Reading TRS-80 discs (was RE: Archiving old discs...)

From: <(>
Date: Wed Sep 15 16:07:57 1999

> Sure. I was thinking of cards like the original IBM one where the data
> separator was a pile of chips. You can kludge a 9216 in place of them and
> wire up the mode select pins on the 9216 to read FM disks.

I happen to have an IBM floppy card and the circuit used is easily
"adjusted" for other data rates. For 8" replace the 8mhz crystal with
a 16mhz one. for single density you need to scale wrclock and the clock
to the data seperator. Pretty straightforward if you have some of the old
765 application notes.

Also write precomp is there it's a clock scaling problem.

Received on Wed Sep 15 1999 - 16:07:57 BST

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