Messages in this thread | | | Date | Mon, 21 Feb 2000 12:01:15 +0100 | From | David Balazic <> | Subject | Re: Of removable devices |
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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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