1 Jun
2007
1 Jun
'07
10:01 p.m.
On Wed, 30 May 2007, Tony Duell wrote:
Yes, that would be the ProFile hard disk unit. You swap in a "piggyback"
Z8 MPU with special EPROM for the masked-ROM version and have at it with a
special tool suite on the Apple ///. I have resurrected several dead
units by using the HDA assembly from a vanilla Seagate ST-506 (I think
that's the one - from memory) with the proprietary Apple electronics.
Unfortunately, the collection of software I was able to get my hands on
was missing the 10MB format utility so I've never been able to get a 10M
ProFile fixed.
If anyone has a line on this, please contact me privately? Ditto if you
need the hex image or the diagnostic software.
Steve
--
Wasn't
there a similar issue with the hard drive low-level formatter, in that
it was never released by Apple - so you couldn't take a Lisa ProFile and
format it for a ///, and nor could you do drive replacement in the field -
instead the whole faulty unit presumably got sent back to Apple for repair.
Wasn't there one drive -- and I think it was an Apple -- where you had to
temprorially replace a microcontroller chip to be able to do a low-level
format? And of course that specially-programemd microcontrolller was
never avaialble to normal customers.