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- Path: sparky!uunet!usc!wupost!waikato.ac.nz!comp.vuw.ac.nz!actrix!David.Empson
- Newsgroups: comp.sys.apple2
- Subject: Re: Flopticals...any successful usage out there?
- Message-ID: <1992Sep6.042445.29994@actrix.gen.nz>
- From: David.Empson@bbs.actrix.gen.nz
- Date: Sun, 6 Sep 1992 04:24:45 GMT
- Sender: David.Empson@actrix.gen.nz (David Empson)
- References: <1992Sep3.045719.10600@cco.caltech.edu> <1992Sep5.211140.28318@cs.tulane.edu> <1992Sep5.224214.16452@cco.caltech.edu>
- Organization: Actrix Information Exchange
- Keywords: Floptical, Insite, SCSI
- Lines: 40
-
- In article <1992Sep5.224214.16452@cco.caltech.edu> toddpw@cco.caltech.edu (Todd P. Whitesel) writes:
- > lang@cs.tulane.edu (Raymond Lang) writes:
- >
- > >In article <1992Sep3.045719.10600@cco.caltech.edu> toddpw@cco.caltech.edu (Todd P. Whitesel) writes:
- > >>1. Tulin is final-testing an Apple SCSI driver for the Floptical. This would
- > >>be GS/OS only, and while I remember hearing that the current SCSI.Manger will
- > >>work with the Rev.C card, I am not certain.
- >
- > >So I wouldn't be able to use this from a PC-Transporter, since that runs
- > >under P8; or would I just have to make sure that I launched AEPC from GS/OS?
- >
- > I don't know exactly how the PCT operates -- maybe somebody else can answer
- > this one. The RamFast (rom version 2.01 or later) will use the floptical from
- > both GS/OS and P8; it functions but it is not seamless. I am working on getting
- > CVT to support it but they are not being too cooperative just yet.
-
- The PCT accesses drives on the Apple side of the system as if they were
- PC floppy drives. You can have up to four floppies (A: through D:).
- The disk must be in PC format, i.e. the first block has the MS-DOS
- boot record, including information about the number of sectors, sides
- and cylinders used by the disk.
- The PCT BIOS fakes the appropriate BIOS parameter blocks, so most PC
- software won't care about unusual disk sizes. In most cases, you end
- up with a disk that has a few non-existant sectors, which are marked
- as "bad" in the file allocation table, but don't actually exist.
-
- All these drives are accessed using READ_BLOCK and WRITE_BLOCK calls
- to the MLI. Formatting one of these disks causes the PCT software to
- call the device's ProDOS block driver's FORMAT routine.
-
-
- The only support the PCT has for "hard drives" is a file on a ProDOS
- volume, which contains the image of a PC hard drive, including
- partition table. The PCT uses standard ProDOS MLI calls (OPEN, READ,
- WRITE, SET_MARK, etc.) to access these.
- --
- David Empson
-
- Internet: David.Empson@bbs.actrix.gen.nz EMPSON_D@kosmos.wcc.govt.nz
- Snail mail: P.O. Box 27-103, Wellington, New Zealand
-