Attempting to repair a 1050 Disk Drive-no activity light no motor/head spin

[1050]

There is an issue with some OS chips that are coded

for a different stepper motor timing that may be at

fault for the stepper motor error showing up. Wrong

OS could easily not be accounted for in the source

code for the test disk.

 

A nebulous place for certain, but a reminder that all

is not perfect under the Atari umbrella. End of the day,

it works flawlessly, there may be nothing that can

be done anyway. Outside of extensive code examination

and most of us have something better or more fun to

do than that.

 

IIRC, the code for the 1050 OS was found to contain

some self test errors and a corrected version supplied

by a couple of germans long ago. You might want to go

there and get a new OS rom burnt with the corrected

code to test again?

http://atariage.com/forums/topic/273221-dd-disc-track-structure-kryoflux-image/?do=findComment&comment=3917681

 

The self testing sections begin at FAC4 in the

a8_print_tmp3.txt which is the assembly report of

that project.

[+Nezgar]

IIRC, the code for the 1050 OS was found to contain

some self test errors and a corrected version supplied

by a couple of germans long ago.

 

Interesting idea, I've definitely reacall that particular test PASS with a stock Atari 1050 firmware, but not sure which Rev it was. I have Rev J, K, L all handy on 2732's I'll have to try each and see if any of them fail that test with my drive... It also passes using uploaded stock 1050 mode on a happy drive, again not sure which Rev that uses.

[repetto74]

Hi Nezgar,

 

I formatted again the diskette after the speed adjustment and you were right. All tests passed . Thanks a lot the 1050 is back to business!

[+Nezgar]

Hi Nezgar,

 

I formatted again the diskette after the speed adjustment and you were right. All tests passed . Thanks a lot the 1050 is back to business!

 

Excellent, congrats! Your 1050 is now in tip-top shape, should be good for another 30 years.

[repetto74]

Excellent, congrats! Your 1050 is now in tip-top shape, should be good for another 30 years. 

 

I hope so!!

[_The Doctor__]

a drive formatted to itself will pass it needs a known good disk from elsewhere to be sure... please understand, Chances are it is perfect but... a bad alignment means it all works on that drive or all drives aligned to it the same alone. These are the cautions I used when explaining some of this. Perhaps I am being too much of a perfectionist. But disks make their way around the world and I like to be sure.

 

If you can load protected electronics arts titles etc you are more than likely golden...

 

-That's my 2 cents, for what it appears to worth.

[repetto74]

a drive formatted to itself will pass it needs a known good disk from elsewhere to be sure... please understand, Chances are it is perfect but... a bad alignment means it all works on that drive or all drives aligned to it the same alone. These are the cautions I used when explaining some of this. Perhaps I am being too much of a perfectionist. But disks make their way around the world and I like to be sure.

If you can load protected electronics arts titles etc you are more than likely golden...

-That's my 2 cents, for what it appears to worth.

 

 

I will try to dig out some Atari disks somewhere and test the drive with them .