🚀 go-pugleaf

In article <1993Jan8.225002.4186@aw2.fsl.ca.boeing.com> ckr2196@aw2.fsl.ca.boeing.com (Caryn K. Roberts) writes:
>From article <817@ulogic.UUCP>, by hartman@ulogic.UUCP (Richard M. Hartman):
>> PC disks are formatted in concentric circles.  Mac disks are
>> formatted in a spiral (like your old black vinyl records).  (This
>> is what let Macs put 800k on a floppy that the PC could only get 
>> 720k on.)  The Mac drive (actually the superdrive) can be controlled 
>> to read concentric-formatted disks.  I do not believe that there is
>> a way to control the standard pc drives to read spiral-formatted
>> disks.  There may be special hardware out there that can do it.

>GIGO.

Wasn't he a french singer?

>Mac disks are formatted just like MS-DOS disks except that density varies
>per track on Mac disks. In early Macs the disk speed was varied, but 800k
>and 1.44m discs accomplish this by varing the data read/write stream.

Oh well, I got the details wrong.  The concept -- that mac disks
used special formatting that standard ms-dos machines would be unlikely
to be able to read remains.  Although apparently the more recent macs
have abandond the variable-speed drive concept and use more standard
formatting (from what I gather on the parallel leaf from my msg).

Would it be possible to, on a track-by-track basis, change the
# sectors per track on an ms-dos floppy drive?

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