Specifications

D:\D\inter61a\INTERRUP.A Saturday, January 08, 2011 11:31 AM

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

Bitfields for character's display attribute:

Bit(s) Description (Table 00014)

7 foreground blink or (alternate) background bright (see also AX=1003h)

6-4 background color (see #00015)

3 foreground bright or (alternate) alternate character set (see AX=1103h)

2-0 foreground color (see #00015)

SeeAlso: #00026

(Table 00015)

Values for character color:

Normal Bright

000b black dark gray

001b blue light blue

010b green light green

011b cyan light cyan

100b red light red

101b magenta light magenta

110b brown yellow

111b light gray white

--------V-1009-------------------------------

INT 10 - VIDEO - WRITE CHARACTER AND ATTRIBUTE AT CURSOR POSITION

AH = 09h

AL = character to display

BH = page number (00h to number of pages - 1) (see #00010)

background color in 256-color graphics modes (ET4000)

BL = attribute (text mode) or color (graphics mode)

if bit 7 set in <256-color graphics mode, character is XOR'ed

onto screen

CX = number of times to write character

Return: nothing

Notes: all characters are displayed, including CR, LF, and BS

replication count in CX may produce an unpredictable result in graphics

modes if it is greater than the number of positions remaining in the

-56-

http://www.foxitsoftware.com For evaluation only.