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100F

Category: video

INT 10 - VIDEO - GET CURRENT VIDEO MODE

	AH = 0Fh
Return: AH = number of character columns
	AL = display mode (see #00010 at AH=00h)
	BH = active page (see AH=05h)
Notes:	if mode was set with bit 7 set ("no blanking"), the returned mode will
	  also have bit 7 set
	EGA, VGA, and UltraVision return either AL=03h (color) or AL=07h
	  (monochrome) in all extended-row text modes
	HP 200LX returns AL=07h (monochrome) if mode was set to AL=21h
	  and always 80 resp. 40 columns in all text modes regardless of
	  current zoom setting (see AH=D0h)
	when using a Hercules Graphics Card, additional checks are necessary:
	    mode 05h: if WORD 0040h:0063h is 03B4h, may be in graphics page 1
		  (as set by DOSSHELL and other Microsoft software)
	    mode 06h: if WORD 0040h:0063h is 03B4h, may be in graphics page 0
		  (as set by DOSSHELL and other Microsoft software)
	    mode 07h: if BYTE 0040h:0065h bit 1 is set, Hercules card is in
		  graphics mode, with bit 7 indicating the page (mode set by
		  Hercules driver for Borland Turbo C)
	the Tandy 2000 BIOS is only documented as returning AL, not AH or BH
SeeAlso: AH=00h,AH=05h,AX=10F2h,AX=1130h,AX=CD04h,MEM 0040h:004Ah

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