Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!wuarchive!gem.mps.ohio-state.edu!apple!dlyons
From: dlyons@Apple.COM (David Lyons)
Newsgroups: comp.sys.apple
Subject: Re: CD ROM formats (was Re: Questions....)
Message-ID: <35981@apple.Apple.COM>
Date: 27 Oct 89 17:49:13 GMT
References: <8910260356.aa01009@SMOKE.BRL.MIL> <4912@internal.Apple.COM> <3483@puff.cs.wisc.edu>
Organization: Apple Computer Inc, Cupertino, CA
Lines: 30

In article <3483@puff.cs.wisc.edu> blochowi@rt5.cs.wisc.edu (Jason Blochowiak) writes:
>[...] Is there are reason that a ProDOS CD-ROM wouldn't be readable under
>GS/OS (or ProDOS 8, for that matter)? [...]

ProDOS partitions on CD-ROM disks are perfectly readable by the ProDOS FST;
no problem.

>What are the other major formats for CD-ROMs, and how many of them
>are in HS/ISO 9660? (rough percentages should do the trick) I would imagine
>that Apple picked High Sierra for a reason, but the reason isn't always
>because it's the most popular... Oh, if the CD-ROMs aren't in HS, will they
>still be block-level readable with the Apple CD-ROM drive?

I don't have any statistics for you, but High Sierra / ISO 9660 are very
similar standards designed specifically for CDs.  If a CD isn't in one
of those formats, it's in some particular system's "preferred" file system
format (like HFS for lots of CDs that ship with Macintosh software).

I *think* all CDs containing data are readable at the block level under
GS/OS (using DRead, *not* READ_BLOCK), or using extended SmartPort calls
under ProDOS 8 (not GS/OS).
-- 

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