Category: <b>memory management</b>
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<pre><b>INT 67 - LIM EMS 4.0 - ALTERNATE MAP REGISTER SET - DMA REGISTERS</b>

	AH = 5Bh
	AL = subfunction
	    05h allocate DMA register set
		Return: BL = DMA register set number, 00h if not supported
	    06h enable DMA on alternate map register set
	       BL = DMA register set number
	       DL = DMA channel number
	    07h disable DMA on alternate map register set
	       BL = DMA register set number
	    08h deallocate DMA register set
	       BL = DMA register set number
Return: AH = status (00h,80h,81h,84h,8Fh,9Ah-9Fh,A3h,A4h) (see <a href=../../it/56/36.html>#03656</a>)
Note:	this function is for use by operating systems only, and can be
	  enabled or disabled at any time by the operating system
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