Function 0F4h   Microsoft Mouse driver EGA support - Read Register Set 

entry   AH      0F4h 

	CX      number of registers (1) 

	ES:BX   pointer to table of records in this format: 

	  bytes 1-2 group index 

		(pointer/data chips) 

		00h     CRTC (3B4h mono modes, 3D4h color modes) 

		08h     sequencer 3C4h 

		10h     graphics controller 3CEh 

		18h     attribute controller 3C0h 

		(single registers) 

		20h     miscellaneous output register 3C2h 

		28h     feature control register (3BAh mono modes, 3DAh color) 

		30h     graphics 1 position register 3CCh 

		38h     graphics 2 position register 3CAh 

	 byte 3 register number (0 for single registers) 

	 byte 4 register value