14 Jan
2022
14 Jan
'22
1:31 p.m.
It was my understanding that only the Altair backplane had a different row spacing for it's connectors. Everything that I have seen since (IMSAI, Ithaca, TEI, CompuPro, Cromemco) used the same .250 row spacing.
The Byte Shop BYT-8 and Polymorphic Poly-88 both use the narrower spacing too. I don't know if later Polymorphic systems do too. There are probably others. Haven't checked on my TDL stuff. Thanks, Jonathan