Here are my collection of CAD files. Beware -- almost none of this stuff has been built or debugged! It is just here in case it is of some use to someone.

Here are some CAD libraries that are used in the boards that follow. I use Eagle CAD software with the "Pro" license to develop this stuff, but you should be able to use and view it with either the freeware license or the non-profit license.

74xx-JameCo

This is an attempt to put together a library that contains the subset of 74xx TTL that is actually available from JameCo. The idea was that if it is in this library, you might actually be able to buy it affordably, so it was "safe" to design with. Of course, what JameCo actually carries is a moving target, so the correspondence is no longer perfect.

dec-con

This is a collection of board outlines and the occasional obsolete component, which will be useful if you are trying to re-create flip-chip modules. There are outlines and edge connectors for single, double, quad and even hex-height boards.

You will need to set the "Copper/Dimension" design rule to 25 mils, to eliminate a diagnostic about copper too close to the edge in the edge connectors.

You will also want to set the routing grid to 25 mils (or other submultiple of 100 and 125 mils). Otherwise it will be difficult to route from the edge connector to the components, as the edge connector uses a 1/8 inch grid, and the components typically use a 1/10 inch grid.

dec-m

This is a collection of symbolic representations of various DEC flip-chips. For instance, everything needed to draw the prints for a TC08 DECTape controller is here. Despite the name, there are Gxxx and Wxxx modules, in addition to Mxxx modules. The package is one or more H807 connectors, which you can arrange to form your controller backplane. (I recommend arranging them into standard 2x4 connector blocks, or you will have an even harder problem getting compatible connectors!)

You will want to set the board grid to .125 inch, to get proper placement of the parts. Even so, you may have to move them to get them on-grid, as Eagle tends to place them with incorrect alignment initially.

dec-r

This is a collection of symbolic representations of various DEC flip-chips. It has newer versions of the stuff in dec-m, as well as a number of Rxxx modules. Most of what is needed for the PDP-8/S is there. Note also that the Sxxx and Bxxx families are essentially faster (and faster yet) versions of the Rxxx module with the same number, so you can just over-ride the "value" of the Rxxx version to Sxxx or Bxxx.

You will want to set the board grid to .125 inch, to get proper placement of the parts. Even so, you may have to move them to get them on-grid, as Eagle tends to place them with incorrect alignment initially.

And here is a scrollable list of my collection of various schematics and boards. There is no documentation here, so you pretty much have to know what you are looking at, and it may not be obvious which of the zillion boards and schematics is what you want. This list is automatically generated, so if there is stuff in it that I should not be republishing, let me know..

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