Vojtech Pavlik wrote:
>
> On Mon, Feb 21, 2000 at 09:23:59AM +0100, David Balazic wrote:
> >
> >
> > Vojtech Pavlik wrote:
[ snip ]
> > > Yes, but AmigaOS didn't do it on PC hardware. They did use the same
> > > floppies PC does, but a different controller. PC floppy controller
> > > updates the disk change flag only after stepping the head. If you don't
> > > want to step the head constantly (and also spin the motor all the time),
> > > you can't check for floppy insertion/removal easily.
> >
> > You just described how amiga-floppies work !
> > Ten bonus points for you :-)
>
> Well, yes, but on Amiga you can step from track 0 to track 0. Not
> possible on a PC controller.
Hmm, amiga does a normal step , this is the source of that famous
clicking.
Newer floppy units allow a trick , which must be manually activated in
the OS.
That is that you try a step from track 0 to track -1 , but the head is
not
moved , only the disk-change is updated.
david
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This archive was generated by hypermail 2b29 : Wed Feb 23 2000 - 21:00:27 EST