INT 15 - Tandy 1000 Model ??? - SET ROM PAGE

	AX = 7003h
	DL = ROM page to be mapped at 0E0000h (0-6 (13?))
Return: CF clear if valid ROM page specified
Note:	Some Tandy machines have DOS and DeskMate in a 512k paged ROM.	The
	  BIOS uses this call to map ROM pages in the 64k segment at 0E0000h.
	The 1000TL has 8 64k ROM pages; page 7 is permanently mapped at
	  0F0000h.  There may be 16 32k ROM pages on other systems.
SeeAlso: AX=7002h,INT E0"DeskMate"