SPC8106 S-MOS Systems, SPC8106 Datasheet - Page 183

• Manufacturer Part Number: SPC8106
• Description: LCD/CRT VGA CONTROLLER
• Manufacturer: S-MOS Systems

4.0
4.1
These functions are the IBM defined functions that are supported on all VGA compatible prod-
ucts. These functions are supported in the SPC8106 BIOS with the noted exceptions. These func-
tions are called using the standard INT 10h interface. To call these functions:
SPC8106
Function 00h - Set Video Mode
Function 01h - Set Cursor Type
Function 02h - Set Cursor Position
Function 03h - Read Cursor Position
Function 04h - Read Lightpen Position (Unsupported On VGA)
411-1.0
MOV AH, function number
MOV other register, other parameters
INT 10H
Input:
Return:
Input:
Return:
Input:
Return:
Destroyed:AX,SI
Input:
Return:
Input:
Return:
MAIN BIOS FUNCTION SUMMARY
Supported BIOS Functions
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AH=00h
AL
n/a
AH=01h
CH
CL
n/a
AH=02h
BH
DL
DH
n/a
AH=03h
BH
CX
DX
AH=04h
AH
Set Video Mode
Video mode (bit 7 set prevents VRAM clear)
Set Cursor Type
Cursor start scan
Cursor end scan
Set Cursor Position
Page number
Column (0-x)
Row (0-x)
Read Cursor Position
Page number
Current cursor mode
Current cursor position
Read Lightpen Position
Lightpen status (0=none, 1=active)
If AH=1 then:
BX - Pixel column
CX - Scan line
DX - Character row/column
X12-SP-002-03.1
BIOS Functional Specification
SP2-13