I still need to post the final schematic. A new thread might be a good idea.
I wanted to keep the board as simple as possible so one could just wire wrap or point to point it. It only has a 7474, 7402 and a 7404 as well as the EPROM. It could easily be done with a GAL or PAL and the EPROM. I think two schematics showing each would be best. Dwight ________________________________ From: cctalk <cctalk-boun...@classiccmp.org> on behalf of Ali <cct...@ibm51xx.net> Sent: Sunday, November 6, 2016 10:25:16 PM To: 'General Discussion: On-Topic and Off-Topic Posts' Subject: RE: KIM-1 Debugging tool > I've been making a debugging ROM board to test out the various > > parts of the KIM-1. It is based on taking over the KIM at reset > > and running test. > > So far I've got two test working. One is a basic, is it running test > > that just blinks a light on the debug board. > > The next is a test of the first 1K of RAM. > > A little tricky to do without RAM. > > I expect to write some more for the RRIOT ics. > > If anyone has interest, they can follow me on the Vintage > > Computer Forum or contact me here. > > The board has 3 ttl ICs, a 2764/27128 EPROM, a couple > > LEDs and a dip switch. Also a few pullup resistors and capacitors. > > Dwight Dwight, That is a pretty cool project. May I suggest you break it out on VCF into its own thread so people can more easily follow what is going on? For those interested in the original thread: http://www.vcfed.org/forum/showthread.php?52155-KIM-1-No-Action/ -Ali