INT 12 - KEYBUI v2.0+ - INSTALLATION CHECK

	CX = 1806h
Return: AX = kilobytes of contiguous memory starting at absolute address 00000h
	CX = 1960h if installed
Program: KEYBUI is a resident keyboard driver by Johan Zwiekhorst which allows
	  accented characters and box drawing on standard QWERTY keyboards; it
	  also provides break-to-DOS and screen blanking capabilities
SeeAlso: INT 14/AX=AA01h
Index:	screen saver;KEYBUI