Search found 3 matches

by Colin
19 Nov 2019, 10:10
Forum: Kit assembly gallery
Topic: Not easy, but working
Replies: 4
Views: 180

Re: Not easy, but working

I'll give you easier to understand. (I've just always fancied the idea of designing a screamingly fast 1-bit pipelined ALU.) Anyway the Gigatron is great fun and very clever, especially building in the display. I'll be off to show it to friends in the pub tomorrow, both of whom worked on processor l...
by Colin
18 Nov 2019, 20:35
Forum: Kit assembly gallery
Topic: Not easy, but working
Replies: 4
Views: 180

Re: Not easy, but working

It was D19. I was just scoping around the board looking for bad logic levels. The top of that diode showed obvious signs of two outputs fighting each other. (Half rail levels.) I did destroy the diode removing it. Cut in half, drop out the bits and then suck out the holes. There were two spare diode...
by Colin
18 Nov 2019, 10:04
Forum: Kit assembly gallery
Topic: Not easy, but working
Replies: 4
Views: 180

Not easy, but working

I have 50 years experience building electronics. I design electronics for a living and back in the 70s designed processor boards for mini-computers. However even using a professional equipment, this kit was a challenge. It took about three hours to build and another hour to debug. Once finished it w...