7 Apr
2007
7 Apr
'07
11:11 p.m.
Jim Leonard wrote:
That reminds me...
Interrupt list (e.g. at http://www.cs.cmu.edu/~ralf/files.html) and scroll
down a bit to "RBdualVGA":
A set of programs for using two color SuperVGA cards in one PC. Includes
a TSR for swapping between displays and blanking both screens when the
system is not being used.
.. anyone know how the heck that works? I don't get how you can even boot a
system with two video boards that are going to both expect to have ROM code
and ports at the same addresses. Even if you could somehow disable the BIOS on
one of them, there's still a bunch of conflicting port addresses to worry about.
cheers
Jules
Having CGA and
VGA on the
same machine with dual monitors would be kind of interesting.
It certainly would be, considering that it's impossible :-) CGA and VGA
both have adapter RAM at B800:0000.