INT 94 u - PCM driver - FIND VALID DMAsee Direct Memory Access BUFFER IN HUGE MEMORY BLOCK
	SI = 000Bh
	ES:BX -> parameters (see #04000)
Return: ???
SeeAlso: SI=0003h


Format of PCM driver functio 000Bh parameters:
Offset	Size	Description	(Table 04000)
 00h	DWORDDoubleword; four bytes.	 Commonly used to hold a 32-bit segment:offset or selector:offset address.	-> memory block to contain DMAsee Direct Memory Access buffer
 04h	WORD	desired size of DMAsee Direct Memory Access buffer