So in addition to everything else I'm working on fixing a TU58 drive. It's one of those "Got to do one thing, then another then...." kinds of projects. So far I have:
Anyway I'm trying the 11/23+ bootstrap. When I type Boot dd0: I get:
TRYING UNIT DD0
ERROR UNIT DD0
ERR 14 DRIVE ERROR
Same issue with DD1:. The motors do start and seem to move forwards and backwards for a second then it throws a fault.
So.... First I'm wondering if the puck size is wrong. Looking at the technical specifications I see the drive motor puck has a radius of .273. Mine now is probably about .5 I'll check with a caliper but how critical is that measurement? Is there a specific tube type I should be using (and if so can someone with a lifetime supply send me some?)
Second, where would be a good place to start looking for issues? Any thoughts?
- Fixed the power supply so I have solid +5 and +12 volts.
- Gotten it cabled to a pdp11/23+ CPU (10 pin ribbon cable, right orientation)
- Replaced the crumbled puck rubber with new .5 inch tubing
- Gotten the unit to pass internal diagnostics (LED comes on for 1/2 second, off for 1/2 second, then solid on)
- Verified baud rate and interface type (9600/9600, RS232)
Anyway I'm trying the 11/23+ bootstrap. When I type Boot dd0: I get:
TRYING UNIT DD0
ERROR UNIT DD0
ERR 14 DRIVE ERROR
Same issue with DD1:. The motors do start and seem to move forwards and backwards for a second then it throws a fault.
So.... First I'm wondering if the puck size is wrong. Looking at the technical specifications I see the drive motor puck has a radius of .273. Mine now is probably about .5 I'll check with a caliper but how critical is that measurement? Is there a specific tube type I should be using (and if so can someone with a lifetime supply send me some?)
Second, where would be a good place to start looking for issues? Any thoughts?