3.5" MFM hard disk

From: Richard Erlacher <edick_at_idcomm.com>
Date: Sat Jun 2 14:33:52 2001

Probably not.

My experience with the Apple-specific bridge controllers is that they are set up
for a specific drive geometry in their firmware, which is Apple-specific, and
geometries other than that won't work. They don't seem to have the ability to
respond to drives that are set up on an otherwise identical, but non-Apple,
bridge board, that have a different geometry or some other unpalatable
characteristic, e.g. sector size, or some such.


----- Original Message -----
From: "Jeff Hellige" <jhellige_at_earthlink.net>
To: <classiccmp_at_classiccmp.org>
Sent: Saturday, June 02, 2001 12:49 PM
Subject: Re: 3.5" MFM hard disk

> >Ah, I see. It's some whacko custom thingie. Didn't the Lisa originally
> >use some kind of ProFile-ish thing (custom interface, custom drive
> >electronix, etc.).
> I opened up my 5meg Profile hard disk finally and found that
> it has a ST-506 inside of it coupled to a couple of Apple coverter
> cards. Most of the case of those Profiles is taken up by the PSU.
> At least that bodes well for eventually getting it running again if
> the drive itself appears to be fairly normal. Without bothering the
> drive geometry settings, if there are any, wouldn't any MFM drive
> attached to this setup then appear to the system to be the 506?
> Jeff
> --
> Collector of Classic Microcomputers and Video Game Systems:
> Home of the TRS-80 Model 2000 FAQ File
> http://www.geocities.com/siliconvalley/lakes/6757
Received on Sat Jun 02 2001 - 14:33:52 BST

This archive was generated by hypermail 2.3.0 : Fri Oct 10 2014 - 23:33:56 BST