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View Full Version : Realigning a 1541-II drive (Commodore 64)



Sabz5150
02-05-2012, 10:34 AM
The inevitable happened, drive did a good ol series of WHACKACKACKACKACKACKA against the track zero stop and now its misaligned and won't read squat. I've seen a few howtos on realigning the classic 1541, but nothing on the 1541-II drives. Any suggestions or help on how to realign the heads?

Thanks!

Pete Rittwage
02-05-2012, 12:15 PM
The reason there are no docs for it is because it shouldn't be possible for it to go out of alignment. I thought that all 1541-II's had optic track 0 sensors and didn't bang the heads... Possible the sensor is malfunctioning if you got head bang.

It's more likely something actually broke, unfortunately.

Sabz5150
02-05-2012, 02:15 PM
The reason there are no docs for it is because it shouldn't be possible for it to go out of alignment. I thought that all 1541-II's had optic track 0 sensors and didn't bang the heads... Possible the sensor is malfunctioning if you got head bang.

It's more likely something actually broke, unfortunately.

The 1541Cs and 1571s have optical track 0 sensors. According to documents I have found, "The support for the optical "track 0" sensor, which was introduced in the 1541C firmware, was removed in the 1541-II firmware".

Also the 1541-II machineguns when attempting to reset to track 0. That's a dead giveaway.

FABombjoy
02-05-2012, 03:24 PM
Quick dumb question: Have you initialized the drive?

I'm nibtooling a bunch of disks right now, and every once in a while nibread's head bump routine knocks my drive out until I send the initialize command.

Sabz5150
02-05-2012, 04:31 PM
Quick dumb question: Have you initialized the drive?

I'm nibtooling a bunch of disks right now, and every once in a while nibread's head bump routine knocks my drive out until I send the initialize command.

Aaaaah, let me try that. Will let you know. Thanks!

Sabz5150
02-05-2012, 05:42 PM
Quick dumb question: Have you initialized the drive?

That did the trick! Thanks again!

Time to bind that command to a function key a'la U36 :)