Intermec 6100 Reference Guide
SECTION 6
Conversions and Interfaces
PEN*KEY
R
6100 Computer Programmer’s Reference Guide 6-51
Video, Alternate Settings: (AH=12h) Interrupt 10h
INT 10h, Function AH = 12h, Subfunction 10h: Get Video Configuration Info
BIOS
Returns configuration information for the video system. Feature bits are set
Returns configuration information for the video system. Feature bits are set
from the input status register 0 in response to an output on the following speciĆ
fied feature control register bits. Bits 0ć3 in CL indicate the state of VGA dip
switches 1ć4, respectively.
Feature Bits (CH) Feature Control Output Bit Input Status Bit
0
0
5
1
0
6
2
1
5
3
1
6
4ć7
Not used
---
On Entry:
AH = 12h
BL = 10h
On Return:
BH = Display type:
0 = Color
1 = Monochrome
BL = Memory installed on VGA board:
0 = 64k
1 = 128k
2 = 192k
3 = 256k
CH = Feature bits
CL = Switch settings
INT 10h, Function AH = 12h, Subfunction 30h: Set Scan Lines
BIOS
Selects the number of scan lines for text modes. The selected value takes effect
Selects the number of scan lines for text modes. The selected value takes effect
the next time the set display mode function is performed.
On Entry:
On Entry:
AH = 12h
BL = 30h
AL = 0 = 200 scan lines
1 = 350 scan lines
2 = 400 scan lines
On Return:
AL = 12h = VGA active
00h = VGA not active
6. Conversions and
Interfaces