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From: Ralf.Brown@B.GP.CS.CMU.EDU
Newsgroups: comp.sys.ibm.pc
Subject: Re: help needed with device driver chai
Message-ID: <22bba045@ralf>
Date: 19 Jun 88 11:06:45 GMT
Sender: netnews@pt.cs.cmu.edu
Lines: 16
In-Reply-To: <5717@columbia.edu>

In article <5717@columbia.edu>, aronoff@garfield (Avram Aronoff) writes:
}The following information is from _MS-DOS Papers_ by The Waite Group.
}DOS has an undocumented system call, 52H, which returns a pointer to the
}"list-of-lists," an array of far pointers to assorted structures. Do
}                mov     ah,52h
}                int     21h
}A far pointer is returned in es:bx. The information contained there is:
[...]

Please note that the given structure is only valid in DOS 3.x.  Under DOS 2.x,
the NUL device driver is at offset 17h from ES:BX, not offset 22h.
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