High performance coprocessor boards of the 80s and 90s - was Re: SGI ONYX

Liam Proven lproven at gmail.com
Fri Apr 22 11:59:19 CDT 2016

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.


GEM ran on MS-DOS, DR's own DOS+ (a forerunner of the later DR-DOS)


... and on the Atari ST's TOS, derived in part from CP/M-68K.


The only BBC copro that could run GEM, AFAIAA, was the BBC Master 512
with the Intel 80186.


Liam Proven • Profile: http://lproven.livejournal.com/profile
Email: lproven at cix.co.uk • GMail/G+/Twitter/Flickr/Facebook: lproven
MSN: lproven at hotmail.com • Skype/AIM/Yahoo/LinkedIn: liamproven
Cell/Mobiles: +44 7939-087884 (UK) • +420 702 829 053 (ČR)

More information about the cctech mailing list