Date: Sat, 06 Jan 2001 13:33:04 +0200
From: "Eli Zaretskii" <eliz AT is DOT elta DOT co DOT il>
Sender: halo1 AT zahav DOT net DOT il
To: Martin Str|mberg <ams AT ludd DOT luth DOT se>
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In-reply-to: <200101051844.TAA15180@father.ludd.luth.se> (message from Martin
	Str|mberg on Fri, 5 Jan 2001 19:44:26 +0100 (MET))
Subject: Re: Fw: Patch for statfs.c
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> From: Martin Str|mberg <ams AT ludd DOT luth DOT se>
> Date: Fri, 5 Jan 2001 19:44:26 +0100 (MET)
> 
> In statfs.c there is this text:
>   /* For a CD-ROM drive, Int 21h/AX=3600h gives incorrect info.
>      Use CD-ROM-specific calls if they are available.
> 
>      Int 2Fh/AX=1510h gives us a way of doing IOCTL with the
>      CD-ROM device driver without knowing the name of the
>      device (which is defined by the CONFIG.SYS line that
>      installs the driver and can therefore be arbitrary).  */
> 
> So I ask the list on which platforms does Int 21h/AX=3600h give
> incorrect info?

It gives incorrect values for CDs on _all_ platforms.  It always
returns 128MB, which is wrong for most CDs.

I think we should not use anything but CD-specific calls for CDs.  I
don't know what to do with DVDs.  Does RBIL say something about them?