Sound Blaster hack: EMF "Internal Damage" demo seems to use port 22Dh to
talk to the DSP instead of 22Ch. I added a dosbox.conf option (disabled
by default) to alias I/O ports by ignoring bit 0 (port 22D -> 22C, 22B
-> 22A, etc) which seems to help the demo enable it's Sound Blaster mode
(though with a lot of noise and hash, perhaps another problem). The real
question: Did the original Sound Blaster 1.x and 2.x (not Pro) cards
alias I/O ports like that?