INT 15 - DESQview v2.00+ - "GETMEM" - ALLOCATE "SYSTEM" MEMORY
	AX = DE0Ch
	BX = number of bytes
Return: ES:DI -> allocated block or 0000h:0000h (DV 2.26+)
Note:	use SETERROR (AX=DE15h) to avoid a user prompt if there is insufficient
	  system memory
SeeAlso: AX=1001h,AX=102Eh,AX=DE0Dh,AX=DE15h,AX=DE19h