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The S-100 (later the IEEE696) bus is a backplane standard introduced in 1975 supporting configurable card types.

4
votes
1answer
The S-100 bus had 8 data lines, logically enough since it was originally used with the 8080 and then Z80 CPUs. However, it actually had two sets of 8 data lines. The reason why is discussed in Why we …
asked Apr 3 '19 by rwallace
5
votes
3answers
The S-100 bus was extremely versatile; originally designed for the 8080, computers using it had no trouble with the Z80 as a drop-in upgrade, and it even went to 16-bit with the 8086. To my surprise, …
asked Nov 14 '20 by rwallace
8
votes
1answer
The Altair 8800 was based on what came in later years (much to the displeasure of MITS) to be known as the S-100 bus, because it had 100 lines, because MITS found 100-pin edge connectors were availabl …
asked Nov 11 '20 by rwallace
3
votes
0answers
How many machines for which CP/M was the primary operating system (so not counting the Commodore 128) ever shipped? I would also be interested in knowing how many S-100 machines ever shipped. I get t …
asked Apr 30 '17 by rwallace
11
votes
1answer
The S-100 bus was something of an industry standard in the 1970s, for 8080 and Z80 computers built on a backplane design. It was invented with the Altair 8800, which apparently provided 16 or 18 expan …
asked Dec 24 '19 by rwallace
10
votes
2answers
It is said that the S-100 bus provided a standard hardware format for expansion cards across many models of computers, including ones using different system software and even different CPUs. Having p …
asked Jan 24 '17 by rwallace
9
votes
3answers
Many Z80 computers in the seventies and early eighties used the S-100 bus, into which you could plug many kinds of expansion cards. Would it have been possible to plug suitably designed game cartridg …
asked Sep 19 '17 by rwallace
18
votes
3answers
The Altair 8800 typically, at least in the early years after its release in 1975, operated with no more than a few kilobytes of memory, for the excellent and sufficient reasons that memory was expensi …
asked Nov 8 by rwallace