INT 31 - CauseWay - "GetMem32" - ALLOCATE BLOCK OF MEMORY (32-bit)

	AX = FF0Ch
	ECX = size in bytes (FFFFFFFFh to get size of largest available block)
Return: CF clear if successful
	    BX = selector for accessing block if requested size not FFFFh:FFFFh
	    ECX = size of largest available block if requested FFFFh:FFFFh
	CF set on error
SeeAlso: AX=FF0Bh,AX=FF0Eh,AX=FF0Fh,AX=FF11h