Category: video

INT 10 - EGA Register Interface Library - WRITE ONE REGISTER

	AH = F1h
	DX = group index (see #00223)
	    if single register:
		BL = value to write
		BL = register number
		BH = value to write
Return: BL = data
Note:	the RIL is provided by EGA.SYS, the Microsoft Mouse driver, the OS/2
	  compatibility box, and others
SeeAlso: AX=7F05h,AH=F0h"EGA",AH=F3h"EGA",AH=FAh"EGA"