To David Fry:
I presume you are out of these PC boards now. But the circuit is simple enough to hand-wire, just a little tedious; I can do that. (Or someone who produces boards is welcome to contact me.) Thanks for pointing to the originating site for PC-parallel programming support, schematics, etc. I presume you are using those programs. Already I see issues, excuse me if you have worked around them:
1) old MS-DOS software that operates old PC parallel ports, won't run under 32-bit Windows - I/O calls evoke a "protection error". These programs "need" to be run on an old PC with 16-bit MS-DOS; not under the Windows "DOS command line" box.
2) a quick look at the ZIPped files, suggests the text and ASM may be in some Wordstar-like format with bit 8 set; I see some character "garbage" using a plain text-based editor and a hex editor. Did you have that problem, if so how did you correct it? I'll poke at it on my own.
3) hopefullly the .COM files are not damaged - did you use those as provided in the ZIP file? Or did you reassemble?
4) Currently the N8VEM Web site requires "login" for ordinary people to access. This appears to be unintended. But since I have no password (and won't request one) I have no access. I won't need the CAD files but it would be a courtesy if you could send them to me, or point to some non-protected web site who will have them.
GALs are often encountered in 1970's and early 80's microcomputers - Compupro for example. So it's good of you to make this old resource, more convenient for others. I may put this stuff on my Web site, if I produce a working card. A brief check of source files suggests the originator was "(C)ChaN, 1995-1997" - they should be given credit too.
Contact me c/o my Web site if you please, for various reasons I don't often come "here". Thanks!
Herb Johnson
retrotechnology.com