Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!snorkelwacker!bloom-beacon!eru!luth!sunic!mcsun!unido!rwthinf!franke
From: franke@rwthinf.UUCP (Christian Franke)
Newsgroups: comp.sys.ibm.pc
Subject: Re: ATI EGA Wonder BIOS fix (REPOST)
Summary: vgafix.com not ok for EGA Wonder
Keywords: ATI EGA Wonder
Message-ID: <1908@rwthinf.UUCP>
Date: 11 Dec 89 09:50:21 GMT
References: <1798@rwthinf.UUCP> <257f06b8:7308.1comp.ibmpc;1@ddsw1.MCS.COM>
Organization: RBI - RWTH Aachen
Lines: 40

In article <257f06b8:7308.1comp.ibmpc;1@ddsw1.MCS.COM>, andyross@ddsw1.MCS.COM (Andrew Rossmann) writes:
> [...]
>
>   The above program is a TSR that returns the code. This is not really the
> correct way to do things. If your card supports the 1Ah call, you should
> use the following sequence:
> 
> MOV AH,1Ah   ; the command
> MOV AH,1     ; set display combination code
> MOV BH,0     ; inactive display code (leave 0 if only 1 display)
> MOV BL,8     ; active is VGA analog color (7=mono, 4=EGA)
> INT 10h      ; call it up
> 
> [...]
> 
>   Andrew Rossmann
>   andyross@ddsw1.MCS.COM

This is ok for cards supporting the AX=1A01h (set DCC) call.
Unfortunately, the ATI EGA Wonder only supports the AX=1A00h (get DCC) call.
It returns AL=1Ah only on the get DCC call.
So, it seems to be necessary to use such a TSR to fix the problem.

The TSR I've posted is a quick hack designed to fix my specific problems
with WP 5.0 and NCC. 
A real fix should also correct the DCC values returned by the AH=1Bh
(get state info) at offset 25h,26h.

Regards,

	Christian Franke

	Aachen University of Technology
	Lehrstuhl fuer Informatik I
	Ahornstrasse 55
	D-5100 Aachen
	Federal Republic of Germany
	Tel.: 0241 / 80-3586

	UUCP: franke@rwthinf.uucp ({...mcvax}!unido!rwthinf!franke)