That's good feedback, thanks. It's not the only problem. I
couldn't get CP/M to switch to a different drive. If you copy
that same file to 3 other names like DISK-B.BIN, DISK-C.BIN and
DISK-D.BIN. Then try changing to B: it crashes CP/M. My BIOS
routines to select the working disk does work, because it's used
in the selecting of DISK-A.BIN. This bug had me scratching my
head. Now I see there's another bug. Of course, like any
lunatic, I carry these bugs around in my head and about 3 weeks
ago while driving I had the idea that I might be running short
on stack space! My routines to change the drive nest pretty
deep. Your bug report could be from the same problem.
Hopefully, this is the problem, and I can fix it after VCF MW.
It's 1 week to VCF MW! I'm almost ready, just a few last minute
things. All the systems I'm presenting are in working order.
It's been like a "Repair Marathon" for the past 8 weeks or
whenever it was that Matt Turner came over for a visit.