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 listReceived on 2014-07-19 18:00:33
Archive generated by hypermail 2.2.0.