7 Dec
2010
7 Dec
'10
10:49 p.m.
Well, goodness. Tony, good call..
Actually not that silly. I AM using a HD disk as a
dummy disk just to see
if it rotates and is spat out. I hadn't considered the sensor lining up
with the HD hole. I actually don't have any Lisa disks at the moment
(someone is sending me a MacWorks one). You make a good point. I'm sure
I
have got some DD disks tucked away somewhere so I'll try those before
doing
anything else. If it's as simple as this, I'll be over the moon. The
previous owner said the drives didn't work though and (unlike me) he was a
Mac man (hence should know these things, right? :-) ).
I tried a blank DD 3.5 disk in the slot and volia! The disk spins, then
spits out with an expected error 23 (unreadable disk error code). Although
I won't know for sure until I get the Macworks disk (who knows if all the
keys on the keyboard work), my Lisa 2 seems to be a going concern!
Earlier today I had scoured the web for any mention of a sensor in these
early 3.5 inch drives which might prevented them working at all with HD
disks and found nothing. Nothing in the Lisa forums either although this is
less surprising as many people with Lisas also have software on the right
type of disks. So tonight I really didn't expect to get a positive result.
I'm a happy camper now!
Many thanks for your time and input.
It's now onto the next project, which is a faulty I/O board in a Lisa 2/10.
I want to get that widget drive booting so I can experience the real Lisa
office suite!
Cheers
Terry Stewart (Tezza)
----- Original Message -----
From: "Terry Stewart" <terry at webweavers.co.nz>
To: "General Discussion: On-Topic and Off-Topic Posts"
<cctalk at classiccmp.org>
Sent: Wednesday, December 08, 2010 10:19 AM
Subject: Re: apple Lisa2. Any advice on non-working floppy drives?
> Much obliged for the comments.
>
> Actually I do have a logic analyser and a (borrowed) scope, so I can see
> if
> there is a pulse or a waveform. Making sense of the latter is another
> matter entirely of course. (-:
>
>> I assume you've checked the obvious -- that the spindle motor will turn
>> freely by hand.
>
> Yep!
>
>> How do these things detelct that a disk is inserted? ....
>
> Not sure Tony. I'm fair more familar with 5.25 inch drives. I'll do some
> reading...
>
>> This is a really silly comment, but I'll make it anyway. You are using DD
>> (and not HD) disks, right? The point is that in some drives (certainly
>> some erly Sony full-height osnes), the disk-insered sensor lines up with
>> the HD-detect hole in the latter disk tpye, so if you load such a disk
>> the drive doesn't notice it.
>
Actually not that silly. I AM using a HD disk as a
dummy disk just to see
if it rotates and is spat out. I hadn't considered the sensor lining up
with the HD hole. I actually don't have any Lisa disks at the moment
(someone is sending me a MacWorks one). You make a good point. I'm sure
I
have got some DD disks tucked away somewhere so I'll try those before
doing
anything else. If it's as simple as this, I'll be over the moon. The
previous owner said the drives didn't work though and (unlike me) he was a
Mac man (hence should know these things, right? :-) ).
>
>> Be careful. I don't know if that manual covers the Liaslite/Sony drive
>> system or just the origianl Twiggy drives, but I could well believe there
>> are differneces between them.
>
> Noted. From the reading I've done so far, it seems to cover only the
> original Twiggy drives. From what I've read though the Lisa 2 has the
> twiggy interface, and the Lisa Lite board allows the Sony 400k drive to be
> used with it. As you noted, most of the lines seem to go straight
> through.
>
> Terry
>
>
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