mshiels@tmsoft.uucp (Michael A. Shiels) (08/31/90)
How do the multitudes of Bus master cards out there (Madge, Proteon etc) handle something like QEMM 386 filling in the area from A000-B800 on a CGA system so that you have ~90K more space for DOS. The problem is this memory is not actually at that address for the Bus master card to read it. I have heard of something called the VDS (Virtual DMA Specifications) which is part of the PS/2 BIOS to allow Bus Mastering on MCA machines. Does the same thing work/exist for ISA machines?