C: is a drawing of DEC's M117C.
M117E: is a drawing of DEC's M117E.
M117X: is a 'modernized' M117.

./DEC/Mxxx/M119: 3 8-Input NAND Gates

M119B: is a drawing of DEC's M119B.
M119C: is a drawing of DEC's M119C.
M119X: is a 'modernized' M119.

./DEC/Mxxx/M121: 6 AND-NOR Gates

M121B: is a drawing of DEC's M121B.
M121D: is a drawing of DEC's M121D.
M121X: is a 'modernized' M121.

./DEC/Mxxx/M126: H version of M121, not pin compatible

./DEC/Mxxx/M127: 3 2-2-2-3 AND-NOR Gates

M127A: is a drawing of DEC's M127A.
M127X: is a 'modernized' M127.

./DEC/Mxxx/M129: 4-4 AND-NOR, H, 4 circuits

M129A: is a drawing of DEC's M129A.
M129X: is a 'modernized' M129.

./DEC/Mxxx/M130: 5 8-bit parity circuits + 5 2-input XOR gates (MC4008)

./DEC/Mxxx/M1307: 6 4-Input AND Gates

./DEC/Mxxx/M133: 10-2 Input NAND Gates

M133A: is a drawing of DEC's M133A.
M133B: is a drawing of DEC's M133B.
M133X: is a 'modernized' M133.

./DEC/Mxxx/M135: 8-3 Input NAND Gates

M135A: is a drawing of DEC's M135A.
M135X: is a 'modernized' M135.

./DEC/Mxxx/M139: H version of M119

M139A: is a drawing of DEC's M139A.
M139X: is a 'modernized' M139.

./DEC/Mxxx/M141: Two 2-2-2-2 AND-NOR gates, 2-2-2 AND-NOR gate. 2 input NAND, 2 inverters

M141B: is a drawing of DEC's M141B.
M141X: is a 'modernized' M141.

./DEC/Mxxx/M142: Adder, discrete equivalent to M132

./DEC/Mxxx/M143: 10 2-input NAND gates, with one pair sharing common input, KI10

./DEC/Mxxx/M145: 3-input NAND gates, 7 circuits, 74H, KI10

./DEC/Mxxx/M149: 9x2 NAND Wired OR Matrix

M149A: is a drawing of DEC's M149A.
M149C: is a drawing of DEC's M149C.
M149X: is a 'modernized' M149.

./DEC/Mxxx/M1500: Bi-directional Bus Interfacing Gates, extended single

./DEC/Mxxx/M1501: Bus Input Interface, extended single

M1501B: is a drawing of DEC's M1501B.
M1501X: is a 'modernized' M1501.

./DEC/Mxxx/M1502: Bus Output Interface, extended double

M1502C: is a drawing of DEC's M1502C.
M1502X: is a 'modernized' M1502.

./DEC/Mxxx/M151: Dual binary to octal with enable, H series, KI10, 74H20

./DEC/Mxxx/M1510: Bus Device Selector Module, extended double

./DEC/Mxxx/M152: M151 non-inverting, KI10, 74H21

M152B: is a drawing of DEC's M152B.
M152X: is a 'modernized' M152.

./DEC/Mxxx/M155: 4 Line to 16 Line Decoder, uses 50-08908 board

M155A: is a drawing of DEC's M155A.
M155X: is a 'modernized' M155.

./DEC/Mxxx/M159: 4 bit Arithmetic Logic Unit (DEC 74181), uses 50-08908 board

M159A: is a drawing of DEC's M159A.
M159X: is a 'modernized' M159.

./DEC/Mxxx/M160: AND-NOR Gate Module

M160C: is a drawing of DEC's M160C.
M160X: is a 'modernized' M160.

./DEC/Mxxx/M161: Binary to Octal/Decimal Decoder

M161: is a version of revision C with design rules more suited to milling individual PCBs.
M161C: is a drawing of DEC's M161C.
M161X: is a 'modernized' M161.

./DEC/Mxxx/M162: Parity Circuit

M162A: is a drawing of DEC's M162A.
M162B: is a drawing of DEC's M162B.
M162X: is a 'modernized' M162.

./DEC/Mxxx/M163: Dual binary to decimal decoder

M163A: is a drawing of DEC's M163A.
M163X: is a 'modernized' M163.

./DEC/Mxxx/M164: 6-bit adder for PDP-15, 2 adders for carry-in 1 or 0

M164B: is a drawing of DEC's M164B.
M164X: is a 'modernized' M164.

./DEC/Mxxx/M165: Memory buffer, inverting and non-inverting output from open collector, 8 channels for KI10

M165D: is a drawing of DEC's M165D.
M165X: is a 'modernized' M165.

./DEC/Mxxx/M166: 9-bit Counting Gate, KI10

./DEC/Mxxx/M167: 8 Bit Magnitude Comparator

M167B: needs a drawing.

./DEC/Mxxx/M168: 12 Bit Magnitude Comparator

M168A: is a drawing of DEC's M168A.
M168X: is a 'modernized' M168.

./DEC/Mxxx/M169: Functional gate module for PDP-12, 4 4-bit output multiplexors

M169B: is a drawing of DEC's M169B.
M169X: is a 'modernized' M169.

./DEC/Mxxx/M170: 3-3-3-2-2-2-2-2 AND-NOR & 3-2-2-2 AND-NOR, H series, KI10

./DEC/Mxxx/M1701: 4 to 1 MUX, 4 circuits, 74153, 08912 etch

M1701D: is a drawing of DEC's M1701D.
M1701X: is a 'modernized' M1701.

./DEC/Mxxx/M1703: Omnibus Dual 12 bit Input Interface

M1703C: is a drawing of DEC's M1703C.

./DEC/Mxxx/M1705: Omnibus Dual 12 bit Output Interface

M1705B: is a drawing of DEC's M1705B.
M1705Beco: is a drawing of DEC's M1705B with blue wires.
M1705X: is a'modernized' drawing of DEC's M1705.
M1705Xeco: is a drawing of DEC's M1705X with blue wires.

./DEC/Mxxx/M171: 2-2-2-3 AND-NOR, 3 circuits, different pins than M127

./DEC/Mxxx/M1713: 16 to 1 MUX inverting, 74150, 50-08908 etch

M1713A: is a drawing of DEC's M1713A.
M1713X: is a 'modernized' M1713.

./DEC/Mxxx/M172: 2 En x 9 out mixer, 74H50, for KI10

./DEC/Mxxx/M173: Non-inverting M143

./DEC/Mxxx/M174: 4 En x 9 out mixer, 74H53s, KI10

./DEC/Mxxx/M175: 7 3-input AND gates, 74H, KI10

./DEC/Mxxx/M177: Non-inverting M147

./DEC/Mxxx/M178: 8 En x 6 out mixer, 74H53, 74H62, KI10

./DEC/Mxxx/M181: Non-inverting M171

./DEC/Mxxx/M182: M162 with fast ICs, 74H

M182A: is a drawing of DEC's M182A.
M182B: is a drawing of DEC's M182B.
M182X: is a 'modernized' M182.

./DEC/Mxxx/M190: 4 ARITHMETIC LOGIC, IN & OUT BUFFERS, SN74181, USED IN FPP12

./DEC/Mxxx/M191: 2 Look-ahead elements (74182), uses W961 board, used with M190 or M159 (board 50-08912)

M191C: is a drawing of DEC's M191C.
M191X: is a 'modernized' M191.

./DEC/Mxxx/M192: 2 8-INPUT PRIORITY ENCODERS, 9318 IC, 50-08912 BOARD

./DEC/Mxxx/M202: Triple J-K Flip Flop

M202B: is a drawing of DEC's M202B.
M202X: is a 'modernized' M202.

./DEC/Mxxx/M203: 8 Set-Reset Flip Flops

M203B: is a drawing of DEC's M203B.
M203X: is a 'modernized' M203.

./DEC/Mxxx/M204: Counter Buffer

M204D: is a drawing of DEC's M204D.
M204X: is a 'modernized' M204.

./DEC/Mxxx/M205: 5 D Flip Flops

M205A: is a drawing of DEC's M205A.
M205X: is a 'modernized' M205.

./DEC/Mxxx/M206: 6 D Flip-Flops with 2 jumpers for clear

M206B: needs a drawing.
M206C: is an Eagle version of DEC's M206C Flip-Flop module.
M206D: needs a drawing.
M206X: is a 'modernized' M206.

./DEC/Mxxx/M207: 6 J-K Flip-Flops

M207C: is a drawing of DEC's M207C.
M207D: needs a drawing.
M207E: is a drawing of DEC's M207E.
M207X: is a 'modernized' M207.

./DEC/Mxxx/M208: Buffer/Shift Register

M208C: is a drawing of DEC's M208C.
M208X: is a 'modernized' M208.

./DEC/Mxxx/M211: 6-bit Up/down counter

./DEC/Mxxx/M212: 6 Bit L-R Shift Register

M212B: is a drawing of DEC's M212B.
M212X: is a 'modernized' M212.

./DEC/Mxxx/M213: BCD Up/Down Counter

./DEC/Mxxx/M214: 6-bit Accumulator with 3 inputs

M214A: is a drawing of DEC's M214A.
M214X: is a 'modernized' M214.

./DEC/Mxxx/M215: 4 Bits of 3 Registers, Adder per Bit

M215A: is a drawing of DEC's M215A.
M215X: is a 'modernized' M215.

./DEC/Mxxx/M216: 6 D Flip-Flops

M216B: is a drawing of DEC's M216C.
M216X: is a 'modernized' M216.

./DEC/Mxxx/M217: Clock register for PDP-12, 4 bit counter with buffer register for preset or readout

M217A: is a drawing of DEC's M217A.
M217X: is a 'modernized' M217.

./DEC/Mxxx/M218: Bi-directional shift register, 9 bits, 2 parallel loads

M218A: is a drawing of DEC's M218A.
M218X: is a 'modernized' M218.

./DEC/Mxxx/M219: 7-bit synchronous counter with jam and clear presets

M219B: is a drawing of DEC's M219B.
M219X: is a 'modernized' M219.

./DEC/Mxxx/M220: Major Registers, double

M220A: is a drawing of DEC's M220A.
M220B: is a drawing of DEC's M220B.
M220C: is a drawing of DEC's M220C.
M220new: is an implementation that doesn't use the hard to find 7453 and 7482 chips.
M220pal: is a PAL implementation, using 22V10 programed with m220pgm1.pds and m220pgm2.pds.
M220p16: is a PAL implementation, using 16V8 programed with m220a.pds, m220b.pds, and m220c.pds.
M220at: is a PLD implementation, using ATF1508.
M220xc: is a PLD implementation, using XC9536XL programed with m220a.v, m220b.v, and m220c.v.
M220X: is a 'modernized' M220 (using 16V8).

./DEC/Mxxx/M221: Register for PDP-12 (M220 plus extra logic), Double

M221D: is a drawing of DEC's M221D.
M221X: is a 'modernized' M221.

./DEC/Mxxx/M222: Tape register for PDP-12, 2 bits, 6 registers, Double

M222B: is a drawing of DEC's M222B.
M222X: is a 'modernized' M222.

./DEC/Mxxx/M223: MA,/MB Registers

M223B: is a drawing of DEC's M223B.
M223X: is a 'modernized' M223.

./DEC/Mxxx/M224: Data Paths (double, long)

M224B: is a drawing of DEC's M224B.
M224X: is a 'modernized' M224.

./DEC/Mxxx/M225: 16x16 Memory (double, long)

M225A: is a drawing of DEC's M225A.
M225X: is a 'modernized' M225.

./DEC/Mxxx/M226: 1 Bit, all registers (except ACC) for PDP-15

M226A: is a drawing of DEC's M226A.
M226X: is a 'modernized' M226.

./DEC/Mxxx/M227: Accumulator for PDP-15, 9 bits

M227B: is a drawing of DEC's M227B.
M227X: is a 'modernized' M227.

./DEC/Mxxx/M228: Mark Track Decoder

M228A: is a drawing of DEC's M228A.
M228X: is a 'modernized' M228.

./DEC/Mxxx/M230: Binary to BCD and BCD to Binary Converter, double

./DEC/Mxxx/M231: DUAL 12 BIT PRESETTABLE REPEATABLE COUNTER, DOUBLE, USED IN AIP12

./DEC/Mxxx/M232: 16x1 RAM

./DEC/Mxxx/M233: Disk Shift Register

./DEC/Mxxx/M236: 12 Bit Binary Up/Down Counter, 8931 etch

M236B: is a drawing of DEC's M236B.
M236X: is a 'modernized' M236.

./DEC/Mxxx/M237: 3 Digit BCD Up/Down Counter

./DEC/Mxxx/M238: 2 4-bit Synchronous up/down counters with parallel load, separate up & down clocks, board etch 50-08912

M238D: is a drawing of DEC's M238D.
M238X: is a 'modernized' M238.

./DEC/Mxxx/M239: 3-4 Bit Counter/Registers

M239A: is a drawing of DEC's M239A.
M239X: is a 'modernized' M239.

./DEC/Mxxx/M240: 6 R/S Flip Flops

M240B: is a drawing of DEC's M240B.
M240X: is a 'modernized' M240.

./DEC/Mxxx/M241: 6 D Flip-flops (74H74) with common clock

./DEC/Mxxx/M242: H version of M202

M242A: is a drawing of DEC's M242A.
M242X: is a 'modernized' M242.

./DEC/Mxxx/M243: 8 D Flip-flops (74H74) with 2 common clocks, 4 bits each

./DEC/Mxxx/M245: Dual 4 Bit Shift Register

./DEC/Mxxx/M246: 5 D flip-flops, all pins available (74H74)

M246A: is a drawing of DEC's M246A.
M246X: is a 'modernized' M246.

./DEC/Mxxx/M247: 6 RS flip-flops, clocked to 6 D flip-flops

./DEC/Mxxx/M248: 8-bit Shift right, parallel load, 50-08914 etch, 7495

M248B: is a drawing of DEC's M248B.
M248X: is a 'modernized' M248.

./DEC/Mxxx/M250: 16 Words, 4-bit memory (F9035), KI10

./DEC/Mxxx/M2500: 2 64-Word, 4-Bit MOS Memories, 08912 etch

M2500D: is a drawing of DEC's M2500D.
M2500X: is a 'modernized' M2500.

./DEC/Mxxx/M253: 16 Words, 12-bit memory (TI 7489)

M253B: is a drawing of DEC's M253B.
M253X: is a 'modernized' M253.

./DEC/Mxxx/M260: Associative memory, 4x12, KI10, Fairchild 4102 IC, 35ns match time

./DEC/Mxxx/M261: 4-State Motor Translator

./DEC/Mxxx/M262: 10-State Motor Translator, double

./DEC/Mxxx/M302: One Shot Delay

M302D: is a drawing of DEC's M302D.
M302K: is a drawing of DEC's M302K.
M302X: is a 'modernized' M302.

./DEC/Mxxx/M3020: 2 One Shot Delays with Hysteresis

M3020A: is a drawing of DEC's M3020A.
M3020X: is a 'modernized' M3020.

./DEC/Mxxx/M304: One Shot Delay

M304A: is a drawing of DEC's M304A.
M304B: is a drawing of DEC's M304B.
M304X: is a 'modernized' M304.

./DEC/Mxxx/M306: Integrating One Shot

M306B: is a drawing of DEC's M306B.
M306X: is a 'modernized' M306.

./DEC/Mxxx/M307: Integrating One Shot

M307-9601: is DEC's M307 Integrating One Shot module, with the now hard to find 9601 monostables.
M307: is a version of the M307 using the more readily available 74123 instead of the 9601.
M307A: is a drawing of DEC's M307A.
M307B: is a drawing of DEC's M307B.
M307X: is a 'modernized' M307.

./DEC/Mxxx/M3070: Dual integrating one-shot 200ns to 20ms in 5 steps

./DEC/Mxxx/M308: Integrating one-shot, edge or pulse triggered, clock, power up & down

./DEC/Mxxx/M310: Delay Line

M310A: is a drawing of DEC's M310A.
M310B: is a drawing of DEC's M310B.

./DEC/Mxxx/M311: Tapped Delay Lines

M311A: is a drawing of DEC's M311A.

./DEC/Mxxx/M312: Delay Module

M312B: is a drawing of DEC's M312B.
M312C: is a drawing of DEC's M312C.

./DEC/Mxxx/M321: M311 except one delay line, one output buffer can drive 30 TTL H loads

./DEC/Mxxx/M360: Variable Delay

M360: is a replacement for DEC's M360 Variable Delay, based in part on the MM360, by Dave Brockman.
M360B: is a drawing of DEC's M360B.

./DEC/Mxxx/M362: Delay, 25 to 50 ns

./DEC/Mxxx/M363: Delay, 15 to 30 ns, inverts

./DEC/Mxxx/M401: Variable Clock

M401B: is a drawing of DEC's M401B.
M401C: needs a drawing. M401H is a drawing of DEC's M401H.
M401L: needs a drawing. M401M is a drawing of DEC's M401M.
M401X: is a 'modernized' M401.

./DEC/Mxxx/M402: Remotely variable clock, Uses 5V photomod, 2Hz to 1MHz

M402B: is a drawing of DEC's M402B.
M402X: is a 'modernized' M402.

./DEC/Mxxx/M403: RC Multivibrator Clock

./DEC/Mxxx/M404: Crystal Clock

./DEC/Mxxx/M405: Crystal Clock, positive and negative pulse outputs, 5KHz to 10MHz

M405A: is a drawing of DEC's M405A.
M405B: is a drawing of DEC's M405B.
M405X: is a 'modernized' M405.

./DEC/Mxxx/M410: Resonant Reed Clock

M410A: is a drawing of DEC's M410A.

./DEC/Mxxx/M415: 20 MHZ XTAL CLOCK

./DEC/Mxxx/M420: Phase Lock Clock, RP09, RP15, double

M420C: is a drawing of DEC's M420C.
M420X: is a 'modernized' M420.

./DEC/Mxxx/M4201: Phase Lock Clock

M4201C: needs a drawing.

./DEC/Mxxx/M452: Variable Clock

M452A: is a drawing of DEC's M452A.
M452X: is a 'modernized' M452.

./DEC/Mxxx/M453: Variable Clock

M453A: is a drawing of DEC's M453A.
M453X: is a 'modernized' M453.

./DEC/Mxxx/M455: VARIABLE CLOCK, 2 RANGES, 4 - 20 MS, 0.4 - 2 MS, BY JUMPER

./DEC/Mxxx/M500: Negative Input Converter

M500A: is a drawing of DEC's M500A.
M500B: is a drawing of DEC's M500B.
M500X: is a 'modernized' M500.

./DEC/Mxxx/M501: Schmitt Trigger

M501B: is a drawing of DEC's M501B.
M501X: is a 'modernized' M501.

./DEC/Mxxx/M502: Negative Input Converter

M502A: is a drawing of DEC's M502A.
M502B: is a drawing of DEC's M502B.
M502X: is a 'modernized' M502.

./DEC/Mxxx/M503: Differential Schmitt, 2 channels, pulse amplifier in each

M503A: is a drawing of DEC's M503A.
M503X: is a 'modernized' M503.

./DEC/Mxxx/M506: Negative Input Converter, 6 channels, 0 and -3V in

M506C: is a drawing of DEC's M506C.
M506X: is a 'modernized' M506.

./DEC/Mxxx/M507: Bus Converter

M507A: is a drawing of DEC's M507A.
M507X: is a 'modernized' M507.

./DEC/Mxxx/M508: Negative bus to positive bus converter, 6 circuits, open collector outputs, GND in = positive out

./DEC/Mxxx/M510: I/O Bus Receiver

M510A: is a drawing of DEC's M510A.
M510X: is a 'modernized' M510.

./DEC/Mxxx/M511: Unibus Receiver, 15 circuits, 4 GND, DS11, DL10

./DEC/Mxxx/M514: TU10 Transceiver (for connection to TC58, TC59, & TM10), see M519, double

M514H: is a drawing of DEC's M514H.
M514X: is a 'modernized' M514.

./DEC/Mxxx/M515: Real Time Clock, 12VAC input on tabs, uses +11V & +5V

M515C: is a drawing of DEC's M515C.
M515X: is a 'modernized' M515.

./DEC/Mxxx/M516: Hex Positive Bus Receiver

M516A: is a drawing of DEC's M516A.
M516X: is a 'modernized' M516.

./DEC/Mxxx/M517: M507 with an enable input

./DEC/Mxxx/M518: 3 DIFFERENTIAL SCHMITTS & 8 BIT INPUT REGISTER \(A503 CKTS\), OS8-EA

./DEC/Mxxx/M519: TU10-C,-D BUS TRANSCEIVER, SEE M514

./DEC/Mxxx/M521: K to M Converter

./DEC/Mxxx/M531: 8 channel Negative Bus Receiver with noise filtering (M500 pins)

./DEC/Mxxx/M564: I/O Bus Receiver, 8 circuits, negative bus, positive logic, light input load

./DEC/Mxxx/M565: Memory Bus Receiver, 8 circuits, negative bus, positive logic

./DEC/Mxxx/M592: I/O Device Select (used with M71000)10 74H ICs

./DEC/Mxxx/M5921: Bus Transceiver

M5921A: is a drawing of DEC's M5921A.
M5921X: is a 'modernized' M5921.

./DEC/Mxxx/M594: EIA Level Converter (long)

M594B: is a drawing of DEC's M594B.
M594X: is a 'modernized' M594.

./DEC/Mxxx/M5940: 8 channel EIA-CCITT to DEC, 7 DEC to EIA-CCITT, DF11-A, 1V hysteresis, 5" version

./DEC/Mxxx/M597: 6 Channel IBM Receiver

M597D: is a drawing of DEC's M597D.

./DEC/Mxxx/M602: Pulse Amplifier

M602A: is a drawing of DEC's M602A.
M602X: is a 'modernized' M602.

./DEC/Mxxx/M603: 2 Pulse Amplifiers, negative edge in, 1 positive 60ns & 1 positive 45-100ns out, 4 2-input NANDs (74H00), 3 3-input ANDs (74H11)

./DEC/Mxxx/M606: Pulse Generator

M606A: is a drawing of DEC's M606A.
M606B: is a drawing of DEC's M606B.
M606X: is a 'modernized' M606.

./DEC/Mxxx/M610: 6 Open Collector 2-Input NAND Gates + Pulse Amplifier

./DEC/Mxxx/M611: High Speed Power Inverter

M611A: is a drawing of DEC's M611A.
M611B: is a drawing of DEC's M611B.
M611X: is a 'modernized' M611.

./DEC/Mxxx/M612: 6 Power Gates, 6 grounds, 5 inputs per gate pair

./DEC/Mxxx/M617: 6-4 Input NOR Buffers

M617B: is a drawing of DEC's M617B.
M617C: is a drawing of DEC's M617C.
M617E: is a drawing of DEC's M617E.
M617X: is a 'modernized' M617.

./DEC/Mxxx/M621: Bus Driver, 6 circuits, enables for each of 2 6-bit words

M621A: is a drawing of DEC's M621A.
M621X: is a 'modernized' M621.

./DEC/Mxxx/M622: Bus Drivers

M622A: is a drawing of DEC's M622A.
M622X: is a 'modernized' M622.

./DEC/Mxxx/M623: Bus Drivers

M623A: is a drawing of DEC's M623A.
M623E: is a drawing of DEC's M623E.
M623X: is a 'modernized' M623.

./DEC/Mxxx/M624: Bus Drivers

M624A: is a drawing of DEC's M624A.
M624X: is a 'modernized' M624.

./DEC/Mxxx/M627: Power Amplifier Module

M627A: is a drawing of DEC's M627A.
M627C: is a drawing of DEC's M627C.
M627E: is a drawing of DEC's M627E.
M627X: is a 'modernized' M627.

./DEC/Mxxx/M628: 2 switches, 2 bit adder, 1 M621 type driver, for MX15

M628A: is a drawing of DEC's M628A.
M628X: is a 'modernized' M628.

./DEC/Mxxx/M629: Bus Driver, 11 circuits, for positive bus, PDP11, 8881's

./DEC/Mxxx/M632: Positive Input Converter Drivers

M632B: is a drawing of DEC's M632B.
M632X: is a 'modernized' M632.

./DEC/Mxxx/M633: Negative Bus Driver

M633B: is a drawing of DEC's M633B.
M633X: is a 'modernized' M633.

./DEC/Mxxx/M640: Master Interface Bus Driver, double

M640C: is a drawing of DEC's M640C.
M640X: is a 'modernized' M640.

./DEC/Mxxx/M650: Negative output converter, 3 channels, R650 type outputs

M650D: is a drawing of DEC's M650D.
M650X: is a 'modernized' M650.

./DEC/Mxxx/M651: M650 with outputs clamped to ground when 5V goes away

M651C: is a drawing of DEC's M651C.
M651X: is a 'modernized' M651.

./DEC/Mxxx/M652: Negative Output Converters

M652A: is a drawing of DEC's M652A.
M652X: is a 'modernized' M652.

./DEC/Mxxx/M660: Positive Level Drivers

M660A: is a drawing of DEC's M660A.
M660B: is a drawing of DEC's M660B.
M660X: is a 'modernized' M660.

./DEC/Mxxx/M661: Positive Level Driver for 8/I bus, 3 circuits, output clamped to +3V, M660 pins

M661A: is a drawing of DEC's M661A.
M661X: is a 'modernized' M661.

./DEC/Mxxx/M662: 6 CKTS, NON-INY BUS DRIVERS FOR KVGS \(VT02\), 6 US RISE & FALL INTO OPEN LINE

./DEC/Mxxx/M663: 3 negative Memory Bus Drivers, positive input, 50 ohm load, KI10

./DEC/Mxxx/M664: I/O Bus Driver, 0 to +3V in, 0 to -3V out, 8 circuits

./DEC/Mxxx/M665: Memory Bus Driver, 0 to +3V in, 0 to -3V out, 8 circuits

./DEC/Mxxx/M666: I/O Bus Reset, 12 outputs, 20mA@-3V, 1/3 duty factor max

./DEC/Mxxx/M671: M to K Converter

./DEC/Mxxx/M688: Unibus Power Fail Drivers

M688B: is a drawing of DEC's M688B.
M688X: is a 'modernized' M688.

./DEC/Mxxx/M697: 4 Channel IBM Transmitter

M697D: is a drawing of DEC's M697D.

./DEC/Mxxx/M700: Manual Timing Generator, double

M700A: is a drawing of DEC's M700A.
M700B: is a drawing of DEC's M700B.
M700E: is a drawing of DEC's M700E.
M700X: is a 'modernized' M700.

./DEC/Mxxx/M701: Display Control, VC8/I, double

M701D: is a drawing of DEC's M701D.
M701X: is a 'modernized' M701.

./DEC/Mxxx/M7010: VV15 Timing and Control (double, long)

M7010B: is a drawing of DEC's M7010B.
M7010X: is a'modernized' drawing of DEC's M7010.

./DEC/Mxxx/M7011: Serial Transmitter

./DEC/Mxxx/M7015: UNIBUS INTERFACE FOR LPS, QUAD 8.5

./DEC/Mxxx/M7016: PROGRAMMABLE REAL TIME CLOCK W 3 SCHMITT TRIGGERS, LPSKW, QUAD 8.5

./DEC/Mxxx/M7017: DIGITAL I/O, 16 BITS, TTL LEVELS, SIMILAR TO M863, LPSDR, QUAD 8.5

./DEC/Mxxx/M7018: A/D CONTROL, PART OF LPSAD-12, LPSAD-15, USED WITH A804, A865, A406, DOUBLE 8.5

./DEC/Mxxx/M7019: DISPLAY CONT, PART OF LPSVC, COLOR TUBE, STORAGE TUBE & PLOTTER CAPABILITY, DOUBLE 8.5

./DEC/Mxxx/M7020: LPSAD-NP, NPR CONTROL FOR LPSAO, DOUBLE 8.5

./DEC/Mxxx/M7023: DIGITAL I/O, 16 BITS, LATCH CHOICE, INTERRUPT ON ANY INPUT BIT, LPSDR-A, QUAD

./DEC/Mxxx/M7024: VT55 GRAPHING CONTROL MODULE, HEX, NO GOLD ON FINGERS

./DEC/Mxxx/M703: Power Fail Logic, 8/I

M703E: is a drawing of DEC's M703E.
M703X: is a 'modernized' M703.

./DEC/Mxxx/M704: Plotter Control, 8/I

./DEC/Mxxx/M705: Reader Control, double

M705D: is a drawing of DEC's M705D.
M705J: is a drawing of DEC's M705J.
M705X: is a 'modernized' M705.

./DEC/Mxxx/M7050: Reader Control with feed hole strobe & feed hole transition out-of-tape sense, Double

M7050C: is a version of DEC's M7050C.
M7050D: is a version of DEC's M7050D.
M7050E: is a version of DEC's M7050E.
M7050X: is a'modernized' drawing of DEC's M7050.

./DEC/Mxxx/M706: Teletype Receiver, double

M706D: is a drawing of DEC's M706D.
M706H: is a drawing of DEC's M706H.
M706K: is a drawing of DEC's M706K.
M706O: is a drawing of DEC's M706O.
M706X: is a 'modernized' version of DEC's M706K.

./DEC/Mxxx/M7065: Synchronous Receiver (long)

M7065C: is a version of DEC's M7065C.
M7065X: is a'modernized' drawing of DEC's M7065.

./DEC/Mxxx/M707: Teletype Transmitter, double

M707A: is a drawing of M707 etch A with a resistor in SERIAL OUT, like M707D.
M707C: is a drawing of M707 etch C.
M707C+: is a drawing of M707 etch C with a resistor in SERIAL OUT, like M707D.
M707D: is a drawing of M707 etch D.
M707X: is a 'modernized' version of M707D.

./DEC/Mxxx/M7075: Synchronous Transmitter (long)

M7075C: is a version of DEC's M7075C.
M7075X: is a'modernized' drawing of DEC's M7075.

./DEC/Mxxx/M708: Clock Control, 8/I

M708A: needs a drawing.
M708B: is an Eagle version of DEC's M708B.
M708C: needs a drawing.
M708X: is an modernized version of DEC's M708B with unused inputs tied high.

./DEC/Mxxx/M709: Clock Counter, 8/I

M709A: needs a drawing.
M709B: is an Eagle version of DEC's M709B.
M709X: is an Eagle version of DEC's M709X.

./DEC/Mxxx/M710: Punch control, double

M710B: is a drawing of DEC's M710B.
M710F: needs a drawing.
M710H: is a drawing of DEC's M710H.
M710X: is a 'modernized' M710H.

./DEC/Mxxx/M7100: I/O Device Control, used with M592, 10 74H ICs

./DEC/Mxxx/M7101: Control

M7101F: needs a drawing.

./DEC/Mxxx/M7102: Positive I/O Bus Converter

M7102: is a drawing of DEC's M7102 Positive I/O Bus Converter Board.

./DEC/Mxxx/M7103: Negative I/O Bus Converter

M7103: is a drawing of DEC's M7103 Negative I/O Bus Converter Board.

./DEC/Mxxx/M7104: RK8E Data Buffer and Status

M7104B: is a drawing of DEC's M7104B RK8E Data Buffer and Status Board.

./DEC/Mxxx/M7105: RK8E Major Registers

M7105B: is a drawing of DEC's M7105B RK8E Major Registers Board.

./DEC/Mxxx/M7106: RK8E Control

M7106C: is a drawing of DEC's M7106C RK8E Control Board.

./DEC/Mxxx/M711: Scope Control, PDP-12

./DEC/Mxxx/M712: Control Logic I, CR8-I, CR8-L

./DEC/Mxxx/M713: MULTIPLEX INTERFACE FOR KV8/I

./DEC/Mxxx/M714: Control Logic I, CR8-I, CR8-L

./DEC/Mxxx/M715: Reader Clock, double

M715A: needs a drawing.
M715E: needs a drawing.
M715F: is a drawing of DEC's M715F Reader Clock module.
M715X: is a 'modernized' drawing of DEC's M715F.

./DEC/Mxxx/M716: Control Logic II, CR8-I, CR8-L

./DEC/Mxxx/M717: Display Control, VP09, VP15

M717A: needs a drawing.

./DEC/Mxxx/M719: Clock Sync & Decade Counter, KW12

./DEC/Mxxx/M720: Memory Detection

M720: is DEC's M720 Memory Detection board.
M720db: is a version using monostables, based on the MM720 by Dave Brockman.

./DEC/Mxxx/M7212: Bus Repeater (long)

M7212C: needs a drawing.

./DEC/Mxxx/M7219: RC11 Bus Interface (quad)

M7219D: needs a drawing.

./DEC/Mxxx/M7220: RC11 Clock Control (long)

M7220B: needs a drawing.

./DEC/Mxxx/M7221: RC11 Disk Interface (quad)

M7221D: needs a drawing.
M7221E: needs a drawing.

./DEC/Mxxx/M7222: RC11 Status Control (quad)

M7222E: needs a drawing.

./DEC/Mxxx/M7224: RC11 Unit and Track Selector (long)

M7224B: needs a drawing.

./DEC/Mxxx/M7225:

M7225B: needs a drawing.

./DEC/Mxxx/M724: Bus and Console Control (quad, long)

M724C: needs a drawing.

./DEC/Mxxx/M7246: Modem Control Scan (double, long)

M7246H: needs a drawing.

./DEC/Mxxx/M725: Bus Interface and IR (quad, long)

M725B: needs a drawing.

./DEC/Mxxx/M726: IR Decode (quad, long)

M726B: needs a drawing.

./DEC/Mxxx/M727: State Control (quad, long)

M727C: needs a drawing.

./DEC/Mxxx/M728: Timing and States (quad, long)

M728D: needs a drawing.

./DEC/Mxxx/M7290: Control Logic (double, long)

M7290C: needs a drawing.

./DEC/Mxxx/M730: Positive Output Bus Interface

M730A: needs a drawing.

./DEC/Mxxx/M7300: PDP16 GPA CONTROL, GEN PURPOSE ARITHMETIC UNIT, 4 4-BIT BYTES, USED WITH M7301'S, DOU6LE X 8.5,KAC16

./DEC/Mxxx/M7301: PDP16 GPA REGISTER, GEN PURPOSE ARITH UNIT REGISTERS, 4 4-BIT BYTES, DOUBLE X 8.5, KAR16

./DEC/Mxxx/M7305: PDP16 TRANSFER REGISTER, PROVIDES 16 BIT DATA STORAGE, MASKING & BYTE CONTROL, MS16-A

./DEC/Mxxx/M7306: PDP16 FLAG MODULE, 3 SINGLE BIT STORAGE AND CONTROL, KFL16, SINGLE X 8.5

./DEC/Mxxx/M7307: PDP16 CONSTANTS REGISTER, SMALL ROM, MR16-A, DOUBLE X 8.5

./DEC/Mxxx/M731: Negative Output Bus Interface

./DEC/Mxxx/M732: Positive Input Bus Interface

./DEC/Mxxx/M733: Negative Input Bus Interface

./DEC/Mxxx/M734: Input/Output Bus Multiplexer

./DEC/Mxxx/M7341: MPS Processor Module, quad

M7341E: needs a drawing.

./DEC/Mxxx/M7344: MPS Read/Write Memory Module, quad

M7344CYA: needs a drawing.

./DEC/Mxxx/M7345: MPS 4Kx8 Read Only Memory Module, quad

M7345C: needs a drawing.

./DEC/Mxxx/M7346: MPS External Event Detection Module, extended single

M7346B: needs a drawing.

./DEC/Mxxx/M7347: MPS Reader Run

M7347B: is a drawing of DEC's M7347B, with guesses as to the chips used.

./DEC/Mxxx/M735: Input/Output Bus Transfer Register

./DEC/Mxxx/M736: Priority Interrupt Module

./DEC/Mxxx/M737: 12-Bit Bus Receiver Interface

./DEC/Mxxx/M738: Counter-Buffer Interface

./DEC/Mxxx/M7390: Asynchronous Transceiver, extended double

M7390D: needs a drawing.

./DEC/Mxxx/M750: Line I/O Control, equivalent to 2 W750s

./DEC/Mxxx/M751: Line Register & R Register for DC08A, I/O Bus Connection

./DEC/Mxxx/M752: Instruction Decoder & Gates for DC08A

./DEC/Mxxx/M753: Control for 2 Data Set Lines in DC08F

./DEC/Mxxx/M760: A/D CONTROL FOR PDP-12, POSSIBLE GENERAL APPLICATION

./DEC/Mxxx/M761: 32 to 8 Bit Multiplexer (double)

M761A: needs a drawing.

./DEC/Mxxx/M762: ROM Diode Matrix Receiver (double)

M762A: needs a drawing.

./DEC/Mxxx/M763: 9 Track Write Buffer for TU10, negative logic, see M893, double

M763C: needs a drawing.
M763D: needs a drawing.

./DEC/Mxxx/M765: 9 Track Read Buffer for TU10, double

M765A: needs a drawing.
M765B: needs a drawing.

./DEC/Mxxx/M767: Clock and Skew Delay

M767A: needs a drawing.
M767C: needs a drawing.

./DEC/Mxxx/M7670: Forward BOT Timer, TU10

./DEC/Mxxx/M7671: Master Slave Bus Driver, TU10, Double

./DEC/Mxxx/M7672: TU10 Command Buffers, Double

M7672: is a drawing of DEC's M7672 TU10 Command Buffers board, including the hard to find 8202 chip.
M7672n: is a drawing of DEC's M7672 TU10 Command Buffers board with the 8202 replaced with a 74821 chip.

./DEC/Mxxx/M7673: Data Checker, TU10, Double

./DEC/Mxxx/M768: Delay Selector for TU10, with TC58, TC59, TM10, double

M768E: needs a drawing.

./DEC/Mxxx/M7687: Drive Data Interface (long)

M7687C: needs a drawing.

./DEC/Mxxx/M769: Function Control for TU10

M769F: needs a drawing.

./DEC/Mxxx/M770: EAE CONTROL FOR PDP-15

M770B: needs a drawing.

./DEC/Mxxx/M7700: SECTOR CTR, INDEX & PHOTOAMP FOR RK05, DOUBLE X 8.5

./DEC/Mxxx/M7701: CONTROL & SAFETY INTERLOCKS FOR RK05, DOUBLE X 8.5

./DEC/Mxxx/M7702: TRACK ADDRESS & DIFFERENCE CNTR FOR RK05, DOUBLE X 8.5

./DEC/Mxxx/M771: INTERNAL DEVICE DECODER FOR PDP-15

M771A: needs a drawing.

./DEC/Mxxx/M7710: Print Sequencer (double)

M7710F: needs a drawing.

./DEC/Mxxx/M7711: Control Logic A (double)

./DEC/Mxxx/M7712: Control Logic B (double)

M7712D: needs a drawing.
M7712F: needs a drawing.

./DEC/Mxxx/M7713: LCV (double)

M7713E: needs a drawing.

./DEC/Mxxx/M7714: CHARACTER GENERATOR, LA30, DOUBLE

./DEC/Mxxx/M7715: Line Feed Control

M7715C: needs a drawing.

./DEC/Mxxx/M7716: H550 Motor Translator

M7716B: needs a drawing.

./DEC/Mxxx/M7717: Motor Control

M7717C: needs a drawing.

./DEC/Mxxx/M7718: KEYBOARD INTERFACE, LA30, CONNECT TO 8/I, 8/L, 12, OR 15, PARALLEL \(CAN REPLACE M706\), DOUBLE

./DEC/Mxxx/M7719: TRANSMIT DATA TO LA30 PRINTER, PARALLEL, \(CAN REPLACE M707\), DOUBLE

./DEC/Mxxx/M772: CONSOLE CONTROL #1 FOR PDP-15

M772A: needs a drawing.

./DEC/Mxxx/M7721: Control Logic A (double)

M7721B: needs a drawing.

./DEC/Mxxx/M7722: LA36 MICROPROCESSOR, 10 X 15, NO FINGERS \(REPLACED BY M7723\)

./DEC/Mxxx/M7723: LA36 MICROPROCESSOR, REPLACEMENT FOR M7722, HAS TEST PADS, NO FINGERS, 10 X 15

./DEC/Mxxx/M7724: Character Generator ROM (double)

M7724B: needs a drawing.

./DEC/Mxxx/M7726: RX01 CONTROL

./DEC/Mxxx/M7727: RX01 READ/WRITE ELECTRONICS

./DEC/Mxxx/M773: CONSOLE CONTROL #2 FOR PDP-15

M773B: needs a drawing.

./DEC/Mxxx/M7731: SERIAL INTERFACE CONTROL, LA30

./DEC/Mxxx/M775: TIME STATE GENERATOR

M775B: needs a drawing.

./DEC/Mxxx/M7752: DESKEW LOGIC, RS03, DOUBLE X 8.5

./DEC/Mxxx/M7753: DATA BUFFER, RS03, DBL X 8.5, INCLUDES CRC

./DEC/Mxxx/M7754: ADDRESS REGISTER, RS03, DBL X 8.5

./DEC/Mxxx/M7755: CONTROL, RS03, DBL X 8.5

./DEC/Mxxx/M7756: ALTERNATE TRACK OPTION, RS03, DBL X 8.5

./DEC/Mxxx/M7757: RS04-TA \(TIMING TRACK WRITER\) QUAD 8.5

./DEC/Mxxx/M7759: COMMAND DECODE, DOUBLE 8.5

./DEC/Mxxx/M776: Reader Register, PC15, Double

M776A: needs a drawing.

./DEC/Mxxx/M7760: CASSETTE LOGIC, TU60, HEX 8.5, NO FINGERS

./DEC/Mxxx/M7761: CASSETTE SERVO & READ, TU60, HEX 8.5, NO FINGERS

./DEC/Mxxx/M7770: RS03 STATUS, DOUBLE 8.5

./DEC/Mxxx/M7771: RS03 FORMAT, DOUBLE 8.5

./DEC/Mxxx/M7777: RP04 MDLI \(MIN DEVICE LEVEL INTERFACE\) TRANSMITTER, DOUBLE 8.5

./DEC/Mxxx/M7778: RP04 MDLI RECEIVER, DOUBLE 8.5

./DEC/Mxxx/M780: TTY Transmitter & Receiver, 110 baud (double, long)

M780A: needs a drawing.

./DEC/Mxxx/M7800: DL11 Asynch Interface (quad)

M7800A: needs a drawing.

./DEC/Mxxx/M782: Interrupt Control (long)

M782E: needs a drawing.

./DEC/Mxxx/M7820: Interrupt Control, 7 bits, 1 per PDP11 peripheral, Replaced by M7821, extended single

./DEC/Mxxx/M7821: Interrupt Control, 7 bits, 1 per PDP11 peripheral, Faster M7820, extended single

M7821: is a drawing of DEC's M7821 Interrupt Control board.
M7821B: needs a drawing.
M7821D: needs a drawing.

./DEC/Mxxx/M783: Unibus/Omnibus Drivers, extended single

M783B: needs a drawing.
M783bad: is a version of the M783 that won't work.
M783: is basically DEC's version of the M783 Bus Drivers module, using the now hard to find DS8881.
M783new: is a version of DEC's M783 Bus Drivers module using the AM26S10 instead of the DS8881.

./DEC/Mxxx/M784: Unibus/Omnibus Receivers, extended single

M784C: needs a drawing.
M784bad: is a version of the M784 that won't work.
M784: is basically DEC's version of the M784 Bus Receivers module, using the now hard to find SP380.
M784new: is a version of DEC's M784 Bus Receivers module using the AM26S10 instead of the SP380.

./DEC/Mxxx/M7846: RX01 UNIBUS INTERFACE, QUAD

./DEC/Mxxx/M785: Unibus/Omnibus Transceiver, extended single

M785B: needs a drawing.
M785dec: is an Eagle drawing of DEC's M785 Unibus/Omnibus Tranceiver board using the hard to find DS8881 and SP380 chips..
M785: is a version of DEC's M785 Unibus/Omnibus Tranceiver board with the hard to find chips replaced with AM26S10.
M785-3116: is a version of DEC's M785 Unibus/Omnibus Tranceiver board with the hard to find chips replaced with 7438 and the (too) expensive TL3116.

./DEC/Mxxx/M786: Device Register Interface, extended double

./DEC/Mxxx/M792: ROM Diode Matrix (long)

M792D: needs a drawing.

./DEC/Mxxx/M795: Word Count and Bus Address Module, extended double

M795D: needs a drawing and a DEC schematic.

./DEC/Mxxx/M796: Unibus Master Control, extended single

M796C: needs a drawing and a DEC schematic.

./DEC/Mxxx/M797: Register Select

M797B: needs a drawing and a DEC schematic.

./DEC/Mxxx/M798: Unibus Drivers, extended single

M798B: needs a drawing.

./DEC/Mxxx/M820: Data Path Control (quad, long)

M820C: needs a drawing.

./DEC/Mxxx/M821: Register Control (double, long)

M821C: needs a drawing.

./DEC/Mxxx/M822: Flag Control (double, long)

M822A: needs a drawing.

./DEC/Mxxx/M823: Codes Data (long)

M823A: needs a drawing.

./DEC/Mxxx/M824: Priority (double, long)

M824C: needs a drawing.

./DEC/Mxxx/M825: Power Fail and Control (long)

M825C: needs a drawing.

./DEC/Mxxx/M8290: CR11 Card Reader Interface (Unibus)

./DEC/Mxxx/M8291: CR11 Card Reader Interface (Unibus)

./DEC/Mxxx/M830: MAJOR REGISTER FOR KK8-E

./DEC/Mxxx/M8300: KK8E Major Registers

M8300B: is a drawing of the DEC M300B (schematic revision E).

./DEC/Mxxx/M8302: LV01 CONT, LV8, QUAD 8.5

./DEC/Mxxx/M831: REGISTER CONTROL FOR KK8-E

./DEC/Mxxx/M8310: KK8E Major Register Control

M8310F: needs a drawing.

./DEC/Mxxx/M8311: 4K X 12 MOS RAM W ROM INTERFACE, QUAD \(MS8-AD\), USING 2102

./DEC/Mxxx/M8315: 1 HEX BOARD OMNIBUS CPU, 8/E INSTRUCTION SET

./DEC/Mxxx/M8316: OPTION BOARD #1, SLU, XTAL CLOCK, GP PARALLEL INTERFACE, FRONT PANEL CONTROL, DKC8-AA, HEX

./DEC/Mxxx/M8317: KM8A 8/A Option Board 2

M8317E: needs a drawing.

./DEC/Mxxx/M832: LOAD RESISTORS FOR BUS, 8/E

./DEC/Mxxx/M8320: KK8E Bus Loads

M8320D: needs a drawing.

./DEC/Mxxx/M8321: TM8·E OUTPUT CONTROL

./DEC/Mxxx/M8322: TM8-E CONTROL & BREAK

./DEC/Mxxx/M8323: TM8-E TRANSPORT STATUS CONTROL

./DEC/Mxxx/M8327: TM8-E REGISTERS

./DEC/Mxxx/M8328: BUF MEM CLAMP LOADS, SWITCHES & INDICATORS \(BM8-L\), QUAD

./DEC/Mxxx/M8329: LC8-E PARALLEL INTERFACE TO LA30-P, 8.5 X QUAD

./DEC/Mxxx/M833: KK8E Timing Generator (obsoleted by M8330)

M833D: needs a drawing.

./DEC/Mxxx/M8330: KK8E Timing Generator

M8330C: needs a drawing.
M8330D: needs a drawing.
M8330E: needs a drawing.
M8330F: needs a drawing.

./DEC/Mxxx/M8331: TA8E Cassette Interface

M8331B: needs a drawing.

./DEC/Mxxx/M8335: VT8E Keyboard/Printer Control

M8335B: needs a drawing.

./DEC/Mxxx/M8336: VT8-E FREQUENCY DIVIDER, QUAD 8.5

./DEC/Mxxx/M8337: VT8-E LINE BUFFER, QUAD 8.5

./DEC/Mxxx/M8340: KE8E Decoder and Step Counter

M8340F: needs a drawing.

./DEC/Mxxx/M8341: KE8E Multiplexers and Timing Generator

M8341D: needs a drawing.

./DEC/Mxxx/M8342: LS8-E PARALLEL CONT- WILL REPLACE M8329

./DEC/Mxxx/M8347: TIMING GENERATOR FOR 8/E W STOP CLOCK INPUT, CAN REPLACE M8330, QUAD 8.5 \(KM8-F\) \(ECO'D INTO M8330\)

./DEC/Mxxx/M8349: M8349 WITH ONLY 256 WORDS OF PROM

./DEC/Mxxx/M835: POSITIVE BUS INTERFACE CARD FOR PDP8-E

./DEC/Mxxx/M8350: KA8E Positive I/O Bus Interface

M8350C: needs a drawing.

./DEC/Mxxx/M8356: KEY OPTION, MATCHES KEYS TO MEM ADDRESS REGISTER & HALTS, QUAD

./DEC/Mxxx/M8357: RX01 OMNIBUS INTERFACE

./DEC/Mxxx/M836: DATA BREAK BUS INTERFACE CARD FOR PDPB-E

./DEC/Mxxx/M8360: FASTER M836, REPLACES M836, QUAD

./DEC/Mxxx/M8365: LA180 Interface, Omnibus (quad, extended)

M8365B: needs a drawing.

./DEC/Mxxx/M837: Omnibus Memory Extension and Timeshare Option

M837: is a drawing of DEC's M837 Omnibus Timeshare Option board, which uses a lot of hard to find chips. M837bb is a version of M837 with the signals renamed to match their function. M837cc is a variant without the the TP_CB1 input.

./DEC/Mxxx/M839: SYNC MODE INTERFACE CARD FOR DP8-E

./DEC/Mxxx/M840: PC8E High Speed Reader/Punch Control (Omnibus)

M840K: is a drawing of DEC's M840K (PC8E).
M840X: is a drawing of a 'modernized' M840 (PC8E).

./DEC/Mxxx/M841: LE8-C, DATA PRODUCTS LINE PRINTER CONTROL, LP8-E

./DEC/Mxxx/M8416: KT8A 128K Memory Management Board

M8416C: needs a drawing.
M8416P: is M8416C with logic loops replaced with latches.
M8416V1: is M8416P trimmed to fit within a single ATF1508 CPLD.

./DEC/Mxxx/M842: XY8E Plotter Control (Omnibus)

M843E: needs a drawing.

./DEC/Mxxx/M843: CR8E Card Reader Control (Omnibus)

M843E: needs a drawing.

./DEC/Mxxx/M847: MI8E Diode Bootstrap Loader

M847: is a drawing of DEC's M847 Diode bootstrap loader.

./DEC/Mxxx/M848: POWER FAIL DETECT & AUTO RESTART, 8-E, QUAD

./DEC/Mxxx/M8480: IMPROVED M848, USED ONLY WITH M8330

./DEC/Mxxx/M849: RFI SHIELD, 8-E, QUAD

./DEC/Mxxx/M850: EIA Converter and Cable Connector

M850A: is a drawing of DEC's M850A EIA Connector card.
M850x: is a design for a version of the M850 EIA Connector card with input flow control implemented.

./DEC/Mxxx/M851: Bus Receiver - Address Decoder (double)

M851E: needs a drawing.

./DEC/Mxxx/M860: REAL TIME CLOCK, DK8-EF, 8-E, QUAD

./DEC/Mxxx/M863: 12 CH DIGITAL I/O \(DR8-EA\)

./DEC/Mxxx/M865: KL8E Terminal Control (Obsoleted by M8650)

M865C: is a drawing of the M865D schematic on the C etch.

./DEC/Mxxx/M8650: KL8E Terminal Control

M8650B: needs a drawing.
M8650C: needs a drawing.
M8650D: needs a drawing.
M8650D+eco: is a drawing of DEC's M8650 schematic rev. E on D etch.
M8650D+vrs: is a drawing of DEC's M8650 schematic rev. E with EIA RTS.
M8650D-ka: needs a drawing.

./DEC/Mxxx/M8652: KL8F Terminal Control

M8652B: needs a drawing.

./DEC/Mxxx/M8653: MODEM CONTROL, KL8-M

./DEC/Mxxx/M8655: KL8J Terminal Control

M8655B: needs a drawing.

./DEC/Mxxx/M866: EIA LEVEL CONVERTERS FOR M839 \(DP8-E\)

./DEC/Mxxx/M868: TD8E Simple DECtape Controller

M868H: is an Eagle version of DEC's M868 (ECO Rev. K) Simple Dectape Controller.
M868Hcjl: is a version of M868Hl with an SDLD bug fix described by Charles Lasner.
M868Hvrs1: is a version of M868Hl with an SDLD bug with easier mods.
M868Hvrs2: is another version of M868Hl with an SDLD bug fix (cleaner design).

./DEC/Mxxx/M869: VC8E Point Plot Display Controller

M869D: is a start toward a drawing of DEC's M869D.

./DEC/Mxxx/M870: IMPLEMENTS SIMPLE CLOCK IN PDP12

./DEC/Mxxx/M880: 25& WORD ROM, 8/E, QUAD, \(USES G643\) \(MR8-EA\)

./DEC/Mxxx/M882: Omnibus Real Time Clock (Line)

M882: is a drawing of DEC's M882 (ECO Rev. C) Real time Clock based on the work of Jack Rubin.

./DEC/Mxxx/M883: REAL TIME CLOCK, CRYSTAL, \(DK8-EC\) 8.5 QUAD, 3 FREQ CHOICE, REPLACED BY M8330

./DEC/Mxxx/M8830: DK8-EC Omnibus Real Time Clock (Crystal)

M8830: is a drawing of DEC's M8830 (ECO Rev. C) Real time Clock.

./DEC/Mxxx/M884: REDUNDANCY CHECK, CRC, LRC & VRC GEN & CHECK, KG8-E, QUAD X 8.5

./DEC/Mxxx/M885: VC8E Point Plot Display D/A

M885E: is a start toward a drawing of DEC's M885E.
VC8E: is a paste-up of M869D and M885E, starting point for the VC8E CUPL.
VC8Evrs: is a combination M869 and M88e based on the CUPL.

./DEC/Mxxx/M890: Motion Control for TU10

M890F: needs a drawing.

./DEC/Mxxx/M8901: DATA SYNCHRONIZER, TU16, QUAD 8.5

./DEC/Mxxx/M8902: TM02 TAPE CONTROL, PE, QUAD

./DEC/Mxxx/M8904: TM02 TAPE CONTROL, NRZI, QUAD

./DEC/Mxxx/M8905: TM02 MAINTENANCE REGISTER, QUAD

./DEC/Mxxx/M8906: TM02 16-BIT FIDDLER, QUAD

./DEC/Mxxx/M891: TU10 CRC and Write Gating, Double

M891: is a version of DEC's M891 CRC and Write Gating module.

./DEC/Mxxx/M8911: TU16 SLAVE CLOCK, MOTION DELAY, DOUBLE 8.5

./DEC/Mxxx/M892: TU10 Write Gap Timing, Double

./DEC/Mxxx/M8920: TS03 TO TU10 MASTER BUS INTERFACE, NON-STANDARD SIZE

./DEC/Mxxx/M893: 9 TRACK WRITE BUFFER FOR TU10, +LOGIC VERSION OF M763

./DEC/Mxxx/M895: TU10/TU15 Read Timing, Double

./DEC/Mxxx/M896: TU10 CRC Checker

M896: is a drawing of DEC's M896 CRC Checker module, using the hard to find 8202.
M896n: is a version of the M896 CRC Checker with the 8202 replaced with the more common 74174.

./DEC/Mxxx/M900: CONNECTOR TO 8/I CONSOLE, 30 SIGNALS, 2 GNDS, TTL BUFFERING

M900D: is a drawing of DEC's M900D.
M900X: is a 'modernized' version of M900.

./DEC/Mxxx/M901: Flat Mylar Cable Connector, 10 ohms in A2,B2,U1 & V1, 2 cables

M901B: is a drawing of DEC's M901B.
M901X: is a 'modernized' version of M901.

./DEC/Mxxx/M902: TERMINATOR, 18 100 OHM RESISTORS, M903 & M904 CONNECTIONS

M902A: needs a drawing.

./DEC/Mxxx/M903: Flat Mylar Connector, 18 signals, 14 GND pins

M903B: is a drawing if DEC's M903B.
M903X: is a 'mdernized' version of M903.

./DEC/Mxxx/M904: Coax Connector, 2x 9-signals, split lug, M903 Pins

M904B: needs a drawing.

./DEC/Mxxx/M905: SPECIAL RIBBON CABLE CONNECTOR, DF32

./DEC/Mxxx/M906: Cable Terminator

M906A: is a drawing if DEC's M906A.
M906X: is a 'mdernized' version of M906A.

./DEC/Mxxx/M907: Diode Clamp

M907A: needs a drawing.

./DEC/Mxxx/M908: Connector Module

M908B: is a drawing of DEC's M908B.
M908X: is a 'modernized' version of DEC's M908B.

./DEC/Mxxx/M909: Terminator Card

M909A: needs a drawing.

./DEC/Mxxx/M90x,W0x1: Negibus/Posibus Connectors

BusCon: is a version of DEC's M90x and W0x1 connector paddles, (based on the work from the BusCon project).

./DEC/Mxxx/M910: CP Terminator Card

M910A: needs a drawing.

./DEC/Mxxx/M9100: H854 to H854 or Flip Chip Adapter, extended single

./DEC/Mxxx/M911: Memory Bus CP Terminator

M911A: needs a drawing.

./DEC/Mxxx/M912: Coax Connector, 4x 9-conductor, split lug, M904 Connections, double

./DEC/Mxxx/M915: 35 WIRES TO PDP-15 CONSOLE WITH PULL-UP RESISTORS

./DEC/Mxxx/M916: 36 Pin connector

M916: is a version of DEC's M916 36 pin paddle connector.

./DEC/Mxxx/M917: Ribbon Connector, 18 Signals, 14 GND Pins, split lug

./DEC/Mxxx/M918: Flat Mylar Connector, 36 Signals

M918A: needs a drawing.

./DEC/Mxxx/M919: 11 EXTERNAL BUS, 2 60-WIRE MYLAR, 56 SIGNALS, 14 GND PINS

./DEC/Mxxx/M920: Unibus Jumper Module

M920B: needs a drawing.

./DEC/Mxxx/M921: DEVICE CODE SELECT JUMPER MODULE, FOR 3 IOT'S

./DEC/Mxxx/M922: M901 WITH JUMPERS INSTEAD OF RESISTORS FOR INDICATOR BUS, NOT TO BE USED ON BOTH ENDS OF ANY CABLE

./DEC/Mxxx/M925: Flat Mylar Connector, 18 Signals, 19 Grounds, short single

./DEC/Mxxx/M926: M901 WITH 100 OHMS IN SERIES WITH SOME OF THE PINS

./DEC/Mxxx/M927: Coax Connector, 18-signals, split lug, short

M927A: needs a drawing.

./DEC/Mxxx/M929: Bus Connector, double

./DEC/Mxxx/M930: Bus Terminator (double, short)

M930: is a version of DEC's M930 RK05/Unibus Terminator card using discrete resistors.
M930C: is a version of DEC's M930C RK05/Unibus Terminator card, which uses DIP resistor packs.
M930D: needs a drawing.
M930E: needs a drawing.

./DEC/Mxxx/M931: 15 TERMINATORS, 2K TO +5V, CLAMPED AT +.75 & +3V, M903 PINS EXCEPT 9 INDICATOR OUTPUTS, KI10

./DEC/Mxxx/M935: Omnibus Jumper Module

M935B: needs a drawing.

./DEC/Mxxx/M938: M903 CONNECTIONS WITH 18 3K LOADS CLAMPED TO -3V

./DEC/Mxxx/M939: M906 WITH 1K RESISTORS INSTEAD OF 220 OHMS

./DEC/Mxxx/M941: JUMPER/EXTENDER BOARD FOR TU56

./DEC/Mxxx/M942: Bus Terminator (double)

M942A: needs a drawing.

./DEC/Mxxx/M943: Cable Connector

M943A: needs a drawing.

./DEC/Mxxx/M947: INDICATOR DRIVER, 24 CKTS, CABLE OUT BACK

./DEC/Mxxx/M948: 24 RESISTORS TO CABLE, 4 RESISTORS TO COMMON POINT, COMPANION TO M947

./DEC/Mxxx/M949: 9 INDICATOR DRIVERS, 18 SIGNALS, FOR KI CONSOLE

./DEC/Mxxx/M950: 9 RESISTORS TO CABLE, 9 R TO COMMON, 18 RC FILTERS, COMPANION TO M949

./DEC/Mxxx/M952: 27 LEVEL TERMINATORS, CLAMPS AT +.75 & 3.25V

./DEC/Mxxx/M953: Flat Cable Connector, 18 Signals, 18 Grounds

./DEC/Mxxx/M954: Flat Cable Connector, 36 Signals

./DEC/Mxxx/M955: Flat Cable Connector, 18 Signals

./DEC/Mxxx/M956: 18 130 OHMS TO +3.0V, M903 PINS

./DEC/Mxxx/M957: 8,5" LONG M908, NO HANOLE, CABLE CLAMP LOCATION ON SIDES & END

./DEC/Mxxx/M960: TD8E Connector #1

M960: is a version of DEC's M960 TD8E Connector board.
M960old: is a checkpoint of an incomplete version of DEC's M960 TD8E Connector board.

./DEC/Mxxx/M961: TD8E Connector #2

M961: is a version of DEC's M961 TD8E Connector board.
intercon: is just the interconnection of the ribbon cables.
M961old: is an early incomplete version of M961.

./DEC/Mxxx/M966: PDP15 Memory Bus Terminator

M966A: needs a drawing.

./DEC/Mxxx/M969: 24 LEVEL TERMINATORS LIKE M952 + 1 THERMISTOR

./DEC/Mxxx/M970: H854 MTD ON SINGLE X 8.5 CARD, ACCEPTS BC05C & BC01V

./DEC/Mxxx/M971: Cable Interface Board #2 (long)

M971B: needs a drawing.

./DEC/Mxxx/M973: TTY Cable Connector (long)

M973A: needs a drawing.

./DEC/Mxxx/M975: Flip Chip to 2x H854 Adapter, special double

./DEC/Mxxx/M982: Blank Universal Terminator

M982B: needs a drawing.

./DEC/Mxxx/M989: TEMINATOR FOR 8/E TO TU10-M CABLE

./DEC/Mxxx/M993: RK8E Control Cable Connector

M993: is a version of DEC's M993 RK8E Control Cable Connector, with the select DEC7384 replaced with a more readily available gate.

./DEC/Mxxx/M997: H854 ON DOUBLE X 5 MODULE, ALL PINS BROUGHT OUT

./DEC/Mxxx/Mxxx: CPLD versions of Mxxx

single44: is a single-height module using a 44 pin PLCC.
single84: is a single-height module using a 84 pin PLCC.

./DEC/PC04: PC04 Paper Taoe Reader Punch

7006268-0: is a drawing of DEC's PC04 backplane for the 8/I.
7006268-0: is a drawing of DEC's PC04 backplane for the 8/I.
7006268-1: is a drawing of DEC's PC04 backplane for the 8/E/F/M and the 8/L.

./DEC/PDP8I: PDP-8/i

pdp8i: is a drawing of DEC's PDP-8/i computer backplane, rounded up from the CPU and option drawings.
pdp8i-dec: is a drawing of DEC's PDP-8/i computer backplane.
pdp8i-fpga: is a drawing of DEC's PDP-8/i computer backplane, tweaked for FPGA conversion.

./DEC/PDP8L: PDP-8/L

pdp8l: is a drawing of DEC's PDP-8/L computer backplane, with some NC pins grounded to suppress warnings, and the hand-wired +5 distribution connections omitted.

./DEC/PDP8S: PDP-8/S

Memory-4K.sch: is a schematic by John Price of a proposed core replacement for the 8/S.
memory-32kx13.sch: is another schematic by John Price of a proposed core replacement for the 8/S.
ramboard: is my drawing for a battery backed SRAM for the 8/S. This one uses an open collector bus to reduce the number of drivers.
mtiming: is a schematic with my notes on memory timing in the 8/S.
PDP8S: is a snapshot of the 8/S schematics (just the first page).
pre-io: is another snapshot of the 8/S schematics (9 pages done).
memory: is a complete schematic for the 8/S, with the core memory subsystem replaced with level converters and a ramboard.
5403833B: is a drawing of the front panel lights board for the 8/S.

./DEC/PowerMon: Voltage monitor for DEC backplanes

Vprobe: is a single height board suitable for monitoring voltages and 5V supply ripple.

./DEC/PowerSupplies: DEC Power Supplies

./DEC/PowerSupplies/4913: Lab Power Supply Mounting Rack

./DEC/PowerSupplies/700: Lab Power Supply Panel

./DEC/PowerSupplies/900: Lab Power Supply Panel w/o Supply

./DEC/Proto: DEC Compatible Prototyping boards

proto: is a quad prototype board suitable for DIP/through hole designs.
omniproto: is a quad prototype board suitable for Omnibus DIP/through hole designs.
eBay1: is a quad prototype board inspired by one seen on eBay.

./DEC/RL0x: RL01/RL02 Related stuff.

./DEC/RL0x/terminator: RL0x Termininator boards.

terminator-sil: is a terminator implemented with SIL resistors.
terminator: is a terminator implemented with discrete SMT (0805) resistors.

./DEC/RX8E: M8357 RX8E Floppy Interface

RX8E: is a drawing of DEC's M8357 RX8E Floppy Interface board.

./DEC/Rxxx: Rxxx modules

./DEC/Rxxx/R001: Diode Network, 7 diodes, both ends brought to pins

R001A: is a drawing of DEC's R001A.
R001B: is a drawing of DEC's R001B.
R001X: is a 'modernized' R001.

./DEC/Rxxx/R002: Diode Network, 5 groups of 2 diodes, cathode common

R002A: is a drawing of DEC's R002A.
R002B: is a drawing of DEC's R002B.
R107X: is a 'modernized' R002.

./DEC/Rxxx/R012: Diode Network, R002 etch, anodes common

./DEC/Rxxx/R107: 7 Inverters, 1 with expansion node

R107A: is a drawing of DEC's R107A.
R107B: is a drawing of DEC's R107B.
R107C: needs a drawing.
R107D: is a drawing of DEC's R107D.
R107E: needs a drawing.
R107S1A: is a drawing of DEC's R107S1A.
R107X: is a 'modernized' R107.

./DEC/Rxxx/R1075: 7 Inverters, 1 with expansion node

R1075B: is a drawing of DEC's R1075B.
R1075X: is a 'modernized' R1075.

./DEC/Rxxx/R111: 3 2-Input Gates, Expandable, Open Collector, 3 clamp load resistors

R111E: is a drawing of DEC's R111E.
R111F: is a drawing of DEC's R111F.
R111X: is a 'modernized' R111.

./DEC/Rxxx/R1110: R111 with 2mA fan-in & 6534-C transistors, sinks 63ma

./DEC/Rxxx/R113: 5 2-Input Gates

R113A: is a drawing of DEC's R113A.
R113B: is a drawing of DEC's R113B.
R113X: is a 'modernized' R113.

./DEC/Rxxx/R1130: R113 with 2mA fan-in & 6534-C transistors, sinks 63ma

./DEC/Rxxx/R121: 2 2-Input, 1 3-Input, 1 4-Input Gates

R121A: is a drawing if DEC's R121A.
R121B: needs a drawing.
R121X: is a 'modernized' R121.

./DEC/Rxxx/R122: Logical Complement of R121

R122C: is a drawing if DEC's R122C.
R122X: is a drawing of a 'modernized' R122.

./DEC/Rxxx/R123: Input Bus Gate, 6 Gates, 1 Independent Input, 1 Paired Common Input

R123A: is a drawing of DEC's R123A.
R123B: is a drawing of DEC's R123B.
R123X: is a 'modernized' R123.

./DEC/Rxxx/R131: Exclusive OR, 4 circuits, Output is -3V if inputs are the same

R131C: is a drawing of DEC's R131C.
R131X: is a 'modernized' R131.

./DEC/Rxxx/R141: AND-NOR Gate, 7 sets of 2-Input AND Gates NORed together

R141C: is a drawing of DEC's R141C.
R141D: is a drawing of DEC's R141D.
R141E: is a drawing of DEC's R141E.
R141X: is a 'modernized' R141.

./DEC/Rxxx/R151: Binary-Octal Decoder, 6 Inputs + Enable, 8 Outputs

R151A: is a drawing of DEC's R151A.
R151B: is a drawing of DEC's R151B.
R151D: is a drawing of DEC's R151D.
R151X: is a 'modernized' R151.

./DEC/Rxxx/R152: Obsolete, R151 without clamp loads, see B152

./DEC/Rxxx/R181: DC Carry Chain, 6 Interconnected Diode Gates + 1 Inverter

R181A: is a drawing of DEC's R181A.
R181C: is a drawing of DEC's R181C.
R181X: is a 'modernized' R181.

./DEC/Rxxx/R200: Set-Reset Flip-flop

./DEC/Rxxx/R201: RS FF with 3 Set and 2 Reset DCD Gates

R201A: needs a drawing.
R201B: is a drawing of DEC's R201B.
R201C: is a drawing of DEC's R201C.
R201D: is a drawing of DEC's R201D.
R201X: is a 'modernized' R201.

./DEC/Rxxx/R202: Dual FF, Direct Clear, Common Set, 1 set & 1 reset DCD Gate each

R202D: is a drawing of DEC's R202D.
R202E: is a drawing of DEC's R202E.
R202X: is a 'modernized' R202.

./DEC/Rxxx/R203: Triple FF, Direct Clear, Set DCD Gate each

R203D: is a drawing of DEC's R203D.
R203X: is a 'modernized' R203.

./DEC/Rxxx/R204: Quad FF, Direct Set for each, Direct Clear for 2, Common for 2

R204B: is a drawing of DEC's R204B.
R204X: is a 'modernized' R204.

./DEC/Rxxx/R205: Dual FF, Common Direct Clear, 2 DCD Gates each

R205B: is a drawing of DEC's R205B.
R205D: is a drawing of DEC's R205D.
R205X: is a 'modernized' R205.

./DEC/Rxxx/R210: PDP8 Accumulator

R210A: is a drawing of DEC's R210A.
R210I: is a drawing of DEC's R210I.
R210L: is a drawing of DEC's R210L.
R210X: is a 'modernized' R210.

./DEC/Rxxx/R211: MB, PC, MA, (PDP8)

R211J: is a drawing of DEC's R211J.
R211K: needs a drawing.
R211L: needs a drawing.
R211X: is a 'modernized' R211.

./DEC/Rxxx/R212: MQ (PDP8), 2 FFs, SR, SL, Read-in, Clear

R212D: is a drawing of DEC's R212D.
R212F: is a drawing of DEC's R212F.
R212J: needs a drawing.
R212X: is a 'modernized' R212.

./DEC/Rxxx/R220: 3-Bit SR, Parallel Read-in, Diodes out for detecting all 0s in R111 node

R220J: is a drawing of DEC's R220J.
R220L: is a drawing of DEC's R220L.
R220X: is a 'modernized' R220J.

./DEC/Rxxx/R284: Quadraflop, PDP8, 4 stable states

R284A: is a drawing of DEC's R284A.
R284B: is a drawing of DEC's R284B.
R2840X: is a 'modernized' R284.

./DEC/Rxxx/R302: 2 One-shots

R302J: is a drawing of DEC's R302J.
R302K: is a drawing of DEC's R302K.
R302L: is a drawing of DEC's R302L.
R302X: is a 'modernized' R302.

./DEC/Rxxx/R303: Integrating One Shot

R303D: needs a drawing.
R303X: is a 'modernized' R303.

./DEC/Rxxx/R401: Variable Clock, 30CPS to 2 MC

R401D: is a drawing of DEC's R401D.
R401F: is a drawing of DEC's R401F.
R401H: is a drawing of DEC's R401H.
R401X: is a 'modernized' R401.

./DEC/Rxxx/R405: Crystal Clock, 5 KC to 2 MC Available

R405H: is a drawing of DEC's R405H.
R405J: is a drawing of DEC's R405J.
R405X: is a 'modernized' R405.

./DEC/Rxxx/R406: Clock for PDP9/L, 1.5us

./DEC/Rxxx/R407: PDP9 Parity Clock, 1.2us

./DEC/Rxxx/R408: PDP8 Clock

./DEC/Rxxx/R409: PDP9 Clock (R405 configured for 1MC)

R409H: is a drawing of DEC's R409H.
R409J: is a drawing of DEC's R409J.
R409X: is a 'modernized' R409.

./DEC/Rxxx/R450: Variable Clock

R450B: is a drawing of DEC's R450B.
R450E: is a drawing of DEC's R450E.
R450X: is a 'modernized' R450.

./DEC/Rxxx/R451: Teletype Clock, for faster teletype think R450

R451E: is a drawing of DEC's R451E.
R451X: is a 'modernized' R451.

./DEC/Rxxx/R601: Pulse Amplifier, 6 DCD Gates, 100 or 400 ns pulses

R601E: is a drawing of DEC's R601E.
R601F: is a drawing of DEC's R601F.
R601H: is a drawing of DEC's R601H.
R601X: is a 'modernized' R601.

./DEC/Rxxx/R602: Pulse Amplifier, 2 DCD Gates & 1 Diode Input each, 100 or 400 ns pulses

R602H: is a drawing of DEC's R602H.
R602K: is a drawing of DEC's R602K.
R602X: is a 'modernized' R602.

./DEC/Rxxx/R603: Pulse Amplifier, 3 circuits, 1 DCD Gate & 1 Diode Input each

R603D: is a drawing of DEC's R603D.
R603X: is a 'modernized' R603.

./DEC/Rxxx/R613: R603 that cannot be triggered from output, with 5 mA loads

R613B: is a drawing of DEC's R613B.
R613X: is a 'modernized' R613.

./DEC/Rxxx/R623: R603 with 400us pulse, R603 etch, retrofit for LINC-8

./DEC/Rxxx/R650: Bus Driver, 2 circuits, 2 Inputs & Node

R650BS1B: is a drawing of DEC's R650BS1B.
R650C: is a drawing of DEC's R650C.
R650E: is a drawing of DEC's R650E.
R650X: is a 'modernized' R650.

./DEC/Rxxx/R663: B163 with DEC 6534C (6 2-Input NANDs, 1 Input/Gate + 1 Input/Gate pair, 2mA fan-in)

./DEC/Sxxx: Sxxx Modules

./DEC/Sxxx/S107: R107 with 5 mA Clamp Loads

S107A: needs a drawing.
S107D: is a drawing of DEC's S107D.
S107S1A: is a drawing of DEC's S107S1A.
S107X: is a 'modernized' S107.

./DEC/Sxxx/S111: R111 with 5 mA Clamp Loads

S111E: is a drawing of DEC's S111E.
S111F: is a drawing of DEC's S111F.
S111X: is a 'modernized' S111.

./DEC/Sxxx/S123: Diode Gate

S123B: is a drawing of DEC's S123B.
S123X: is a 'modernized' S123.

./DEC/Sxxx/S151: R151 with 5 mA Clamp Loads

S151A: is a drawing of DEC's S151A.
S151B: is a drawing of DEC's S151B.
S151D: is a drawing of DEC's S151D.
S151X: is a 'modernized' S151.

./DEC/Sxxx/S181: DC Carry Chain, 6 Interconnected Diode Gates + 1 Inverter

S181A: is a drawing of DEC's S181A.
S181C: is a drawing of DEC's S181C.
S181X: is a 'modernized' S181.

./DEC/Sxxx/S202: R202 with 5 mA Clamp Loads

S202D: is a drawing of DEC's S202D.
S202E: is a drawing of DEC's S202E.
S202X: is a 'modernized' S202.

./DEC/Sxxx/S203: R203 with 5 mA Clamp Loads

S203D: is a drawing of DEC's S203D.
S203X: is a 'modernized' S203.

./DEC/Sxxx/S205: R205 Dual Flip Flop with 5 mA Clamp Loads

S205C: is a drawing of DEC's S205C.
S205D: is a drawing of DEC's S205D.
S205X: is a 'modernized' S205.

./DEC/Sxxx/S206: S205 Dual Flip Flop with 10mA clamp loads

S206D: is a drawing of DEC's S206D.
S206X: is a 'modernized' S206D.

./DEC/Sxxx/S284: R284 with 5 mA Clamp Loads

S284B: is a drawing of DEC's S284B.
S284X: is a 'modernized' S284.

./DEC/Sxxx/S602: R602 with 5 mA Clamp Loads

S602H: is a drawing of DEC's S602H.
S602K: is a drawing of DEC's S602K.
S602X: is a 'modernized' S602.

./DEC/Sxxx/S603: R603 with 5 mA Clamp Loads

R603D: is a drawing of DEC's R603D.
R603X: is a 'modernized' R603.

./DEC/Sykes: Sykes Omnibus Floppy Controller

1005A0151D: needs a drawing.

./DEC/TC08: TC08 Backplane

indicators: is an LED version of the TC08 Indicator panel.
so-indicators: is a surface mount version of the indicators board.
so-indicators-ok: is a backup of so-indicators.
tc08nh: is a successful routing without screw holes.
tc08: is a drawing of DEC's TC08 DECtape Controller.
tc08-6u: is a drawing of DEC's TC08 DECtape Controller, drawn to fit in 6Uin a DEC rack.
tc08-8-07: is an 8/2007 checkpoint of the TC08 drawing.

./DEC/TP34_Autoloader: TP-34 Autoloader

TP-34: is a drawing of the Tennecomp TP-34 Autoloader for Omnibus machines.
TP-34ren: is a drawing of the TP-34 Autoloader with the original wonky chip numbering.

./DEC/TR02x: TR02 Incremental Tape Controller

tr02: is a drawing of DEC's TR02 Incremental Tape Controller. So far, only one of the two drive's controllers is complete.

./DEC/TSC8-75: TSC8-75 EDUCOMP ETOS Timeshare Extension

TSC8-75: is a drawing of EDUCOMP's ETOS Timeshare Extension.

./DEC/VC8x: VC8i Compatible Posibus Device.

vc8: is a drawing of a VC8/I compatible device built out of flipchips. It is based on www.chd.dyndns.org/pdp8/VC8.

./DEC/Wxxx: Wxxx modules

./DEC/Wxxx/W002: 15 2mA Clamped Loads, W005 etch

W002B: is a drawing of DEC's W002B.
W002X: is a 'modernized' W002.

./DEC/Wxxx/W005: 15 Clamped Loads

W005B: is a drawing of DEC's W005B.
W005X: is a 'modernized' W005.

./DEC/Wxxx/W010: 10 10mA Clamped loads to -15V

W010A: is a drawing of DEC's W010A.
W010X: is a 'modernized' W010.

./DEC/Wxxx/W011: W021 but 3.25" long.

W011B: is a drawing of DEC's W011B.
W011X: is a 'modernized' W011.

./DEC/Wxxx/W012: Flexprint Indicator Cable, -15 +15 Signal, PDP10

./DEC/Wxxx/W013: Word Sink Stack Connector, W016 etc, PDP10, 2 1/2 D Memory

./DEC/Wxxx/W014: Digit Stack Connector, PDP10, 2 1/2 D Memory, modified W015 layout

./DEC/Wxxx/W017: Drive Cable Connector, PDP9 Memory

./DEC/Wxxx/W018: Cable Connector for Indicator Amplifiers (with diodes)

./DEC/Wxxx/W020: Indicator Cable Conn,. 18 ribbon cable, 1.5K resistors

W020B: is a drawing of DEC's W020B.
W020X: is a 'modernized' W020.

./DEC/Wxxx/W021: Signal Cable Conn., 19 wire ribbon, D, E, H, K, M, P, S, T, V hot, 10 grounds: C, F, J, L, N, R, U

W021A: is a drawing of DEC's W021A.
W021B: is a drawing of DEC's W021B.
W021X: is a 'modernized' W021.

./DEC/Wxxx/W022: W021 with 100 ohm shunt terminators

./DEC/Wxxx/W023: 18 Line Ribbon Connector, component spaces near A & B, others straight through

W023A: is a drawing of DEC's W023A.
W023X: is a 'modernized' W023.

./DEC/Wxxx/W024: Coax Connector, 16-signals, split lug, short

W024X: is a 'modernized' W024.

./DEC/Wxxx/W025: 32 Split Lugs, 4 slots, double size, Memory Paddle used for W075

W025A: is a drawing of DEC's W025A.
W025X: is a 'modernized' W025.

./DEC/Wxxx/W026: 18 Split Lugs, diode and resistor termination

W026B: is a drawing of DEC's W026B.
W026X: is a 'modernized' W026.

./DEC/Wxxx/W027: Ribbon Cable Connector, 18 Signals with 3Kohm resistors, split lugs

./DEC/Wxxx/W028: W021 with lugs for series of shunt resistors or diodes in signal leads

W028A: is a drawing of DEC's W028A.
W028X: is a 'modernized' W028.

./DEC/Wxxx/W031: Flat Mylar Cable Connector, 9 Signals, 9 Grounds, short single

./DEC/Wxxx/W032: 5 shielded triples, DEC Tape Signal Connector, double

W032B: is a drawing of DEC's W032B.
W032X: is a 'modernized' W032.

./DEC/Wxxx/W033: Flexprint, W023 connections, side entry cable

W033C: is a drawing of DEC's W033C.
W033X: is a 'modernized' W033.

./DEC/Wxxx/W034: Flexprint, 16 connections on "B" side 10 ohms on A2, B2

W034D: is a drawing of DEC's W034D.
W034H: is a drawing of DEC's W034H.
W034X: is a 'modernized' W034.

./DEC/Wxxx/W035: Cable Connector

./DEC/Wxxx/W040: 2 Solenoid Drivers, 2 Inputs plus a node, 0.6A max, similar to 4113 + 4681

W040B: is a drawing of DEC's W040B.
W040X: is a 'modernized' W040.

./DEC/Wxxx/W042: 10 Amp Driver (double height, double width)

./DEC/Wxxx/W043: 2 Solenoid Drivers, 2 Inputs plus a node, 2.0A max, similar to W040

./DEC/Wxxx/W050: 7 Indicator/Solenoid Drivers, 30mA -20V max

W050B: is a drawing of DEC's W050B.
W050C: is a drawing of DEC's W050C.
W050X: is a 'modernized' W050.

./DEC/Wxxx/W051: 7 Indicator/Solenoid Drivers, 100mA -15V max

W051D: is a drawing of DEC's W051D.
W051X: is a 'modernized' W051.

./DEC/Wxxx/W061: 4 Relay Drivers, 250mA +55V max

W061B: is a drawing of DEC's W061B.
W061C: is a drawing of DEC's W061C.
W061X: is a 'modernized' W061.

./DEC/Wxxx/W070: Teletype Cable Connector, PDP8, PT08

W070C: is a drawing of DEC's W070C.
W070X: is a 'modernized' W070.

./DEC/Wxxx/W072: LINC-8 Scope Cable Connector

./DEC/Wxxx/W073: LINC-8 Tape Cable Connector

./DEC/Wxxx/W076: Teletype Connector, from Positive Logic 8/I, logic equivalent to W070

W076B: is a drawing of DEC's W076B.
W076D: is a drawing of DEC's W076D.
W076X: is a 'modernized' W076D.
W076Dclone: is a drawing of a clone of DEC's W076D.

./DEC/Wxxx/W077: 10 OHMS A & B, OTHER STRAIGHT THRU, FLEX PRINT, CABLE AT END

./DEC/Wxxx/W078: W076 with AMP connector instead of cable

W078: is a drawing of DEC's W078.

./DEC/Wxxx/W080: Isolated AC/DC Switch

./DEC/Wxxx/W100: Emitter Follower

./DEC/Wxxx/W101: I/O Bus Driver, similar to 4657

W101A: is a drawing of DEC's W101A.
W101B: is a drawing of DEC's W101B.
W101X: is a 'modernized' W101B.

./DEC/Wxxx/W102: Memory Bus Transceiver, 1665 type

W102J: is a drawing of DEC's W102J.

./DEC/Wxxx/W103: Device Selector, PDP8, double

W103C: is a drawing of DEC's W103C.
W103X: is a 'modernized' W103.

./DEC/Wxxx/W104: PDP-9 I/O Bus Module (double)

W104C: is a drawing of DEC's W104C.
W104X: is a 'modernized' version of W104C.

./DEC/Wxxx/W106: Priority Interrupt Grant

./DEC/Wxxx/W107: I/O Receiver, PDP10, 7 channels

W107B: is a drawing of DEC's W107B.
W107X: is a 'modernized' W107.

./DEC/Wxxx/W108: Bipolar Decoding Driver, double

W108C: is a drawing of DEC's W108C.
W108X: is a 'modernized' W108.

./DEC/Wxxx/W122: Pulsed Bus Transceiver, pin compatible with W102 & W112, positive logic in, -bus, -logic out

./DEC/Wxxx/W123: Device Selector (double)

W123C: is a drawing of DEC's W123C.
W123X: is a 'modernized' W123.

./DEC/Wxxx/W132: Memory Bus Transceiver, KI10, negative bus, 4 circuits, similar to W102

./DEC/Wxxx/W250: 12 Indicator Drivers, flex print, ground & -15V from male end

./DEC/Wxxx/W300: Tapped 800ns Delay Lines with 50ns taps, 3 Output Amplifiers, replaced by W301

W300C: is a drawing of DEC's W300C.

./DEC/Wxxx/W301: Tapped 800ns Delay Lines with 50ns taps, W300 pins, different input loading and improved margins

./DEC/Wxxx/W404: DTR Jumper (2.5" length)

W404C: is a drawing of DEC's W404C.
W404X: is a 'modernized' W404.

./DEC/Wxxx/W500: High Impedance Follower, 7 circuits

W500A: is a drawing of DEC's W500A.
W500X: is a 'modernized' W500.

./DEC/Wxxx/W501: Schmitt Trigger, +/-10V in, 0 and -3V out

W501D: is a drawing of DEC's W501D.
W501F: is a drawing of DEC's W501F.
W501X: is a 'modernized' W501.

./DEC/Wxxx/W502: 2 Photon Coupled Triggers

./DEC/Wxxx/W504: Initial Transient Detector, A Schmitt, 0 delay, 10ms blackout

W504A: is a drawing of DEC's W504A.
W504X: is a 'modernized' W504.

./DEC/Wxxx/W505: Low Voltage Detector, measures +10V & -15V

./DEC/Wxxx/W506: Power Monitor

W506C: is a drawing of DEC's W506C.
W506E: is a drawing of DEC's W506E.
W506X: is a 'modernized' W506.

./DEC/Wxxx/W507: Low Voltage Detector, ME10, measures +5, +5, -15, -15, all reg, -15, +10 unreg, double

./DEC/Wxxx/W509: 3 phase AC Low Voltage Detector

./DEC/Wxxx/W510: Positive Level Converter, 3 circuits, thresholds of 0, +1 or +2V; 0 & -3V out

./DEC/Wxxx/W511: Negative Level Converter, 2 circuits, thresholds of 0, -1, -2V, -3V; 0 & -3V out

W511A: is a drawing of DEC's W511A.
W511X: is a 'modernized' W511.

./DEC/Wxxx/W512: Positive Level Converter, 7 circuits, thresholds of +1.6 or 0.8V for use with TTL; 0 & -3V out

W512A: is a drawing of DEC's W512A.
W512X: is a 'modernized' W512.

./DEC/Wxxx/W513: Negative Level Converter, 6 circuits, used in TU55

./DEC/Wxxx/W514: Positive Level Converter, 6 circuits, 100 ohm input

./DEC/Wxxx/W519: Power Sequence & Crowbar

./DEC/Wxxx/W520: Comparator, 3 differential circuits, 100mV resolution, like 1501 level converter

W520B: is a drawing of DEC's W520B.
W520X: is a 'modernized' W520.

./DEC/Wxxx/W532: Dual AC coupled Sense Amplifier, used on PDP8-S

W532B: is a drawing of DEC's W532B.
W532X: is a 'modernized' W532.

./DEC/Wxxx/W533: Dual Rectifying Slicer, was G803

W533A: is a drawing of DEC's W533A.
W533X: is a 'modernized' W533.

./DEC/Wxxx/W590: IBM N Line to DEC converter

./DEC/Wxxx/W591: Positive Bus to DEC converter, for Memorex, 0 to +3V, 8 MC, 5 channels, W592 pins

./DEC/Wxxx/W592: IBM 360 Bus to DEC Converter (non-inverting)

./DEC/Wxxx/W600: Negative Level Amplifier, like 1667, 3 inverting circuits

W600A: is a drawing of DEC's W600A.
W600X: is a 'modernized' W600.

./DEC/Wxxx/W601: Positive Level Amplifier, 3 inverting circuits

W601D: is a drawing of DEC's W601D.
W601X: is a 'modernized' W601.

./DEC/Wxxx/W602: Bipolar Level Amplifier, 3 circuits, EIA Line Interfacer

W602A: is a drawing of DEC's W602A.
W602X: is a 'modernized' W602.

./DEC/Wxxx/W603: Positive Level Amplifier, 7 circuits

W603A: is a drawing of DEC's W603A.
W603B: is a drawing of DEC's W603B.
W603X: is a 'modernized' W603.

./DEC/Wxxx/W607: 3 Pulse Converters, positive or negative, 70ns 2.5V pulse out

W607B: is a drawing of DEC's W607B.

./DEC/Wxxx/W612: Dual Pulse Amplifier, B602 pins, 120 & 320ns, Diode Output for "OR" Bus

./DEC/Wxxx/W640: 3 Pulse Converters, positive or negative, 400ns or 1us, 2.5V pulse out

W640D: is a drawing of DEC's W640D.
W640J: is a drawing of DEC's W640J.

./DEC/Wxxx/W681: Scope Intensifier for 34 Display

W681A: is a drawing of DEC's W681A.
W681X: is a 'modernized' W681.

./DEC/Wxxx/W682: Scope Intensifier, 0 to +3V step, delay 50 to 300ns, 400ns pulse (for VR12 & VR14)

W682A: is a drawing of DEC's W682A.
W682X: is a 'modernized' W682.

./DEC/Wxxx/W684: Unblank Amplifier and 8 Level Intensity Control

./DEC/Wxxx/W690: DEC to IBM N Line Converter

./DEC/Wxxx/W692: DEC to IBM 360 Bus Driver

./DEC/Wxxx/W693: DEC to CTUL Converter

./DEC/Wxxx/W700: Switch Filter, 6 circuits, similar to 1703, used on W710

W700A: is a drawing of DEC's M700A.
W700B: is a drawing of DEC's M700B.
W700X: is a 'modernized' M700B.

./DEC/Wxxx/W701: Input Network, for PDP8 Card Reader

./DEC/Wxxx/W702: Teletype Level Converter for DC10B Data Line Scanner

W702A: needs a drawing.

./DEC/Wxxx/W7040: Diode Cluster

W7040B: needs a drawing.

./DEC/Wxxx/W705: 3.6V Power Supply, triple width

W705A: is a drawing of DEC's W705A.
W705X: is a 'modernized' W705.

./DEC/Wxxx/W706: Teletype Receiver, 8-bit, 11 Unit Codes, double

W706C: is a drawing of DEC's W706C.
W706E: needs a drawing.

./DEC/Wxxx/W707: Teletype Transmitter, 8 bit, 2 unit stop code, double

W707F: is a drawing of DEC's W707F.
W707H: is a drawing of DEC's W707H.
W707L: is a drawing of DEC's W707L.
W707P: is a drawing of DEC's W707P.

./DEC/Wxxx/W708: Teletype Communications Interface

W708A: needs a drawing.

./DEC/Wxxx/W709: Divide by 16/64 Counter

./DEC/Wxxx/W714: Switch Module, 2 form C micro-switches, no circuits, 9/I memory

W714A: needs a drawing.

./DEC/Wxxx/W720: 4 DC & 3 DIFFERENIATING SWITCH FILTERS FOR + LOGIC, IN TU10

./DEC/Wxxx/W726: 4 DC & 3 Differentiating Switch Filters, for positive logic, TU10

W726B: needs a drawing.

./DEC/Wxxx/W750: TELETYPE MULTIPLEXER

./DEC/Wxxx/W800: 2 Form A Reed Relays, similar to 1803

./DEC/Wxxx/W802: Relay Multiplexer, 8 Reed Relays, double

./DEC/Wxxx/W808: 2-2 Form A, 1/8 Amp 250V Relays

./DEC/Wxxx/W841: 1/2 W851 for 9 Coax

./DEC/Wxxx/W850: Connector, 2 double boards with W021 layout, frame, hold-down screw

./DEC/Wxxx/W851: Connector, similar to W850, W851 is card & components, BC10 is assembly & cable

./DEC/Wxxx/W852: W851 with no components, used in BC10C-xx, uses W851 board

./DEC/Wxxx/W900: Multilayer Extender, long double

./DEC/Wxxx/W940: Wire Wrappable Module, 50x 16 pin, extended quad

./DEC/Wxxx/W941: Wire Wrappable Module, 25x 16 pin, extended double

./DEC/Wxxx/W942: Wire Wrappable Module, 50x 16 pin, with sockets, extended quad

./DEC/Wxxx/W943: Wire Wrappable Module, 25x 16 pin, with sockets, extended double

./DEC/Wxxx/W950: Wire Wrappable Module, 30x 16 pin, 8x 24 pin, extended quad

./DEC/Wxxx/W951: Wire Wrappable Module, 15x 16 pin, 4x 24 pin, extended double

./DEC/Wxxx/W952: Wire Wrappable Module, 30x 16 pin, 8x 24 pin, with sockets, extended quad

W952: is a drawing of DEC's W952 Wire Wrap prototype board.

./DEC/Wxxx/W953: Wire Wrappable Module, 15x 16 pin, 4x 24 pin, with sockets, extended double

./DEC/Wxxx/W960: MSI Mounting Board (2 14-16 pin or 1 24 pin, all pins brought out)

W960: is a drawing of DEC's W960 MSI Mounting Board, which allows 16 and 24 pin DIP components to be connected to a DEC backplane.

./DEC/Wxxx/W962: 24 PIN IC MOUNT WITH A2 \(PIN 24\) +5V & C2,T1 \(PIN 12\) GND, BOARD 50-08908A, ALSO USED FOR M155, M159, M1713

./DEC/Wxxx/W964: Blank Universal Terminator, 28 pins, single 5", 50-09733 etch

W964: is a drawing of DEC's W964 Universal Terminator board.

./DEC/Wxxx/W966: Wire Wrappable Module, 42x 16 pin, 72 terminal fingers, I/O header, extended quad

./DEC/Wxxx/W967: Wire Wrappable Module, 42x 16 pin, 72 terminal fingers, I/O header, with sockets, extended quad

./DEC/Wxxx/W968: Collage Mounting Board, 72x 16 pin, extended quad

./DEC/Wxxx/W969: Collage Mounting Board, 36x 16 pin, extended double

./DEC/Wxxx/W970: Bare Board, 36 pins, no split lugs, similar to W990

./DEC/Wxxx/W971: Bare board, 72 pins, no lugs, similar to W991, double

./DEC/Wxxx/W972: Copper Clad, 36 pins, similar to W992

./DEC/Wxxx/W9720: Copper clad board, both sides, extended single

./DEC/Wxxx/W9721: Copper clad board, both sides, extended double

./DEC/Wxxx/W9722: Copper clad board, both sides, extended quad

./DEC/Wxxx/W973: Bare Board, 72 pins, copper clad, similar to W993, double

./DEC/Wxxx/W974: Perforated single height board, 36 pins, 0.1" grid, contacts only

./DEC/Wxxx/W975: Perforated double height board, 72 pins, 0.1" grid, contacts only

W975: is a drawing of DEC's W975 double-height perfboard.

./DEC/Wxxx/W979: Collage Mounting Board, 18x 16 pin, double

W979C: needs a drawing.

./DEC/Wxxx/W980: Module Extender, single sided

./DEC/Wxxx/W982: Module Extender, double sided

./DEC/Wxxx/W983: Module Extender, double height double sided

./DEC/Wxxx/W984: Module Extender, extended double

./DEC/Wxxx/W985: System Module Adapter

./DEC/Wxxx/W987: Module Extender, extended quad

./DEC/Wxxx/W990: Blank Module, split lug for each of 18 pins

W990D: is a drawing of DEC's W990D.
W990X: is a 'modernized' W990.

./DEC/Wxxx/W991: Bare board, split lugs, 36 pins, double

./DEC/Wxxx/W992: Copper clad, 18 pins

./DEC/Wxxx/W993: Copper clad, 36 pins, double

W993A: needs a drawing.

./DEC/Wxxx/W994: Perforated Module, 0.2" centers, 18 lands

W994A: needs a drawing.

./DEC/Wxxx/W995: Perforated Module, 0.2" centers, 36 lands, double

./DEC/Wxxx/W998: Perforated single height board, 18 pins, 0.1" grid, contacts only

./DEC/Wxxx/W999: Perforated double height board, 36 pins, 0.1" grid, contacts only

./DEC/X127026: Misc. Function Control

12706: is an incomplete drawing of DEC's 127026 Misc. Function Control board.

./DEC/buscon: Negibus/Posibus Connectors

BusCon: is a version of DEC's M90x and W0x1 connector paddles, (based on the work from the BusCon project).

./DEC/flipchip: 6 pin flip-chip modules

./DEC/xR210: Straight-8 Accumulator

smt: is a incomplete, half-hearted attempt at a surface mount version of the R210 Straight-8 Accumulator board.

./DEC9601: Functional equivalent to DEC9601 chip.

DEC9601: is an attempt to draw an equivalent for the DEC 9601 monostable chip.
libTest: is an failed attempt to create and use a library part for the equivalent. (The libary part is full of DRC errors.)

./DS32-pdp8.net: DS32 replacement based on effort of Dave G. at www.pdp8.net.

ds32djg: follows Dave's schematic closely, laid out on one long and two standard paddles.
ds32: is a start on a "shrink" using SMT.

./EpromEmu: EPROM Emulator based on work of Philip Pemberton.

EpromEmu: is an adaptation of Philip Pemberton's EPROM emulator, which attaches to the parallel port of a PC.

./FP6120: Attempt to replicate Bob Armstrong's FP6120.

./FlipChip: Flip Chip Edge Connector

EdgeConnector: is a gold plated edge connector (outer).
Outline: is a board outline to match EdgeConnector.
Alignment: is a drawing of an EdgeConnector overlaid on the board Outline.
OuterConnector: is an EdgeConnector aligned for the outer quad slots.
InnerConnector: is an EdgeConnector aligned for the inner quad slots.
ConnectorPair: is a pair of EdgeConnectors one inner, one outer.
proto: is a drawing of a single-height proto board.
proto2: is a drawing of a double-height proto board.

./FlipChipTester: Various ideas for a flip-chip tester.

io: is a copy of the I/O board, for reference and component placement.
TestJig: is an incomplete notion involving a PCI slot.
io2: is another copy of the I/O board.
iotst: is an early version of the tester, which connects the I/O board from the ConsoleEmu project to a DEC connector block.
cblockyeesh: is a messy connector block mounting board that attempts to give each socket it's own connection.
cblockyeeshok: is a version of connectorblockyeesh which is fully routed.
cblock-vrs: is a simple connector block board that uses paddle cards to connect up to four sockets.
tester-7410: is a version of the tester board that builds a latch for the OC line using a 7410.
pcbproto-.brd: is a panelization of two copies of the tester, connector block boards, and an experimental G888 board.
pcbproto.brd: is a newer version of the panelization, with silkscreen scripts run.
FlipChip.brd: is still a newer version of the panelization.
cblock: is a version of the connector block board, modified to implement four pairs of socket connections.
tester-2: is revision 2 of the tester board.
transducer: is a messy design for a transducer for negative logic, etc.
transistor: is another messy design for a transducer.
smb: is a surface mount transducer using FET's and whatnot.
small: is a simpler transducer using through-hole parts.
cd4007: is yet another transducer, this time using the 4007.
5transistor: is a transducer for positive or negative logic, implemented with five FETs.
3transistor: is a transducer for positive or negative logic, implemented with three FETs and a section of an LM139 comparator.
32pins: is a set of 32 transducers of the 3transistor variety.
tester: is the flipchip tester, revision 1 (similar to iotst).
tester-rp: is another copy of the flipchip tester, revision 1.
diodes: is an attempt to lay out diode level converters for the flipchip tester.
Rxxx: is an exploration of ideas about conversion of negative logic levels.

./H11-5: Heath H-11 Serial Card

h11-5: is drawing of the H11-5 serial controller card by Heathkit.

./IOB6120: IOB 6120 by Jim Kearney

iob6-r: is the "A" version from Jim Kearney.
iob7c: is the "B" version from Jim Kearney.
iob7cvrs: is iob7c with the silk-screen visible.
iob9avrs: is my first attempt at fixing the battery issue (single CE#, lots of read/write enables).
iob9bvrs: is my second attempt at fixing the battery issue (DS1321D, CE# per ramdisk, series batteries).
iob9cvrs: is the fixed "9C" version manufactured in 2009 (DS1321D with parallel batteries).
iob10avrs: is a copy of "9C" with the bottom side silkscreen glitch (RN2) fixed.
iob16avrs: is a copy of "10a" with Eagle library updates and new routing.

./KM11: KM-11 Debug flip-chip

km11: is my version of the KM11 debug flip-chip. (The one by Guy Sotomayor is much better.)

./LD12: PDP-8 Clone based on Prosser Book

./LogoPanel: Logo Panel for the top of the rack.

8ipanelb: is the outline of an 8/i logo panel.
8ipanel: is an 8/i logo panel, drawn in Eagle.

./M1709: OMNIBUS Interface Foundation Module

M1709: is a drawing of DEC's M1709 Omnibus Interface Foundation (I/O prototyping) board.

./M452S: Simplified M452X that lays out.

M452sx: is a version of the M452 replacement based loosely on DEC's M8655.
M452s: is a crowded version of the M452 replacement that routes in a single layer.

./M452X: M452 Replacement -- M8655 Style

M452x: is a version of the M452 Baud Rate Generator based on the M8655, but not finished.

./M452r: M452 Replacement based on MC14411

M452r: is a replacement for DEC's M452 Baud Rate Generator, based on the MC14411 baud rate generator chip.

./MM8I32K: Core replacement

H01: is a drawing of the board for slot H01.
32KRAM: is the whole design on snap-apart paddle cards.
20230322: is a snapshot as of March 22, 2023.
20230822: is a snapshot as of August 22, 2023.
20230827: is a snapshot as of August 27, 2023.
202405272: is a snapshot as of May 27, 2024.
20240610: is a snapshot as of June 10, 2024.
20240717-7439: is a snapshot as of July 17, 2024, using the 7439.
20240717: is a snapshot as of July 17, 2024, using the 7438.
H01: is a drawing of the board for slot H01.
H02: is a drawing of the board for slot H02.
H03: is a drawing of the board for slot H02.
H04: is a drawing of the board for slot H04.
H05: is a drawing of the board for slot H05.
H05-dl: is a drawing of the board for slot H05 using delay lines.
H05X1: is a drawing of the board for slot H05 using monostables.

./NTC08: Bogus TC08 clone in TTL.

nt08: is an early version of a mechanical translation of the TC08 DECtape controller into TTL.
ntc08: is a start at a "big-board" version of the TC08 DECtape controller.

./Overvoltage: Power Safety Switch

max486x: is a drawing using the max486x chips to isolate valuable circuits from power supply anomalies.
ncp346: is a drawing using the ncp346 chip to isolate valuable circuits from power supply anomalies.

./PCBShop: Boards sent out for fabrication.

./PCBShop/M452x: M452 Replacement Board (as fabbed)

M452x: is the version of the M452 replacement that was actually built.

./PCBShop/W076x: W076 Replacement Board (as fabbed)

w076x: is an old version of the W076 replacement.
w076o: is version of the W076 replacement as ordered from the board fab.
w076oAsBuilt: is a version that matches the blue-wire changes in the as-shipped assembled boards.
W076-3-20: is a version that matches the 3/2020 board run.

./PLD-Omnibus: Ideas for using CPLD devices to build Omnibus cards.

TD8Edaughter: is a daughter card that can be either TD8E or RX8E.
RX8Edaughter: is a daughter card that implements an RX8E controller.
M8357pld: is an RX8E implementation in an ATF1508 CPLD.
M868pld: is a TD8E implementation in an ATF1508 CPLD.
Lafferty1ab: is a copy of the Omnibus memory board (for the prototype area).

./PT08: PT08 TTY Interface

PT08: is a drawing of DEC's PT08 TTY Interface for the PDP-8/S.
PT08pos: is a thought experiment about a Posibus variation on DEC's PT08 TTY Interface for the PDP-8/S.
PT08ttl: is a Posibus TTY TTY Interface implemented in TTL.
PT08ttl2: is a Posibus TTY TTY Interface implemented in TTL with some bugs fixed.
PT08ttl3: is a Posibus TTY TTY Interface implemented in TTL, designed for a ribbon cable bus.

./PosiDMux: FPGA PDP-8 Demultiplexer to Posibus

8j-merge: is the paddle card used to interface to the Posibus device.
posidmux: is an attempt to design an interface between the XESS based FPGA implementation of the PDP-8 and older Posibus gear.

./Posibus: Posibus Backplane and Boards

./RF08: RF08 Replacement

8x11: is an old version of all the boards for the RF08 replacement, panelized on an 8"x11" sheet.
RF08old: is an old version of the controller part of the RF08 replacement.
lights: is the debug display for the RF08 replacement.
drives: contains the "drives" for the RF08 replacement.
drivessop: contains a variation of drives that allows for the cheaper SMT versions of the SRAM chip.
RF08b: is the latest version of the controller for the RF08 replacement.
RF08bOmnibus: is an start on an Omnibus version.

./RF08/Old8x12: RF08 Replacement (Old Version)

writelockswitches: is the writelockswitches board from the DF32 project, for reference.
RS08-.brd: is the disk emulator from the DF32 project, for reference.
RF08-: is the disk emulator from the DF32 project, for reference.
DF32-revision-B: is revision B of the DF32 project, for reference.
DEC8i-buscon: is a slightly updated version of the paddle cable used with the DF32 project.
DEC8L-buscon: is a paddle cable similar to the BC08J.
busadapt: is the bus adaptor board from the DF32 project.
DataBreak: is some schematic musings about data break.
array: is a design for an RF08-sized "drive".
cmorris: is the board from the DF32 project, yet again.
foo: is a tangled attempt to route a revision to the DF32 project.
RF08bck: is a checkpoint of some early work on an RF08 board.
RF08x: is a much more complete attempt at an RF08 replacement.
RS08: is a fairly complete RS08 "drive" pair.
RF08nv: is a newer version of the RF08 replacement, that didn't route.
RF08indx.sch: is the RF08 schematic with an extra sheet for the indicators and their drivers.
RF08ind: is a routed oversize board with the controller and the indicators.
olimex: is the controller and the drives, without the indicators.
spe10: is a set of controller, drives and indicators in an 8"x12.6" panel.
swizzle: is a swizzle board to allow the use of new paddles (34 wire ribbons) with the DF32 project.
RF08-1: is a revision to the controller that doesn't quite route.
RF08: is just the RF08 controller, in the panel by itself.
olimex10: is the RF08 replacement controller, drives, and indicators, all on an olimex sized panel, with 10mil design rules.

./RX08: Posibus version of RX8E

RX08-: is an older version of the Posibus RX08 controller.
l8r: is a somewhat newer version of the Posibus RX08 controller.
RX08: is the Posibus RX08 controller, as ordered from the board fab.
RX8E: is a drawing of DEC's RX8E Omnibus controller.
RX08b: is a revision to address problems found in the prototype.
RX08c: is another revision to address problems found in the prototype.
RX08b19: is the Posibus RX08 Controller as of 04/19/2005.
asbuilt: is the Posibus RX08 Controller as built, with all the blue wires (so far).
RX08-8-9: is the 08/09/2005 version.
RX08-3-5-9: is the 03/05/2009 version.
kludge: is the schematic of the kludge daughter board being used to debug the prototype.
kludge2: is the schematic of the kludge daughter board being used to debug the prototype.

./RX08/RX08: The Posibus RX08 files as sent to the fab (prototype didn't work).

./RX8-Ulrich: RX8E to Posibus Adapter per Ulrich Fierz

rx08-ulrich: is a schematic for Ulrich Fierz's modifications to an 8/i and a TC08 to interface the RX8E.
pbusRX8E: is an attempt to modify Ulrich's design to remove the 8/i dependency.
rx08-vrs: is another attempt to modify Ulrich's design to remove the 8/i dependency, and makes the Omnibus connections more explicit.
rx08+ulrich: is an merge of Ulrich's design with the RX8E drawings.
rx8i: is an attempt to modify rx08+ulrich to be suitable for implementation in a CPLD.

./RXM: RX01/RX02 Emulation with a PC

rxm: is a drawing of Charles Dickman's card to interface emulate the RX02 with the parallel port of a PC.

./SMT-8: Thoughts about a discrete SMT PDP-8.

adapter: is a drawing of an adapter from the DEC connector to something more current and affordable (2x20 header).
r202smt: is an SMT version of the R202 flip-flop board.

./TU56x: TU56 Drive Emulation

tu56: is a drawing for a proposed TU56 replacement using an SD card.
tu56o: is a older, less flexible version.

./W076O: W076 for either RS-232 or Current Loop

w076o: is a board to implement M8655 style interface to RS-232 or current loop for machines which use DEC's W076 card.

./Watch: PIC based timepieces

bcdwatch: is a drawing of an SMT version of a BCD wrist-watch.
watch: is a drawing of an SMT version of a binary wrist-watch.
clock: is a drawing of a binary clock using a 5704 dot-matrix display.

./WireWrap: DEC Compatible Wire-Wrap boards

1highfront: is a single-height prototyping board for narrow DIPs up to 32 pins.
1high: is a single-height prototyping board for narrow DIPs up to 32 pins.
2high: is a double-height prototyping board for narrow DIPs up to 32 pins.
4high: is an Omnibus form-factor prototype card that will take DIP packages in narrow or wide form up to 42 pins.

./X: M452 Replacement

M452sx: is a drawing of a replacement for the M452 Baud Rate Generator based on the M8655 (doesn't route).

./X8iHenk: 8iPanel Driver boards for Henk

9iSwitches: needs a description.
DeMux: needs a description.
DeMux2: needs a description.
DeMux3: needs a description.
DeMuxRow: needs a description.
DeMuxRow2: needs a description.
LEDproto: needs a description.
LEDtemplate: needs a description.
regulator: needs a description.
slot1: needs a description.

./X8iPanel: PDP-8/i Front Panel PCB

1switch: is an exploration of ideas about using reed switches to construct switch substitutes that fit in the original footprints.
M900dec: is a drawing of DEC's M900 paddle card, which contains the indicator drivers, as well as connecting to the front panel cabling.
M900: is my version of the M900 indicator driver card, which provides through-hole (ribbon cable header) connections as well as DEC's surface mount.
d-cs-8i-0-27: is a schematic of the M900 indicator sockets in the 8/i backplane.
8iPanelDec: is a drawing of DEC's indicator PCB, using the surface mount ribbon connectors.
8iPanel: is my version of the indicator PCB, allowing through-hole headers for ribbon connection, as well as DEC's original surface mount.
8iPanelLED: is a version of 8iPanel with current limiting resistors suitable for the use of LEDs instead of indicator lamps.
LEDPanel: is a version of 8iPanel with current limiting resistors suitable for the use of LEDs instead of indicator lamps.
LEDPanelmpsl: is a version of 8iPanel with current limiting resistors suitable for the use of LEDs instead of indicator lamps.
LEDPanelECOl: documents workarounds for issues in LEDpalenmpsl.
LEDPanel7-20l: fixes the known issues in LEDpalenmpsl (as of July 2020).
LEDproto: is a version of my indicator panel, broken in two, so it could be ordered from a protoype shop.
8iSwitches: is a drawing of a replacement for the switches PCB.
8iSwitchesOK: is a checkpoint of the replacement for the switches PCB.
PiPanel: is an exploration of interfacing a Raspberry Pi to the switches and lights.
G793: is a pull-up and clamping module for the switch register of the PDP-8/i.
Perspex: is a drawing of the artwork that mounts in the front of the PDP-8/i panel.
Guide: is a drawing showing placement measurements for the PDP-8/i panel.
TactileSw: is a drawing of an attempt to use two tactile switches with a slide to replace a slide switch.

./XDS32: DS32 Disk Drive Emulation

ds32: is a preliminary drawing of a replacement for a DS32 disk drive, which would attach to a DEC RF08 controller.

./XMM8i: Memory extension for PDP-8/i.

mm8i: is a start on drawing the MM8/i memory extension.

./Xeltec: Replacement for Xeltec SuperPro interface card.

foo1: is a messed up old version of the SuperPro card.
fie: is a messed up old version of the SuperPro card.
SuperPro: is a replacement ISA card to interface the Xeltec SuperPro to a PC.
SuperPro-res-moved: is a newer version of the replacement ISA card to interface the Xeltec SuperPro to a PC.

./atdh1150usb: Schematic for ATDH1150 USB JEDEC interface.

./chipfudge: Replacements for obsolete chips

AM27S13: is my board that uses a 27256 to replace the AM27S13 (but has trouble meeting the speed specifications).

./mmu6100: MMU for the 6100 PDP-8 on a chip

error: is a schematic fragment of the error circuitry.
mmu6100: is an early incomplete attempt at a 6100 with an MMU.
mmu6100x: is another incomplete attempt at a 6100 with an MMU.
mmu6100cp: is a snapshot of a nearly complete 6100 with an MMU.
ts6907: is a timeshare enhancement for the EMC 6907 MMU for the 6100.
emc6907: is a drawing of the EMC6907 MMU used with the Intersil Intercept (not the Junior).
vrs6907: is my design for an EMC6907 MMU board with the timeshare features added.

./rs-232-20ma: RS-232 converter to go in the Logic Lab

loop-rs232o: is an older version of the current loop to RS-232 converter (CTS flow control only).
loop-rs232: is a slightly newer version of the current loop to RS-232 converter, with CTS or DTR flow control.
sel-driver.sch: is a schematic of the selector magnet driver card in the TTY.

./xRK08: RK01 Disk Controller for Posibus.

rk08i: is a start on drawing the RK08 disk controller.

Last updated on 10/29/24 09:33

vrs