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From: bert@ucla-cs.UUCP
Newsgroups: net.lang.pascal
Subject: Re: Device checking in Turbo
Message-ID: <9488@ucla-cs.ARPA>
Date: Fri, 28-Feb-86 13:42:19 EST
Article-I.D.: ucla-cs.9488
Posted: Fri Feb 28 13:42:19 1986
Date-Received: Sat, 1-Mar-86 23:23:31 EST
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Organization: UCLA Computer Science Department
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> 
>     Can anyone tell me how I can get version 2.0 of Turbo Pascal running under
> MS/PC-DOS to check the status of a device?  I would like to verify that the
> printer is online, and that the drive is ready before doing I/O.  I would also
> like to have the program check to see what drive it is being run from.
>     I have looked thru Borland's reference manual, but if the info is there I'm
> missing it.  Any help would be greatly appreciated.
> 
> Thanks in advance,
>     George
> 

what you should be looking at is an MS-DOS reference manual.  There are
MS-DOS interrupts which return device status information, and you can
perform any interrupt you want by setting up request parameters in a 
Turbo 'regpack' and calling the Turbo routine Intr.  Results are passed
back through the regpack.