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echo: electronics
to: Peter May
from: MIKE ROSS
date: 2002-12-10 08:48:46
subject: Those old expensive Floppy disks!

"Peter May" wrote to "Greg Mayman" (08 Dec 02  11:19:00)
 --- on the topic of "Those old expensive Floppy disks!"

 PM> Years ago I threw out a heap of single sided shugarts and similar 5
 PM> 1/4 inch floppies.
 PM> I would never need a single sided floppy drive again. My 64K IBM PC
 PM> with 160K floppy was long gone with the Cromenco, Kaypro model IV CPM
 PM> luggable and anything else that used them.
 PM> A year ago I got an old EMU Systems Emulator synthesiser/sampler MKI
 PM> to restore, and you guessed it!
 PM> The single sided floppy is dead! I cant find one anywhere!I havent
 PM> figured out how to make it work with a 360K drive so that it will read
 PM> its single sided system disks.

Seems to me I'd head straight for the head select pin on the edge
connector. IIRC it's pin-32 which selects the upper head-1 when low and
the lower head-0 (what we want) when pulled high. Maybe a little piece
of masking tape over that pin would do it. Make sure the drive has a
termination pack so the pin stays high and not simply floating. It
should work once the drive select and ready jumpers are in the correct
configuration for the synth's controller protocol. I can't think of
anything else unless the drive was non-standard.

 Mike
 ****

... You mean 15" sparks are SUPPOSED to come out of this thing?!?
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