INT 31 P - CauseWay - "GetMemLinear" - ALLOCATE MEMORY WITHOUT SELECTOR
	AX = FF10h
	CX:DX = size of block in bytes
Return: CF clear if successful
	    SI:DI = linear address of allocated block
	CF set on error
Note:	this function may return addresses above 16M
SeeAlso: AX=FF0Bh,AX=FF11h,AX=FF12h,AX=FF14h