Floppy drive track-0 issues
ard at p850ug1.demon.co.uk
Mon Jan 11 12:54:33 CST 2010
> > the arm. And yes, single-head 3.5" drives do exist (as for that matter to
> > 40 cylinder ones -- 67.5 tpi)/
> The Shugart SA300 single head 3.5" drive was ued in the Gavilan, with a
> custom bezel. The SA350 DS 3.5" drive could use that bezel and there was
> eventually DS support (GAVILAN MS-DOS 2.11 K?)
> Which SS 3.5" drives were out before that?
I assume the Sony was one of the first. I can't remember the model number
of the drive (I can look it up), it's full height, 600 rpm, with a 26 pin
connector. Used, for example, in the HP9121.
> The only 67.5 TPI drive that I have is an Epson. Who else made them?
The only one I've seen is the one used in the Epson portable floppy drive
(PF10 or something like that) for their CP/M, etcc, laptops. That's a
strange unit, the drive doesn't have its own logic board, therer's a
single board with the cotnroller, CPU, firmware, read/write amplifier, etc
on iot. Alas the CPU chip in mine has failed. Fortunately it's ROMless,
so there's some hope of getting a replacement, it's one variant of the
6202 in a surface-mount package. Again I can dig out the number if anyone
thinks they know a source...
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