Subj : Re: how to detect cdrom?
To   : Brian.Iglesias@xspamp0.f321.n751.z6
From : Steve
Date : Fri Feb 08 2002 01:15 am

From: Steve@f3.n342.z1.cereal.mv.com (Steve)
Subject: Re: how to detect cdrom?

From: "E. S. (Steve) Fabian" <ESFabian@BellAtlantic.net>

Brian.Iglesias@xspamp0.f321.n751.z6.fidonet.org wrote:
>
> hello everyone.
>
> i am looking for a generic batch routine that will detect the cdrom
> and ramdrive. this is for a pcdos 2000 bootdisk. previously,
> i was using msdos 6.22 with 'findramd.exe' (with setramd.bat)
> from the win98se ebd, but when i moved it to pcdos it didn't work.
>
> i traced it and 'xmsdsk.exe' loads fine, but 'findramd.exe' does not
> return the errorlevel like before. i have the feeling it doesn't like
> non-MS dos'es.
>
> can this be done without using external utilities?

You can detect a CDROM using %@CDROM[x:] Locating a virtual [ram] disk is not
trivial. I use %@label[x:] and compare the resulting string with the known
labels my virtual disk drivers create - Microsoft's RAMDISK.SYS creates the
label "MS-RAMDRIVE". Unfortunately, there is no way to prevent one from using
that label on a hard disk. You can detect a removable drive with - of all
things - %@removable[x:].

Type HELP FUNCTION at the 4DOS prompt and look at the "drioves and devices"
section.
--
E. S. "Steve" Fabian               ESFabian@BellAtlantic.net
POB 1540, Cherry Hill, NJ 08034    Telephone: 856-354-1752
EMPIRE Consultants, Inc.           Director, Software Development
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