And this could potentially blow up both video cards, since they don't
typically have protection against two cards driving the bus at the
same time. (The Diamond Speedstar in my hand appears to use 74LS245's
to tristate the data lines, but if you connect the output of one to
the output of another when neither are tri-stated -- blammo!)
There are various web pages and FAQs discussing this. I have no references,
since it is just as easy for interested people to search for these as it is
for me.
The cases where you could potentially use two video cards (hardware limitation):
1 Both are on the PCI bus
2 One is on PCI and one is VGA on ISA (maybe)
3 VGA and MDA
4 You have a modified VGA card that translates bus addresses
Assuming you have such a combination ready, you must look for software that
can handle it. There is a commercial X server that handles multi-heading for
the PCI/PCI case. I've heard reports of people using MDA as a console and
VGA for X. Last I checked, there did not appear to be kernel support for
multiple consoles. (sounds like a fun project...)
dave...
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