With Michael Z's help, I was able to figure out enough of this page

http://www.linkclub.or.jp/~gabezing/

To get my performa 575  to work at 800x600. It now thinks it has a SVGA monitor
attached. It works great in MacOS so of course I wanted to see how it would
work at 800x600 in netbsd1.3.3. I have mrg kernel 104. There is an odd
glitch in the video, below is the dmesg. What happens is following the
display of the sense...

intvid0 at obio0 @ f9001000: DAFB video subsystem, monitor sense 0

The display of all of the following text starting at 

intvid0: 800 x 600, 65536 color

shifts to the middle of the screen and stays there....

After I log in and run X, the display is off the same way, the graphics
start in the middle of the screen and wrap around back to the middle.

It doesn't look like a sync problem, it looks like a miscalculation in
row/column offsets to me.

Any ideas?

Bob
----- Forwarded message from Charlie Root -----

[ preserving 358328 bytes of netbsd a.out symbol table ]
Copyright (c) 1996, 1997, 1998, 1999
    The NetBSD Foundation, Inc.  All rights reserved.
Copyright (c) 1982, 1986, 1989, 1991, 1993
    The Regents of the University of California.  All rights reserved.

NetBSD 1.3K (MRG) #104: Mon Mar 22 08:46:15 PST 1999
    root2@c610:/usr/src/sys/arch/mac68k/compile/MRG
Apple Macintosh LC 575  (68040)
cpu: delay factor 382
real mem = 37748736
avail mem = 31641600
using 486 buffers containing 1990656 bytes of memory
mrg: 'MacLC575 ROMs' ROM glue, tracing off, debug off, silent traps
mrg: I/O map kludge for ROMs that use hardware addresses directly.
mainbus0 (root)
obio0 at mainbus0
adb0 at obio0 (mrg)  \^H\^H\^H\^H\^H\^H: 2 targets
aed0 at adb0 addr 0: ADB Event device
kbd0 at adb0 addr 2: extended keyboard
ms0 at adb0 addr 3: 1-button, 100 dpi mouse
asc0 at obio0: Apple Sound Chip
intvid0 at obio0 @ f9001000: DAFB video subsystem, monitor sense 0
intvid0: 800 x 600, 65536 color
grf0 at intvid0
ite at grf0 not configured
sn0 at obio0 address 00:a0:40:2b:c6:24
iwm0 at obio0: Apple GCR floppy disk controller
iwm: Initialization FAILED (-77)
esp0 at obio0 (quick): address 0x81c000: NCR53C96, 16MHz, SCSI ID 7
scsibus0 at esp0: 8 targets, 8 luns per target
sd0 at scsibus0 targ 0 lun 0: <SEAGATE, ST51080N, 0943> SCSI2 0/direct fixed
sd0: 1030MB, 4826 cyl, 4 head, 109 sec, 512 bytes/sect x 2109840 sectors
sd1 at scsibus0 targ 1 lun 0: <QUANTUM, EMPIRE_1080S, 1242> SCSI2 0/direct fixed
sd1: 1029MB, 2874 cyl, 8 head, 91 sec, 512 bytes/sect x 2109376 sectors
cd0 at scsibus0 targ 3 lun 0: <MATSHITA, CD-ROM CR-8004A, 2.0a> SCSI2 5/cdrom removable
sd2 at scsibus0 targ 4 lun 0: <SEAGATE, ST51080N, 0943> SCSI2 0/direct fixed
sd2: 1030MB, 4826 cyl, 4 head, 109 sec, 512 bytes/sect x 2109840 sectors
zsc0 at obio0 chip type 0 
zsc0 channel 0: d_speed   9600 DCD clk 0 CTS clk 0
zstty0 at zsc0 channel 0
zsc0 channel 1: d_speed   9600 DCD clk 0 CTS clk 0
zstty1 at zsc0 channel 1
nubus0 at mainbus0
fpu0 at mainbus0 (mc68040)
boot device: sd1
root on sd1a dumps on sd1b
PRAM: 0x3704eba8, macos_boottime: 0x3704eba5.
root file system type: ffs

----- End of forwarded message from Charlie Root -----

-- 
Robert E. Brose II    N0QBJ
http://www.jriver.com/~bob/
bob@kunk.jriver.com