Tim,
Your getting a little deeper than I've been. I was just a poor CP/M
hacker. I wasn't aware that there was an API spec for CP/M. Any program written
for CP/M would run on any machine running running CP/M. All the drivers were
installed in CP/M by the machines mfg.. It was rumored that the CP/M copyright
was still in the original version of DOS 1.1. I seem to remember seeing it been
maybe it was just the Assembler copy right left behind.
Right on about IBM pricing out Concurrent CP/M. The difference was one
was on the shelf the other had to be ordered and was 4 times the cost. In the
end IBM did it to themselves. ;-)
Regards,
Larry
HI100@xxxxxxx wrote:
> <<
> I disagree, Tim Patterson at Seattle Computer Works wrote Ms Dos based on
> using the published API interface spec for CPM80. He just went to a local
> store and bought the API spec in a book. Concurrent CP/M was a much better
> later product by D.R. that shared some of the basic API but extended it to
> multi-tasking. You could buy either PcDos(MsDos) or CPM86 and later
> concurrent CPM86 with the original PC, but the IBM pricing structure made it
> a no brainer for most users to buy PCDos (MsDos).
>
> Regards,
> Tim Hughes
> >>Hi100@xxxxxxx<<
>
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