Path: utzoo!attcan!uunet!ncrlnk!ncr-sd!hp-sdd!hplabs!hp-pcd!hpcvlx!craig
From: craig@hpcvlx.HP.COM (Craig Durland)
Newsgroups: comp.binaries.ibm.pc.d
Subject: Re: Other binaries versions of ME wanted
Message-ID: <102760003@hpcvlx.HP.COM>
Date: 23 Dec 88 14:59:38 GMT
References: <260@laas.laas.fr>
Organization: Hewlett-Packard Co., Corvallis, OR, USA
Lines: 17

> Is source available that determines when an EGA card is in 43 line mode?
> I would like a code fragment if anyone knows how to do this.

If the machine has a PC compatible BIOS then:
  40:4A has number of columns (usually 80).
  You can detect EGA or VGA with:
	mov AX,1200H
	mov BX,10H
	mov CX,-1
	int 10H
	cmp CX,-1
	jE notEGA	; if CX didn't change it ain't EGA

  If it is EGA or VGA then 40:84 has number of rows-1.  Otherwise assume
  24 (a 25 line screen).

Craig Durland