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- Ernst,
-
- >>>>>> "Jesse" == g sightler <g.sightler@genie.geis.com> writes:
- >>
- >> Jesse> Actually, it would be possible to do this without the MAC
- >> Jesse> floppy drive, if someone was willing to put the many hours
- >> Jesse> necessary into it. <g> Seriously, it is VERY timing
- >> Jesse> sensitive (which rules out the possibility of running it
- >> Jesse> under any mulitasking OS), but it can be done with the
- >> Jesse> right amound of hacking/patience.
- >>
- >> Jesse> In fact, the early MAC emulators for the Amiga did this
- >> Jesse> rather well (of course, they had to shut off multitasking
- >> Jesse> to do it :).
- >>
- >> Clifford T. Matthews replied:
- >>
- >>Well it certainly won't happen between now and when 2.0 comes out.
- >>Even then I'm not sure that the PC has the same sort of control over
- >>the floppy disk that the Amigas did. After 2.0 comes out we'd
- >>probably be willing to pay some $$ to get this functionality, but I'd
- >>also guess that just a simple program to read 800k Mac disks on a PC
- >>would also generate some revenue, which then begs the question "if
- >>it's doable, why hasn't someone done it?" Specifically, why hasn't
- >>someone written a program for the PC which reads an 800k formatted
- >>floppy (writing is much less important).
- >>
- >Had the same thoughts and had someone look into the SWIM chip of Mac's
- >(Super Woz Integrated Machine) - handles diskette I/O. It is IMPOSSIBLE to
- >do this on a PC without hardware. The 800K Mac drives (and all drives
- >since then) use a variable spindle speed of the disk drive's motor. This
- >motor on PC drives can only be switched on or off. There is no software
- >control over its speed. When the speed cannot be controlled there is no
- >way to decipher the information that comes from the controller.
-
- Actually, the Amiga was unable to change the speed of the drive's motor
- either. This is why it was such a TIMING sensitive thing (and a very
- difficult hack to program, from what I've been told :).
-
- Although, as we have now been told by others here, it still wouldn't be
- possible on a PC (they don't give as much control over the floppy as the
- Amiga).
-
- ||||| Jesse D. Sightler |||||
-
-