12 Aug
2021
12 Aug
'21
8:39 a.m.
I would think Herb would have some valuable input, but I do know with the
SA800's there are a lot of jumpers, they vary based on the rev of the
board, and you want to be sure that the loading of the heads is not jumper
dependent. NOTING that I am only being logical not technical. I would
only look to cross jumpering related to the drive head control off the list
of possible causes.
Bill
On Thu, Aug 12, 2021 at 11:26 AM Jonathan Chapman via cctalk <
cctalk at classiccmp.org> wrote:
Does anyone have experience running the MTI MXV22M?
It's a dual-height
QBus card that emulates RX02 but uses a 5.25" 96 TPI drive. I've got a
small heap of them and we're trying to get them going.
When trying to format diskettes using the process documented in the
manual, the drive selects for maybe a second then deselects, and we get a
drive not ready error. The controller isn't using the ready line, as the
SA-460 for which it is designed doesn't supply it. No traces physically
connect to pin 34.
Since we're close to out of ideas, we've also plugged in a pair of Shugart
SA-800s, on the idea that maybe the MXV22M is close enough to the MXV22 to
show some signs of life. It doesn't give a drive not ready error, and it
will step the heads like it's really formatting, but never loads the heads.
Happy for any input on this one!
Thanks,
Jonathan