Message-Id:	<199602221536.KAA15913@mail-e2a-service.gnn.com>
Mime-Version:	1.0
Date:	Thu, 22 Feb 1996 10:41:07
From:	Jethro DOT Wright AT mail-e2a-service DOT gnn DOT com, III <Jetman AT gnn DOT com>
To:	djgpp AT delorie DOT com
Subject:	Fwd: Re: _bios_disk using C to read a logical drive's sectors

>>Using the DEBUG command, I can see sector 0 on each logical drive 
>>(altough I have not yet tried that with the CD-ROM drive).
>
>Forget the CD.  It's a network device, not a block device.
>

	It may not be possible to do sector I/O on a CD-ROM,
depending on the support for raw I/O via CD-ROM's driver.
In either instance, driver is technically a character-device
and is accessed via Int 0x2f.  The specs for MSCDEX 2.2x are
readily available on the net.  Be warned, I learned about this
in part when I wrote a CD audio player and found my CD-ROM driver
(Sony CDU-33A) doesn't support raw I/O....


===============================================================
All wars all civil wars.  Some just happen to remain within the
boundaries of the abstraction known as a "country".
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