
supposed to be Window 1, but a cut'n'paste error made it stomp over Window 0, thus breaking ISA DMA. Fix this. (Confirmed to work with floppy driver.) While I'm here, do something I've been meaning to do for a while: change Window 1 from a 1G at 2G to a 2G at 2G direct-mapped window, and add a Window 2 of 1G at 1G SGMAP-mapped. Chain Window 2 to Window 1, and use it as a fall-back for PCI DMA if the system has more than 2G of RAM.
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