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ryomuk / test4004

Test system for Intel MCS-4 (4004) micro computer set
MIT License
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1.0 "Calc" code and Schematic? #1

Open slobdir opened 1 year ago

slobdir commented 1 year ago

This was a very interesting project. I wire wrapped something like your Version 1.0 board and I found a few errors in the 1.0 schematic around the 6268. the I/O's should be 1-4: 15,14,13,12 and the /WE_OPx should be pin 11. Are these the only issues?

Also, I could not get SQR or D to work in the CALC.ASM code. Was there an update to the code, this may have been mentioned in your blog? Thanks!

ryomuk commented 1 year ago

Thanks for your interest and the error report. I have corrected the schematic and updated to rev.1.01. As for the CALC.ASM, previously I found a bug and uploaded the fixed version on Apr.14. I recompiled it and run on the board. It works fine and I found no errors. I am using 4002-2 (not 4002-1) for RAM2 and RAM3, but it should not matter.