Category: video
INT 10 - VIDEO - READ CHARACTER AND ATTRIBUTE AT CURSOR POSITION AH = 08h BH = page number (00h to number of pages - 1) (see #00010) Return: AH = character's attribute (text mode only) (see #00014) AH = character's color (Tandy 2000 graphics mode only) AL = character Notes: for monochrome displays, a foreground of 1 with background 0 is underlined the blink bit may be reprogrammed to enable intense background colors using AX=1003h or by programming the CRT controller the foreground intensity bit (3) can be programmed to switch between character sets A and B on EGA and VGA cards, thus enabling 512 simultaneous characters on screen. In this case the bit's usual function (intensity) is regularly turned off. in graphics modes, only characters drawn with white foreground pixels are matched by the pattern-comparison routine on the Tandy 2000, BH=FFh specifies that the current page should be used because of the IBM BIOS specifications, there may exist some clone BIOSes which do not preserve SI or DI; the Novell DOS kernel preserves SI, DI, and BP before many INT 10h calls to avoid problems due to those registers not being preserved by the BIOS. BUG: some IBM PC ROM BIOSes destroy BP when in graphics modes SeeAlso: AH=09h,AX=1003h,AX=1103h,AH=12h/BL=37h,AX=5001h