That's a Miniscribe 3650, I presume. (Or it's RLL brother, 3675) I sold many of them back in the 80's, and I'm quite familiar with them. It's been left in burn-in test mode. I THINK the first three jumpers have to be in place for normal operation - if one's nicked, it goes into one of several test modes. One is a "fanout" seek test, the other a random, another a sequential step test. it's been a VERY long time between drinks. Have a play with the first 3 jumper positions (the ones on the edge over the narrow edge connector). GL Julian : > On 07/19/2014 07:38 PM, Michał Pleban wrote: >> >> Remember again that this is without the controller attached. Attaching >> the controller, the controller to the computer etc. has no effect. The >> computer is unable to communicate with the drive as it performs its head >> dance - all operations result in timeout. >> >> Do you possibly have any idea what is going on with the drive? I thought >> that maybe it doesn't like the voltage from the CBM710 PSU, but I doubt >> it - the whole computer runs on it flawlessly (including the floppy >> drive). Or maybe something was broken when I attached the CBM610 PSU and >> learned that it is too weak to spin the drive? But in any case, this >> would be very strange symptoms of a power failure. > All the drives I have seen have some kind of microcontroller on them. > Along the lines of a 8049 or 8051. Take a closer look what you find on > your drive. Could be an EPROM-based controller (e.g. 8751) that is > slowly losing the contents of the EPROM part due to age. > Gerrit > Message was sent through the cbm-hackers mailing list -- Best regards, Julian mailto:email@example.com Message was sent through the cbm-hackers mailing listReceived on 2014-07-20 00:00:02
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