Int 10H, AH=08H

IBM 5150 and higher

Get character and attribute undr cursor

@GetChAtr/@GetCharAtr

VioReadCellStr VioReadCharStr

• AH = 08h
• BH = page number

• AH - attribute
• AL - character

INCLUDE BIOS.INC
 
@GetChAtr 0

• 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.
• some IBM PC ROM BIOSes destroy BP when in graphics modes
• Text based on Ralf Brown Interrupt List Release 61