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Int 15 Fn CE - Later Ps/2s - Allocate Dma Arbitration Level [B]
AH = CEh
BL = 00h-0Eh arbitration level to be allocated
0Fh-FFh reserved
AL = option byte
bit 7-1: reserved (0)
bit 0: 0 = need DMA channel for arbitration level requested
1 = no channel required for arbitration level
Return: CF set on error
AH = status (80h,86h = function not supported)
CF clear on success
AL = channel number
00h-07h channel number allocated for the arbiration level
08h-FEh reserved
FFh no channel requested for arbitration level
AH = status
00h success
01h arbitration level not available
02h channel not available
03h invalid arbitration level passed
Notes: arbitration level 00h has the highest priority, 0Eh the lowest
to perform a DMA transfer operation, be sure to call this function
first, and call AH=CFh afterward. Failure to use this function
can cause unpredictable results.
See Also: AH=CFh
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