C64-C128 CP-M Cartridge Interest
cclist at sydex.com
Sat Dec 25 14:18:57 CST 2010
On 25 Dec 2010 at 13:02, Eric Smith wrote:
> Tony Duell wrote:
> > I beleive the historay can be traced back to the MCS8i system.
> This, > AFAIK, never had disks, and never ran CP/M. But it's
> 8080-based and > amazingly it has a CPM-like IOBYTE at location 3.
> It's not that the Intel development systems had a CP/M-link IOBYTE.
> It's that CP/M has an Intel MDS-like IOBYTE. Remember that Gary
> Kildall wrote software for Intel before writing CP/M, and that CP/M
> was written to run on an MDS
...and IOBYTE wasn't universally implemented among OEMs. It was an
optional feature of the BIOS in the early days of CP/M. I can
probably find some words in the System Alteration Guide to that
effect, if anyone's interested. Other than STAT and PIP, I'm not
aware of any standard CP/M utility that cares about it--or supports
the additional "extended" device names.
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