my CP/M-80 pile'o'gunk

From: Fred Cisin <>
Date: Fri Dec 10 17:34:56 2004

> Tom asks:
> > I can RTFM, but is this a handwired cable? Is there any vestigial
> > correspondence between floppy pinouts (3.5, 5.25. 8)?!

On Thu, 9 Dec 2004, Eric Smith wrote:
> 3.5 and 5.25 are the same, but 8 is completely different.
> If you want to *write* 8-inch disks, you need something to generate
> the TG43 (Track Greater than 43) signal that controls the write
> current. Not necessary if you only want to read.
> The D-Bit FDADAP floppy disk adapter can be used if you don't want
> to wire up a random cable. It also has a PIC that generates the TG43
> signal.

if you don't need the TG43 signal, the rest of the pins are sequenced
relative to each other similarly enough that you can crimp a cable,
with just a few wires that need to be changed around.

Grumpy Ol' Fred
Received on Fri Dec 10 2004 - 17:34:56 GMT

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