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Call VADMAD entry point with

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DX = operation
0000h set VADMAD mode
Data: AX


desired mode
0001h set VADMAD channel
Data: AX


desired channel
Notes: After setting mode/channel, start the DMA operation with an OUT to I/O port 0Bh (channels 0-3) or D6h (channels 4-7).
See Also:  #01268 at INT 20"Windows"