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- From: alla0008@student.tc.umn.edu (Graham Allan)
- Subject: Re: Reading Mac disks (low density)
- Message-ID: <1992Nov21.181032.13353@news2.cis.umn.edu>
- Sender: news@news2.cis.umn.edu (Usenet News Administration)
- Nntp-Posting-Host: student.tc.umn.edu
- Organization: University of Minnesota
- References: <1eiviiINNd7g@iraul1.ira.uka.de> <5633@krafla.rhi.hi.is>
- Date: Sat, 21 Nov 1992 18:10:32 GMT
- Lines: 33
-
- In article <5633@krafla.rhi.hi.is> adamd@rhi.hi.is (Adam David) writes:
- >In <1eiviiINNd7g@iraul1.ira.uka.de> S_TILLENBURG@iravcl.ira.uka.de (|S| Stephan Tillenburg) writes:
- >
- >>The Mac emulator SPECTRE GCR on the ATARI ST is a piece of hardware fitted to
- >>the ROM PORT. If you want to read Mac disks, you have to fit a cable from the
- >>SPECTRE - Hardware to the Floppy-Out ( no bug, OUT believe it or not ) of the
- >>ST. As the speed of rotation in of the drive is fixed in the ST, the transfer
- >>rate to the floppy is modified, the GCR - coding may be done by hardware or
- >>software, don't know.
- >
- >I think the GCR coding is done in software, the transfer rate is hardware
- >generated under software control. If someone can come up with the ARM code
- >to drive one of these beasts, the hardware connections are trivial by
- >comparison. But quite honestly, it would only be worth the trouble if a
- >Mac emulator existed for the Arch. Whether the 680x0 would be done in
- >software or hardware remains to be seen. Software emulation would be less
- >of a pain on the newer ARM chips which have configurable byte order.
- >Since it is such an easy thing to do, I am rather surprised that no-one
- >has made a Mac-on-a-card to fit inside an Acorn machine. The basic model
- >would be a 68000 CPU with ROM sockets and some RAM, and would rely on the
- >Acorn machine for all I/O. This ought to be just as easy to do as a PC
- >card, there is even a set of Macintosh compatible ROMs out there that
- >can be licensed without running into legal hassles with Apple.
-
- There have been rumours for years of a Mac emulator (in software) "within
- Acorn". Whether anyone really believes it or not is another matter! It's
- certainly an intriguing idea. There certainly are *some* pieces of Mac
- software which it would be useful to have access to from time to time.
- Though most of them (eg Mathematica) would be 99% useless on a software
- emulator! What I would give for a Mathematica port... dream on!
-
- Graham allan@mnhep8.hep.umn.edu
-
-