11 Oct
1998
11 Oct
'98
2:34 p.m.
Um, I don't care what anybody says, but that disk drive does NOT look like
anything similar to an Apple Disk II.
BTW: I used to have a Disk II, and the heads were positioned by a stepper
motor, and didn't have any "spiral-grooved disc" anywhere in the entire
unit.
--
-Jason
(roblwill(a)usaor.net)
ICQ#-1730318
----------
----------------------------------------------------------------------------
From: Kai Kaltenbach <kaikal(a)MICROSOFT.com>
To: Discussion re-collecting of classic computers
<classiccmp(a)u.washington.edu>
Subject: Picture up (RE: Microsci HAVAC)
Date: Sunday, October 11, 1998 10:34 PM
OK, I snapped a quick shot of the HAVAC, it's not the greatest picture
but
it'll do :)
http://www.geocities.com/~compcloset/MicrosciHavac.htm
Kai
-----Original Message-----
From: Sam Ismail [mailto:dastar@ncal.verio.com]
Sent: Sunday, October 11, 1998 6:42 PM
To: Discussion re-collecting of classic computers
Subject: Re: Microsci HAVAC
On Sun, 11 Oct 1998, Kai Kaltenbach wrote:
anyone
This weekend I picked up this wacky little 6502
computer called the
Microsci
> HAVAC. Has anyone else ever seen one of these, or better yet, does have a boot
disk for it?
Sounds neat. Can you supply us with a GIF?
The HAVAC has the weirdest floppy drive I've
ever seen. It has a
center-mounted clamp lever, and the head positioning is done via a
spiral-grooved disc!
The Apple Disk ][ used the same mechanism.
Sellam Alternate e-mail:
dastar(a)siconic.com
---
Ever onward.
Coming in 1999: Vintage Computer Festival 3.0
See http://www.vintage.org/vcf for details!
[Last web site update: 09/21/98]
12 Oct
12 Oct
8 a.m.
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10:52 a.m.
On Mon, 12 Oct 1998, Tony Duell wrote:
Odd... I've got a number of Disk II's here,
and every one has a stepper
motor under the chassis with a disk on the spindle of it above the
chassis. There's a spiral groove in the disk and a little lug on the head
assembly that fits into the groove. The stepper motor turns the disk and
thus moves the heads.
Maybe there are several versions of the Disk II
There is only one Disk ][. As mentioned before, the newer units were
first called the Unidisk and then later simply 'Apple 5.25" Drive'.
Sellam Alternate e-mail: dastar(a)siconic.com
-------------------------------------------------------------------------------
Ever onward.
Coming in 1999: Vintage Computer Festival 3.0
See http://www.vintage.org/vcf for details!
[Last web site update: 09/21/98]
8:03 a.m.
On Sun, 11 Oct 1998, Jason Willgruber wrote:
Um, I don't care what anybody says, but that disk
drive does NOT look like
anything similar to an Apple Disk II.
You might want to go back and reread the earlier parts of the thread. I
don't recall anyone saying that the HAVAC drive "looked like" the Apple
drives, only that the 'spiral grooved disc' was common to early shugart
drive mechanisms such as were used in the Apple Disk II drives.
BTW: I used to have a Disk II, and the heads were
positioned by a stepper
motor, and didn't have any "spiral-grooved disc" anywhere in the entire
unit.
Better look again. The motor used for the head actuator was indeed a
stepper motor, but mounted on its shaft is the (now) infamous
spiral-grooved disc which provided the coupling between the motor and the
head carriage.
(at least on the dozen or so Disk II units in my collection...) B^}
-jim
---
jimw(a)agora.rdrop.com
The Computer Garage - http://www.rdrop.com/~jimw
Computer Garage Fax - (503) 646-0174
9:20 a.m.
On Sun, 11 Oct 1998, Jason Willgruber wrote:
Um, I don't care what anybody says, but that disk
drive does NOT look
like anything similar to an Apple Disk II. BTW: I used to have a Disk
II, and the heads were positioned by a stepper motor, and didn't have
any "spiral-grooved disc" anywhere in the entire unit. --
You had a Unidisk.
Sellam Alternate e-mail: dastar(a)siconic.com
-------------------------------------------------------------------------------
Ever onward.
Coming in 1999: Vintage Computer Festival 3.0
See http://www.vintage.org/vcf for details!
[Last web site update: 09/21/98]
9573
days inactive
9574
days old
4 comments
4 participants
participants (4)
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ard＠p850ug1.demon.co.uk -
dastar＠ncal.verio.com -
jimw＠agora.rdrop.com -
roblwill＠usaor.net