Hi Tony,
No, the widget is the hard drive in the Lisa 2/10. You are thinking of the
twiggy drives in the original Lisa 1.
I only had the "working" IWD chip in for a moment, just to see if the system
would pass it's internal checks hence prove mine was faulty. I didn't pay
too much attention to the widget error itself (error 75 from memory..which
means the machine thinks the system files are corrupt). Once I get my own
IWD I'll resume the diagnostic process.
The widget spins up and I can hear the "clunk" which releases the brake (a
good sign).
The floppy drive on the Lisa 2/10 couldn't boot my Lisa boot disk so that
needs some attention also.
Yes, I think you are right. From my reading it seems the IWD chip was used
in the early Macs and the Apple IIGS. The part shouldn't be that uncommon
then.
Terry
----- Original Message -----
From: "Tony Duell" <ard at p850ug1.demon.co.uk>
To: <cctalk at classiccmp.org>
Sent: Friday, January 28, 2011 9:40 AM
Subject: Re: Apple Lisa 2/10 - Progress
However, the
widget drive itself throws up an error. First things first
though. I'll source a replacement IWM chip first, then worry about the
widget drive. It might just need some exercise.
Is this the same IWM that was used in the earlier Macs? That might be a
source of one.
As for the drive, this is the strange 5.25" drive, isn't it? I would love
to see insdie one. Hwoever, my first comment is going to be that I
suspect an alignment disk for that is even harder to find than alignment
disks for standard drives, so whatrver you do, don't disturb the head
alignment!
I don't think there are schematics of the Widget out there, so you may be
somwhat on your own. A drive typically consists of several subsystems --
the spindle motore, the haed positoner (and track 0 sensor), the index
sensor, write protect sensor, etcm and the read/write chain. Apple may
well have oden without some of the sensors, though.
Does the eror you get give any more information? Does thre drive try to
spin? Does it move the heads?
-tony