9 Feb
2013
9 Feb
'13
9:21 a.m.
At 01:27 AM 2/9/2013, Charles wrote:
I tried this program tonight, after making up a new
ribbon cable that
had some mechanical damage which I was *hoping* would fix things :P
A very interesting result - when I hit run, BOTH drives started
seeking and eventually Drive 1 faults. If I unload one of the drives,
the other one seeks when the test program is run. Doesn't matter if
unit 0 or 1 is the active drive!
Time to start chasing a hardware (drive select) problem I guess...
sigh. Nothing like 30-40 year old hardware...
That's what I was worried about. You're lucky that it hasn't scrambled
the OS on your drives. :)
-Charles
ps I think your "assembly listing" has a bug, at 0221 shouldn't that
read JMP 0204?
Yup. The original for this (from the RL01/02 pocket service guide)
didn't have anything to do a drive select so I added it in. That
shifted everything, leading to all the offsets shifting. I missed
fixing the comment there, but jmp to 0204 is correct.
-Rick