22 Apr
2016
22 Apr
'16
9:59 a.m.
On 20 April 2016 at 17:32, Pete Turnbull <pete at dunnington.plus.com> wrote:
The Z80 CoPro ran CP/M - real licensed CP/M 2.2, not
the bastardised
often-not-compatible "CPN" lookalike offered by Torch, and came with GEM and
various office software.
Hang on. I think you're conflating 2 different coprocessors and their
software here.
GEM didn't run on CP/M. It was considerably too big and too complex
for an 8-bit CPU.
GEM's graphics API, the VDI, was partly based on Digital's Research's
CP/M graphics API, GSX, though.
https://en.wikipedia.org/wiki/Graphical_Environment_Manager
GEM ran on MS-DOS, DR's own DOS+ (a forerunner of the later DR-DOS)
https://en.wikipedia.org/wiki/DOS_Plus
... and on the Atari ST's TOS, derived in part from CP/M-68K.
https://en.wikipedia.org/wiki/Graphical_Environment_Manager#Atari_versions
The only BBC copro that could run GEM, AFAIAA, was the BBC Master 512
with the Intel 80186.
http://chrisacorns.computinghistory.org.uk/Computers/Master512.html
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