What little I could see in the picture looked sort of
like a
Sony drive mechanism with the square eject button. True?
I would have to open the device up to check on that... and they
packed stuff in there pretty tightly. The last time I tried to
open it up, I had to stop as I hadn't located all the release
points for the boards. I'll have to try again...
Early Sony 3.5" diskettes and drives had a manual
diskette shutter.
You had to slide the shutter to the open position, and it would lock
open. Then you could insert the diskette. When you ejected the
diskette, you were expected to pinch it (that little arrow in the
upper left corner used to point to the word "PINCH") to release the
shutter; a spring would pull it closed.
Interesting... I know that I was entirely unable to insert a
standard 3.5" floppy... I had to remove the sliding window,
adn even then it didn't feel like it was inserting correctly...
Fred Cisin probably knows more about this than I do, I
just remember
seeing some of the early HP stiffies that were usable this way so that
they would work in older stiffy drives. They weren't hard to find in
1984 or so, though then-current drives were "automatic".
If I can take it apart and get a picture, maybe you or he could
truly identify it...
Megan Gentry
Former RT-11 Developer
+--------------------------------+-------------------------------------+
| Megan Gentry, EMT/B, PP-ASEL | Internet (work):
gentry!zk3.dec.com |
| Unix Support Engineering Group | (home):
mbg!world.std.com |
| Compaq Computer Corporation | addresses need '@' in place of '!' |
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http://world.std.com/~mbg/ |
| Nashua, NH 03062 | "pdp-11 programmer - some assembler |
| (603) 884 1055 | required." - mbg KB1FCA |
+--------------------------------+-------------------------------------+