Specifications

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

01h no buffer, fill emptied rows/columns with blanks

BL = direction in which to scroll

00h up

01h down

02h left

03h right

CH,CL = row,column of upper left corner of scroll area

DH,DL = row,column of lower right corner

Return: nothing

Notes: this interrupt is identical to INT 52 on Tandy 2000

the user buffer, if supplied, must be organized by row; regardless of

the scroll direction, all character/attribute pairs for the first

row are first, then the pairs for the second row, etc.

SeeAlso: AH=00h,AH=0Bh/BH=02h,AH=11h"Tandy 2000",AH=12h"Tandy 2000"

SeeAlso: INT 52"Tandy"

--------V-1012--BL10-------------------------

INT 10 - VIDEO - ALTERNATE FUNCTION SELECT (PS, EGA, VGA, MCGA) - GET EGA INFO

AH = 12h

BL = 10h

Return: BH = video state

00h color mode in effect (I/O port 3Dxh)

01h mono mode in effect (I/O port 3Bxh)

BL = installed memory (00h = 64K, 01h = 128K, 02h = 192K, 03h = 256K)

CH = feature connector bits (see #00022)

CL = switch settings (see #00023,#00024)

AH destroyed (at least by Tseng ET4000 BIOS v8.00n)

Note: one possible check for the presence of an EGA or later display card

is to call this function with BH=FFh; if not present, BH will be

unchanged on return

another installation check is used by Athena Digital's HGCIBM, which

sets CX to FFFFh on calling and checks whether it has been changed

on return

Index: installation check;EGA

Bitfields for feature connector bits:

Bit(s) Description (Table 00022)

0 FEAT 1 line, state 2

1 FEAT 0 line, state 2

2 FEAT 1 line, state 1

3 FEAT 0 line, state 1

4-7 unused (0)

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