On Thu, Jan 13, 2022, 11:02 AM Herb Johnson via vcf-midatlantic < vcf-midatlantic@lists.vcfed.org> wrote:
It wasn't clear if they (Goodman) is offering what they call "unbuffered" or "plain" S-100 prototype boards. The buffered board is apparently expected to be memory or I/O, not a processor board or bus-controlling board such as a new-designed 8080 board as Joe Giliberti may be considering. And without detailing the differences, there's different flavors of S-100 bus; Joe may desire the earliest kind for IMSAI/MITS operation.
Josh's "Sea of Plated Holes" Board tries to address this by offering only a row of 74LS245 bus transceivers therefore maximizing the prototyping area. See here for an illustration => < http://s100computers.com/My%20System%20Pages/Mini%20Buffered%20Prototype%20B...
And it's hard to find S-100 connectors below $10 a pop, for that matter, they are often more. It's not appreciated, that S-100 PC mount connectors came in two pin-widths between the two rows. Different brands of backplanes used one or the other. It's a gotcha to buy the wrong width connectors for a particular unpopulated backplane.
So much for "standard" S-100. ;)
Regards, Herb Johnson
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. Regards, Jeff