9 Apr
2007
9 Apr
'07
2:27 a.m.
On 8 Apr 2007 at 16:50, Jules Richardson wrote:
Maybe I'm wrong; my assumption was that the BIOS
would scan the bus and say
something like: "ahh, you're a such-and-such class of hardware, locate your
I/O here please" and would then choke when it tried to stick two video boards
in the same place.
Ah, but when you're dealing with PCI video cards, only the first one
is initialized if there's a possible conflict of resources (such as a
BIOS extension ROM). The two-monitor trick initializes the second
one when the switcher program is loaded. As far as I can tell, no
BIOS extension ROM is executed for that one.
Clearly, you'll be better off if the cards are of the same type, or
at least share compatibility in the video modes that you'll be using.
Cheers,
Chuck