8 Jan
2007
8 Jan
'07
10:14 p.m.
On Mon, 8 Jan 2007, Chris M wrote:
When it comes to floppy drives, if neither Chuck nor I have EVER SEEN one,
then you are not going to find one available.
Hmmm, I
don't know of a single floppy drive that
responds to the
video interrupt (10H) or Terminate-and-Stay-Resident
(27H).
Hmmm, well let's just say there's still a few things
out there you haven't seen yet LOL LOL. As an aside, what would it take to alter a *much
referably* HD 5.25" drive to work as a GCR drive? I
know I'm oversimplifying the issues, but the basic
difference is that the spindle motor is driven at
different speeds in a gcr unit, while only 1 speed in
a standard drive.
THAT is the LEAST important difference!
You need different "encoding" circuitry for the disk controller.
And this is according to what
cylinder it's reading/writing to. Hmm, what about some
sort of sensor to indicate where the head is, and the
voltage to the motor is bumped up accordingly?
You don't even need to play silly games with motor speed
(especially NOT "bumping up voltage"!)
You can handle the same differences by altering the data transfer rate
(which ALSO will not respond well to "bump up the voltage".)