Mac OS 9.1 set primary display

#1 Thu, 23 Jul 2015 - 12:16 68kMLA

Hi there

I have a PM8500, which I'm repairing. Just got the video card finally working but it won't let me set the primary display. It's outputting video from the PCI video card as a secondary monitor. So I have no menu, just the wallpaper. How do I tell Mac OS that the vga out of the rage128 is displayed 1?

#2 Thu, 23 Jul 2015 - 16:40 68kMLA

Did you try zapping the pram? If that doesn't do it boot with monitor attached to primary go to control panel displays the swap 1 and 2 and that should do it.

#3 Thu, 23 Jul 2015 - 17:08 68kMLA

Hi thanks

I kinda figured it out in the end. When I thought I'd swapped the screens around, I'd actually only mirrored them. It worked while ever I had my apple - vga adaptor connected to the rear of the machine, while the monitor was plugged in to the ATI rage. I guess the onboard video port, thought the adaptor was actually a monitor.

Everytime I unplugged it the vga out on the rage would go weird. Finally realised I needed to move the menu / task bar over to the other desktop, so that it became the primary display. Lord what a faff!! That was more stress then rebuilding the thing!