> Hi, > > Would anyone on this list by any chance know how to read the value of bit > 15 of address offset 0x40 of a PCI card whose IO base is 0xf800 and then > set it to 0? You might want to try PCISPY from matrox. Not too sure where it's located, but it is on matrox's site (probably in utilities). http://www.matrox.com/mga .