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- From: hartman@ulogic.UUCP (Richard M. Hartman)
- Newsgroups: comp.os.msdos.misc
- Subject: Re: How to read MAC disks on PC?
- Message-ID: <833@ulogic.UUCP>
- Date: 10 Jan 93 22:39:06 GMT
- References: <817@ulogic.UUCP> <1993Jan8.225002.4186@aw2.fsl.ca.boeing.com>
- Organization: negligable
- Lines: 32
-
- 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?
-
- =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
- Between the silence of the mountains |
- and the crashing of the sea | -Richard Hartman
- there lies a land I once lived in | hartman@uLogic.COM
- and she's waiting there for me. |
-