RE: CBM Drive Mechanisms

From: Ethan Dicks (
Date: 1999-08-10 14:17:53

--- Marko_Mäkelä <> wrote:
> On Mon, 9 Aug 1999, Ethan Dicks wrote:
> > One thing I wanted to do was to disassemble the "DOS" ROM on the D9060
> > board and locate the drive geometry table.  It should then be possible to 
> > stick in values suitable for other brands of drives, say, for an ST-225.
> Don't the D9060 and the D9090 use the predecessor of SCSI called SASI?


> If yes, wouldn't you need some sort of an SASI to Shugart adapter for the
> Seagate drive?

It's already in there.  The drive mechanism has an ST-506 interface,
attached to a (Xebec?) SASI<->ST-506 converter.

> > I have *lots* of MFM drives, but not many Tandon <10Mb ones.
> Do any of the drives happen to be in the VAX format?  I need a new disk
> for my MicroVAX II. :-)

Some are.  I have a small pile of unformatted RD53-compatible mechanisms
that I pulled from junk PC's over the past couple of years.  It takes a couple
of hours with DEC's diagnostic formatted to prep them, so I haven't bothered.


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