On Fri, May 14, 2021 at 6:25 PM Jeffrey Brace via vcf-midatlantic <vcf-midatlantic@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. -ethan P.S. - it's related to the theme for the upcoming VCF East so I'd like to get this working.