[Coco] MC-10 mistakes was Re: [Color Computer] What's wrong with this Picture
James the Animal Tamer
emucompboy at yahoo.com
Tue Apr 19 15:00:17 EDT 2005
> James and all,
> IMHO the worst mistake Tandy made with the MC-10 was putting the
> hard-wired BASIC ROM system hooks between the video RAM and the
> RAM. This relegated medium res graphics to assembly only as BASIC
> crash if one tried to increase video RAM in BASIC. If they had put
> video RAM directly adjacent to the program RAM one could change the
> bottom or top of the BASIC program space to add RAM to the video as
> did on the big CoCos.
Yup, you're right about all that!
> As far as I know the only way to increase the video RAM was to
> add real 4K of physical RAM below the video RAM space; I've been
> to find the instructions to do this for 20 years. I was in touch
> the Green Mountain Micro guy Dennis Kitz (sp?) for a time and he
> promised to look up the details for me. But I lost his email
> a hard drive crash.
There was one fellow in the MC-10 club who did things like this...
don't remember his name. But, with such a mod, the computer wouldn't
exactly be an MC-10 any more.
BTW, the Alice 32 and Alice 90 don't have this problem. But then,
they're not MC-10 any more.
> I loved the MC-10 in 1983 and still do. The MicroColor BASIC 1.0 on
> ran at least 50% faster than on the big CoCos.
'sides, the CoCos had the "double the clock speed" poke.
> It taught me most of what
> I know about hacking and assembly. I converted or wrote many
> for it including a spreadsheet, word processor,
> graphics/drawing/printing program, educational and demo programs,
> in 1983-85 but no one seems to be interested in them even now...
I'm interested. Digitize those tapes (WAV, stereo, 8-bit, 44100
samples/second), and mail 'em to me or use the casinlog program to
make them .CAS, and I'll have them on the next update of VMC-10.
Share your work with the world (well, actually, with the four or five
people who would download the next VMC-10)!
Brought to you by the 6809, the 6803 and their cousins!
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