Xref: utzoo comp.sys.att:9527 comp.unix.i386:4871
Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!cs.utexas.edu!uunet!mcsun!hp4nl!tuegate.tue.nl!tuewsd!wsinpdb
From: wsinpdb@lso.win.tue.nl (Paul de Bra)
Newsgroups: comp.sys.att,comp.unix.i386
Subject: Paradise VGA on Unix 3.2.2
Message-ID: <1178@tuewsd.win.tue.nl>
Date: 9 May 90 07:44:55 GMT
Sender: wsinpdb@win.tue.nl (Paul de Bra)
Organization: Eindhoven University of Technology, The Netherlands
Lines: 34

A while ago I posted a patch to /etc/conf/pack.d/kd/Driver.o
to make AT&T Unix 3.2.1 believe that a Paradise VGA+16 is a VDC600.
(The patch makes it believe that any VGA is a VDC600, but other
VGA boards will still not function with this patch.)

Several people asked for a patch for Unix 3.2.2 (which I don't have).

Here it is, courtasy of Tony Field, who, upon my instructions, found the
corresponding byte in 3.2.2:

"The Driver.o function "kdunlk_vdc600()" is called in three places
"providing the variable "Vdc" is set to 0x04. Function "kdck_vdc()" checks
"the video board and sets "Vdc".  
"
"To force the setting of "Vdc = 0x04", i changed a "je" to a "jne" at
"address 0x325b in Driver.o.   I.e.:
"
"        byte 0x325b  was "t",  becomes "u"
"
"This single byte change was all that was necessary to ensure that
"the Paradise+16 board would work in 800x600 mode for X on my 3.2.2
"edition of unix.

Let me just warn people again that this patch has ONLY been tested with
the Paradise VGA+16. It might work with some other boards based on the
Paradise chip set, but certainly will not work on boards with a different
chip set. Furthermore, with the patch applied, the original VDC600
will no longer work!

Enjoy!

Paul.

(debra@research.att.com)