20 Aug
2015
20 Aug
'15
1:57 p.m.
On 08/20/2015 01:04 PM, Marc Verdiell wrote:
So I tried to force formatting in DOS at 360k, and
sure enough it
worked! I can then read the diskette back, write on it, etc... And of
course it failed formatting at 1.2 Mb. But the drive (Chinon FR-506)
is a 1.2M one, and reads fine at 1.2M! Any clue? Is there a drive
setting that would prevent it to write at high density but let it do
at low density?
At high density, have you taken a good look at pin 2 of the floppy
interface? Have you checked to see if pin 2 is configured (via jumpers)
as "density select"? Various drives have different jumperings for
pins 2 and 34 (and sometimes 4). For example, I deal with some Japanese
CNC gear that uses pin 2 for disk change and pin 34 for read (and pin 4
for "in use".
--Chuck