Re: audio discs on generic CD-ROM drive?

[dempson@swell.actrix.gen.nz (David Empson)]

In article <1993Mar30.011139.22261@zip.eecs.umich.edu> grover@emunix.emich.edu (Grover Thomas) writes:
> In article <1993Mar29.115055.15319@actrix.gen.nz> dempson@swell.actrix.gen.nz (David Empson) writes:
> >
> >Well, CD Remote sends vendor-specific commands for the Apple CD-ROM
> >drive, so unless Toshiba used exactly the same set of commands as
> >Apple, CD Remote will not work.
> 
> Hmmm, thanks for the info.
> 
> Since audio discs work under software for a '486 (and Toshiba drivers),
> would it be possible to edit the commands in the CD-Remote NDA into
> Toshiba commands?

I don't know.  I suspect that CD Remote makes device-specific calls to
the CD-ROM SCSI driver.  I haven't looked into accessing the CD-ROM
drive from GS/OS yet, so I'm not sure what facilities are provided by
the CD-ROM driver.  At the very least, it allows the application to
perform arbitrary SCSI calls, but it may also provide standard calls
for the CD-ROM AudioPlay, AudioStop, etc. commands.

The problem with the Toshiba drive is that the Apple CD-ROM SCSI
driver won't recognise it.  You would need a "Toshiba CD-ROM driver"
as a first step.

You would probably also need to disassemble CD-ROM in order to change
the commands it is sending.

> [Of course, this would require knowing what the respective Apple and
> Toshiba commands actually are, and where they occur in the NDA.]

The Apple CD-ROM drive command set is documented in the "Apple CDSC
Developers Guide", which is available from APDA (I have a copy).  I
don't know about the Toshiba drive, but it might support the SCSI-2
CD-ROM drive command set (if there is such a thing).
-- 
David Empson                                                               
dempson@swell.actrix.gen.nz    <--- Note my new E-Mail address!