[Coco] 2764 EPROM

[Darren A.]

If anyone is interested in getting ROM Pak boards made, I have uploaded a 
set of 274X Gerber files and an Excellon Drill List file to CoCo3.com:

http://www.coco3.com/users/DarrenA/ROMPakBoard.zip

I've never had boards manufactured, so I don't know if this is adequate to 
get the job done or not. At the very least, it provides a circuit layout for 
someone else to work from. I'm pretty sure the design is correct, but I 
can't gaurantee anything. If anyone has a Gerber Viewer and would like to 
check my work, please do.

The circuit will accept a 2764, 27128, 27256 or 27512 EPROM (only the upper 
16K of a 27256 or 27512 can be addressed). There are pads for jumper posts 
that connect the A13 pin on the EPROM to GND, +5V or A13. It also has jumper 
pads for enabilng Auto Start.

If anyone does manage to produce a number of boards from this design, I 
certainly wouldn't mind getting one or two for myself :).

Darren

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