Path: utzoo!mnetor!uunet!husc6!bloom-beacon!mit-eddie!uw-beaver!cornell!rochester!pt.cs.cmu.edu!andrew.cmu.edu!jg2f+
From: jg2f+@andrew.cmu.edu (Jude Anand George)
Newsgroups: comp.sys.mac
Subject: Dual Video Card Problem
Message-ID: <4WSbwyy00XoCMPY0Mi@andrew.cmu.edu>
Date: 1 May 88 01:28:30 GMT
Organization: Carnegie Mellon
Lines: 62

Help!!!

I have two video cards in my Mac II, a 16-bit one driving an Apple color
monitor and a 4 bit one driving an Apple greyscale monitor.  I have recently
upgraded the latter from 4 to 16-bit, expecting to get 256 shades on each
monitor.  Not so.  Although they both show up as having 256 in the 'monitors'
CDEV, one will display 256 while the other displays something between 16 and
256.  The one that works properly is always the monitor that currently has the
menu bar set to it (with the monitors CDEV);  therefore it doesn't seem to be
hardware dependent.  Also, if I take either video card out and just use the
other one, it works fine, with the maximum 256 colors.  (I am testing this by
running the MandelColor program).  The problem isn't with the individual
monitors, either, since I have swapped them and the problem remains the same.
I have also put the cards in various slots with no effect.  It seems to be
dependent only on which monitor currently has the menu bar in it (i.e., is the
main screen).  It does not depend on whether or not I have it set to color or
greyscale in the CDEV.

If you know anything about Mac II video, please help!  I especially need to
know soon if it is a hardware problem, because the warranty on one of my video
cards runs out in 4 days.

--Jude George
INTERNET: jg2f@andrew.cmu.edu
CIS: 72307,1752

By the way, if it will help your diagnosis, I have the old ROMs, and am using
QuickerGraf v1.0.  It also doesn't seem to be a software problem, because I
replaced the system files, and got the same results.  I went into ResEdit to
look at the scrn resource in the system anyways, and this is what it gives me:

scrn ID=0 from System

Num devices=2

****
sRsrc type                      $0001
Nubus slot (card slot+8)                $0009
dctlDevBase                     $F9900000
mode sRsrcID                    131
flagMask ($77FE)                        $77FE
Is active                               1
Is main scrn                    1
Is color                                1
CLUT rsrcID                     -1
gamma corr. rsrcID              -1
Glob. rect                      0 0 480 640
control calls                   0

****
sRsrc type                      $0001
Nubus slot (card slot+8)                $000A
dCtlDevBase                     $FAA00000
Mode sRsrcID                    131
flagMask ($77FE)                        $77FE
Is active                               1
is main scrn                    0
is color                                0
CLUT rsrcID                     -1
gamma corr. rsrcID              -1
Glob. rect                      0 640 480 1280
control calls                   0