Re: über IIgs

[Roy and/or Janet Miller <millers@inetnebr.com>]

**** **** wrote:

> This makes it obvious I still have a great deal to learn. S100 I believe
> refers to the Altair, does it not?

Yes. Altair, who invented it, called it the Altair bus. Other makers, not
unnaturally, didn't wish to refer to the bus in their computer by a competitor's
name, so, since it had 100 pins, they called it the S100 bus.

> CP/M runs on z80 based machines,

The "80" in CP/M 80 refers to the Intel 8080. The Z-80 runs Intel software.

> but It's
> never really been clear to me just what those are. The only z80 machines I'm
> familiar with are those models made by tandy.

The Kaypro, the Osborne, Compupro, and many, many others.

> The z80 seems to have been
> much more popular in arcade machines,

Well, it was used in the Timex/Sinclair machines, the NEC PC 8000 series, as
well as in the ColecoVision/ADAM. It's a very capable 8 bit chip, with 16 and 32
bit versions available today.

> than it ever was in home computers.
>
> John

Roy