[vcf-midatlantic] Cp/m for c128

Ethan Dicks ethan.dicks at gmail.com
Sat May 15 01:42:02 UTC 2021

On Fri, May 14, 2021 at 6:25 PM Jeffrey Brace via vcf-midatlantic
<vcf-midatlantic at lists.vcfed.org> wrote:
> > Be advised that I think there were tweaked improved versions produced.
> Very interesting. I wonder if someone has tracked all the versions and
> differences.

If someone has, I would like to know.  I have a (vintage) CP/M program
that works fine on one version of the C-128 CP/M disk and doesn't work
on another and I've hesitated sharing it until I see more evidence of
reliability.  In particular, there's a BDOS call to get a menu prompt
from the user and on an Altair emulator and CP/M 1.4 it works fine.
On the C-128 with CP/M Plus, I had one disk image where it worked and
one where it froze.  It's a really basic call to read a single char
from the console device.  It _should_ just work.  I was not successful
in tracking down the source to that call to see how it was implemented
on the C-128.  I would love to see some sort of list of what was out
there so I can get a handle on the scope for further testing.


P.S. - it's related to the theme for the upcoming VCF East so I'd like
to get this working.

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