On 7/13/2020 2:02 PM, Chuck Guzis via cctalk wrote:
On 7/13/20 11:18 AM, Jim Brain via cctalk wrote:
The Tandon 848 is not one of my favorite drives. There is an option not
to pass the Motor On/ signal unless a disk is loaded and the drive door
is closed. Check U16 pin 8, which should be high for MOTOR ON.
I will do so.
It seems more like an oversight that all 4 drives don't spin. Be aware
that the 848's motor controls are different from 5.25", where one line
controls all motors. The 848 uses pins 4,6,8 and 24 on the interface to
control the motor--each drive has a jumper that dictates which line will
be used. (MC 1-4).
Yep, one of the drives was set to DS2, so I moved it back to DS1 so I
could test as a primary drive. I agree the drives would be different
from 5.25" ones, but I connected them to the same PSU that runs my
TM848E successfully. It seems strange that a working PSU that drives a
TM848E would not supply enough or the right voltage for a TM848-02.
Jim
