Re: SCSI Interface for A2GS

["william strutts" <wrstrutts1@home.com>]

Is there any problems associated with reading CD-R's?  I
know a lot of older CD players won't play CD-R's that I
have and cheaper DVD players won't play CD-R disc
either.

--
--
William R. Strutts - wrstrutts1@home.com - Whatever!

C'est moi!  http://www.facelink.com/wrstrutts

Just hacking away...
"David Empson" <dempson@actrix.gen.nz> wrote in message
1evogp7.35bn1h9dbleN%dempson@actrix.gen.nz">news:1evogp7.35bn1h9dbleN%dempson@actrix.gen.nz...
> Geoff Pool <gepool@netway.com> wrote:
>
> > I have a RamFast 3.01E and an Apple Hi Speed SCSI controller.  My
questions
> > are:
> >
> > 1.  Is it possible to use an off the shelf SCSI CDROM drive to read
ISO9660
> > CDROMs using the RamFast and have a SCSI drive attached (mine is a
Quantum
> > LPS SCSI 1 drive) with ProDos paritions.  I know the Apple Hi Speed
requires
> > special, older types of CDROMS.
>
> The Apple High-Speed SCSI card should work fine for accessing data CDs
> with almost any modern CD-ROM drive, and with a large number of older
> drives (as long as they comply with the standard command set).  Some
> very early non-Apple CD-ROM drives won't work, because they used a
> proprietary command set.
>
> The specific problem with the Apple High-Speed SCSI card (and the
> original Apple card) is audio CDs.  The SCSI card firmware and various
> drivers only support Apple's proprietary audio CD command set, which
> restricts you to three models of CD-ROM drive from Apple (the CD-SC,
> CD-SC Plus and CD-150) if you want to play audio CDs under computer
> control.  Apple switched to the SCSI-2 standard CD-ROM drive command set
> from the CD-300 (2x external drive), and the Apple II SCSI card firmware
> and GS/OS drivers were never updated to match this change.
>
> The RamFast is generally a better solution for using a CD-ROM drive, as
> it supports a wider range of drives for audio control.
>
> You may run into compatibility problems with recent hard drives,
> however.  Quantum Fireball models starting at about 500 MB don't work
> with a RamFast, but do with an Apple SCSI card.  This may affect drives
> from other manufacturers as well.
>
> The cause: the RamFast doesn't implement the SCSI Arbitration protocol,
> and doesn't have its own SCSI ID.  Some modern hard drives require these
> features to be implemented by the host (and they are for the Apple
> cards).
>
> I don't know whether any recent CD-ROM drives are this fussy.