Specifications

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

Bitfields for switch settings:

Bit(s) Description (Table 00023)

0 switch 1 OFF

1 switch 2 OFF

2 switch 3 OFF

3 switch 4 OFF

4-7 unused

(Table 00024)

Values for switch settings on original EGA/VGA:

00h primary MDA/HGC, secondary EGA+ 40x25

01h-03h primary MDA/HGC, secondary EGA+ 80x25

04h primary CGA 40x25, secondary EGA+ 80x25 mono

05h primary CGA 80x25, secondary EGA+ 80x25 mono

06h primary EGA+ 40x25, secondary MDA/HGC (optional)

07h-09h primary EGA+ 80x25, secondary MDA/HGC (optional)

0Ah primary EGA+ 80x25 mono,secondary CGA 40x25 (optional)

0Bh primary EGA+ 80x25 mono,secondary CGA 80x25 (optional)

--------V-1012--BL11-------------------------

INT 10 - VIDEO - Trident TVGA 8800/8900/9000 BIOS - GET BIOS INFO

AH = 12h

BL = 11h

Return: AL = 12h if function supported

BL = ??? (10h)

ES:BP -> BIOS info structure (see #00025)

SeeAlso: AH=12h/BL=12h"TRIDENT"

Format of Trident BIOS Info structure:

Offset Size Description (Table 00025)

00h BYTE ??? (0000h)

01h BYTE OEM Code (00h for original Trident)

02h WORD ID??? (1073h for 8800BR, 1074 for 8800CS)

04h 8 BYTEs BIOS date ('mm/dd/yy')

0Ch WORD ???

0Eh 8 BYTEs BIOS Version (' C3-128 ', ' C3-129 ')

--------V-1012--BL12-------------------------

INT 10 - VIDEO - Trident TVGA 8800/8900/9000 BIOS - GET VIDEO RAM SIZE

AH = 12h

BL = 12h

Return: AL = 12h if function supported

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