Thread View: comp.os.msdos.misc
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Started by Bin Lin
Tue, 05 Jan 1993 18:05
How to read MAC disks on PC?
Author: Bin Lin
Date: Tue, 05 Jan 1993 18:05
Date: Tue, 05 Jan 1993 18:05
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Does anyone out there know how to read a MAC disk on a PC? I know MAC can read/convert PC disk/file with Apple File Exchage. But it's done on MAC. I would really like this to be done on a PC, even I have to pay for the software and hardware. Please help! Thanks in advance! Bin. PS: Sorry if this is in FQA. I have seen this question be asked couple of times. But I didn't read them. -- Bin Lin Department of Mathematics and Computer Science Drexel University Philadelphia, PA 19104
Re: How to read MAC disks on PC?
Author: Richard M. Hartman
Date: Wed, 06 Jan 1993 21:44
Date: Wed, 06 Jan 1993 21:44
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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. Good luck. -Richard Hartman hartman@ulogic.COM =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= "If we do not succeed, we risk failure." -D. Quayle
Re: How to read MAC disks on PC?
Author: Larry Jones
Date: Fri, 08 Jan 1993 22:07
Date: Fri, 08 Jan 1993 22:07
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In article <817@ulogic.UUCP>, hartman@ulogic.UUCP (Richard M. Hartman) writes: > 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.) No, Mac disks are formatted in concentric circles, too. The difference is that the Mac drive changes the speed that the disk rotates as the head moves in and out, thus keeping the speed that the media moves past the head approximately constant. This means that you can record more sectors on the longer outer tracks than on the shorter inner tracks and that's where the extra capacity comes from. ---- Larry Jones, SDRC, 2000 Eastman Dr., Milford, OH 45150-2789 513-576-2070 larry.jones@sdrc.com or ...uunet!sdrc!larry.jones Don't you hate it when your boogers freeze? -- Calvin
Re: How to read MAC disks on PC?
Author: Anthony Naggs
Date: Sat, 09 Jan 1993 01:51
Date: Sat, 09 Jan 1993 01:51
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In article <322@heimdall.sdrc.com> scjones@thor.sdrc.com (Larry Jones) writes: >No, Mac disks are formatted in concentric circles, too. The difference >is that the Mac drive changes the speed that the disk rotates as the >head moves in and out, ... Agreed. :-) Recent Macs use HD drives (for 1.44Mb disks), for the last 3 or 4 years - they run at a constant speed, with extra electronics changing the data rate to provide compatibility with old 400k & 800k disks. These Macs can read & write 720k & 1.44Mb DOS disks, using some transfer software provided. A couple of commercial PC programs are available that will read HD Mac disks in a 1.44Mb (presumably also the rare 2.88Mb) drives on PCs. Hope this helps, Anthony Naggs (Software/Electonics Engineer)
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