🚀 go-pugleaf

On 12 Apr 90 17:14:53 GMT, tell@oscar.cs.unc.edu (Stephen Tell) said:

Stephen> From looking at the hardware and a discussion here long ago,
Stephen> I believe its like this:

Stephen> The bare drive has a signal that says whether or not a disk
Stephen> is in the drive.  This signal goes to the little interface
Stephen> board between the drive and the DB-23 connector (The
Stephen> interface is on the motherboard for internal drives, but a
Stephen> seperate board on the 1010.)  Whenever this signal goes to
Stephen> "disk removed," even for an instant, it sets a latch on the
Stephen> board.

Stephen> Every so often, the system comes along and polls this latch.
Stephen> Then, it steps the drive, which clears the latch.  If there's
Stephen> no disk in the drive, the latch immediately gets set again.

Okay, this makes sense.  It would have been nice had they found a
somewhat less obstrusive way to do it, or maybe they should have had
the ROMs always try to step past track 0 instead of alternating --
it's officially a requirement for a proper Amiga drive that such not
cause actual head motion, right?  If it would always make a lot of
noise on an Amiga, rather than the current clicking, you can bet few
such Amiga drives would be sold...

Deven
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