3 Nov
2022
3 Nov
'22
3:17 p.m.
Fred,
The Victor/Sirius 9000 was sort of PC compatible and featured a varial
speed floppy format, no?
Sellam
On Thu, Nov 3, 2022 at 3:09 PM Fred Cisin via cctalk <cctalk(a)classiccmp.org>
wrote:
> Note that
some disk types are CLV, not CAV (e.g. some Mac disks), and
> reading them without additional hardware support may be problematic.
On Thu, 3 Nov 2022, Grant Taylor via cctalk wrote:
Is Constant Linear vs Angular Velocity (?)
anything I need to worry
about
when sticking within the IBM PC compatible line
from say '90 forward?
NO.
PC [compatible] was fixed rotational speed of 300 or 360 RPM.
Well, Weltec? made a 180 RPM drive, to be able to use 1.2M on 5150/5160,
and there are many other bizarre oddities.
CLV, or "zone" recording, with vaarying motor speed CAN be worked around
with a constant motor speed, by varying the data transfer rate, . . .
but NO PC [compatible] machines used variable speed floppies, other than
300RPM and 360RPM.