25 Mar
1999
25 Mar
'99
2:59 a.m.
Does anyone happen to have, in some vast catacombs of
old manuals/docs,
the jumper info for a Panasonic JU-475-2GRJ 5 1/4" floppy drive? Or maybe
you can shed some light on what the following sections/jumpers might do?
. . .
I'm trying to get this drive working with my ATR8000 (recently resurrected
from the dead) and am not having much luck formatting disks with it. Any
help would be much appreciated.
The Panasonic (AKA Matsushita (AKA Shugart)) #475 is a "1.2M" drive.
The ATR8000 formats that I have seen were "720K" (in this case actualy
about 800K), also once known as "QUAD density", NOT "high density".
It'll
be a LOT easier if you can find a 5.25" 720K drive. In the case of the
Shugart/Matsushita/Panasonic, that would be the #465. (and #455 is the
360K model)
If you don't have a choice, then you will need to either jumper or modify
the drive for 300 RPM operation (default on 1.2M is 360RPM), and jumper
or modify the write current for low density operation (aka 360K mode),
while still permitting the 96TPI track density. Typically 1.2M drives
change the track density along with the recording density.
SOME revisions of the #475 could be set right, some required some
minor board modifications.
For TEAC drives, look for the 55F (1.2M), rather than the G model (1.2M).
--
Fred Cisin cisin(a)xenosoft.com
XenoSoft http://www.xenosoft.com
2210 Sixth St. (510) 644-9366
Berkeley, CA 94710-2219