WTD: 5.25' DSDD drive & Acorn Master128 keystrip scan/schematic

[lee davison]

>> I'm after a 5.25" 80-track (preferably 40/80 switchable) DSDD drive,

> Never heard of that, and I can't seen any way it could possibly work.

> If you need to be able to write 40-track and 80-track diskettes, you
> need two drives.

It was common practice to use 96 tpi drives for both 40 and 80 track
disks on BBC micro systems. If someone only had a 48 tpi drive and
couldn't read the disk written on the 96 tpi drive the usual solution
was to format it on the 48 tpi drive and then re-write it on the 96
tpi drive.

Cumana dual 40/80 disk units seem to use Mitsubishi M4853 drives.

Lee.









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