8" disk drive questions...

[Fred Cisin]

On Sun, 31 Oct 2021, Chuck Guzis via cctalk wrote:
> Gene, are you certain that these aren't "flippy disks" (two index
> apertures)?

And, if you punch a THIRD hole, then the disk could be used DS, OR Flippy!


One of my first products to market, the "Berkeley Microcomputer FlipJig", 
was a plexiglass "pocket" with holes, for marking diskettes for punching 
the extra holes.
The "deluxe" model had a stub spindle on the outside and a ring, for 
putting on hub reinforcers.

The 8" model had provision for marking either the DS hole or the SS hole.
So, I did have a few DS/Flippy 8" disks.

The 5.25" one was, of course, obsolete as soon as DS 5.25" drives became 
popular (PC-DOS 1.10).


I used to have some mimeographed instructions, that were purportedly 
put out unofficially by somebody in IBM, for a patch to PC-DOS 1.00 
for use with DS drives, that trested the second side as if it were ANOTHER 
drive!


--
Grumpy Ol' Fred     		cisin at xenosoft.com
XenoSoft                        http://www.xenosoft.com