On Thu, 30 Oct 2008, Tony Duell wrote:
> The 9133H has a set of 3 jumpers on the controller board labelled 'Ident
Make that _4_ jumpers...
Sea'.
These seem to set the controller for different geometries, but I
have no idea what all 16 possiilites actually are. Anyone?
In such cases I usually throw the firmware image at the IDA disassembler
Well, if you want to give it a go, I can probably find an image of the
9133H firmware EPROM. And I should have the memory/IO map of the unit
somewhere. At least that would tell you which address corresponds to
reading those jumpers. The processor is a 68B09, BTW (most of the smaller
HP disk/tape units used the 6809. I think the 82901 5.25" drive used a
6802 or someing, and the 9145 tape drive has a full-blown 68000 in it).
For example, I have disassembled the firmware of the
HP 7958A and found
out how to low-level format a foreign ESDI disk (the original one had
failed) with different geometry (the geometry is read from the drive since
it is ESDI). In this case HP-UX mediainit in guru mode was my friend.
I hope you've kept a record of this procedure. It's the sort of thing
others may have to do sometime...
-tony