On Mon, 12 Oct 1998, Jason Willgruber wrote:
> Mine was more like the mechanism of either a TRS-80 drive, or an IBM Tandon
> drive. The heads were connected to a horizontal stepper by a thin metal
> sheet.
What's called a "split band positioner".
The first drives that Radio Shack retailed for the Model 1 were Shugart
SA400s, with the infamous spiral grooved "phonograph" disk. Then IIRC, they
switched to Tandon TM100-1, and then later TPI?.
IBM started with Tandon TM100-2. IBM's first half height drives (PC JR,
and Potable PC) were Qume-trak 142.
The FIRST drives for the Apple ][ used a Shugart mechanism with the
infamous grooved disk. I have no idea what they might have used later.
--
Fred Cisin cisin_at_xenosoft.com
XenoSoft http://www.xenosoft.com
2210 Sixth St. (510) 644-9366
Berkeley, CA 94710-2219
Received on Mon Oct 12 1998 - 19:37:51 BST