Xref: utzoo alt.msdos.programmer:2045 comp.os.msdos.programmer:511 comp.sys.ibm.pc.misc:820
Path: utzoo!utgpu!news-server.csri.toronto.edu!mailrus!uwm.edu!zaphod.mps.ohio-state.edu!usc!apple!portal!cup.portal.com!leather-bear
From: leather-bear@cup.portal.com (Jeff A Anderson)
Newsgroups: alt.msdos.programmer,comp.os.msdos.programmer,comp.sys.ibm.pc.misc
Subject: Re: Detecting display type (in assembler)
Message-ID: <32858@cup.portal.com>
Date: 16 Aug 90 02:04:56 GMT
References: <90224.150329NEASE@MAINE.BITNET>
Organization: The Portal System (TM)
Lines: 2

If you want to discover what the display mode is, check memory location
0040h:0049h.  It is a byte that defines the current display mode.