Re: WTD: tandon 603s or 602s

From: Anders Carlsson (
Date: 2006-07-01 22:14:26

Bill Degnan wrote:

> Theoretically you do not have to do anything to the drive if you swap
> a 603s for a 602s.  If you use a 602s, you in effect convert a d9090
> into a d9060, and the capacity is reduced to 5MB.

The ftp index on this page says:

"The jumper J14 on the DOS board is open in the D9060, and closed in
  the D9090 to select a 4-head vs. 6-head drive."

Maybe that's what you are missing if you tried a 4-head ST-225 with a
D9090 drive?

Speaking of which, I see Ethan many years ago went about to disassemble
the ROMs in order to address a disk with different geometry and perhaps
be able to access a larger part (all?) of a ST-225 disk. How did it go?

Anders Carlsson

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