Specifications

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

Desc: display a character on the screen, advancing the cursor and scrolling

the screen as necessary

Notes: characters 07h (BEL), 08h (BS), 0Ah (LF), and 0Dh (CR) are interpreted

and do the expected things

IBM PC ROMs dated 1981/4/24 and 1981/10/19 require that BH be the same

as the current active page

BUG: if the write causes the screen to scroll, BP is destroyed by BIOSes

for which AH=06h destroys BP

SeeAlso: AH=02h,AH=06h,AH=0Ah

--------b-100E--CXABCD-----------------------

INT 10 - V20-XT-BIOS - TELETYPE OUTPUT WITH ATTRIBUTE

AH = 0Eh

CX = ABCDh

BP = ABCDh

AL = character to write

BH = page number

BL = foreground color (text modes as well as graphics modes)

Return: nothing

Program: V20-XT-BIOS is a ROM BIOS replacement with extensions by Peter

Koehlmann / c't magazine

Desc: display a character on the screen, advancing the cursor and scrolling

the screen as necessary

Notes: characters 07h (BEL), 08h (BS), 0Ah (LF), and 0Dh (CR) are interpreted

and do the expected things

SeeAlso: INT 15/AH=84h"V20-XT-BIOS"

--------V-100F-------------------------------

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)

-59-

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