INT 10 - FRIEZE v7.41+ - INSTALLATION CHECK                                     
	AH = 0Fh
	SI = F123h
	DI = 321Fh
Return: AH = number of character columns
	AL = display mode (see #00010 at AH=00h)
	BH = active page (see AH=05h)
	SI = DI = F345h if installed
Notes:	if mode was set with bit 7 set ("no blanking"), the returned mode will
	  also have bit 7 set
	EGAEnhanced Graphics Adapter(Enhanced Graphics Adapter) IBMInternational Busiuness Machines's second color video board for the IBMInternational Busiuness Machines PCIBM PC family, capable of a maximum resolution of 640x350 pixels in 16 simultaneous colors of a total of 64 possible colors., VGAVideo Graphics Array(Video Graphics Array) The video adapter introduced with the IBMInternational Busiuness Machines PS/2IBM PS/2, any model series of computers., and UltraVision return either AL=03h (color) or AL=07h
	  (monochrome) in all extended-row text modes
SeeAlso: AH=0Fh"VIDEO",AH=4Bh"FRIEZE"