INT 10 - VIDEO - PCjr, Tandy 1000 - GET CRT/CPU PAGE REGISTERS

	AX = 0580h
Return: BH = CRT page register
	BL = CPU page register
Notes:	the CPU page determines which 16K block of the first 128K of physical
	  memory will be mapped at B800h by the hardware
	the CRT page determines the start address of the memory used by the
	  video controller
SeeAlso: AH=05h"SET CRT/CPU"