SPC8106 S-MOS Systems, SPC8106 Datasheet - Page 191
SPC8106
Manufacturer Part Number
SPC8106
Description
LCD/CRT VGA CONTROLLER
Manufacturer
S-MOS Systems
Datasheet
1.SPC8106.pdf
(432 pages)
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Functions 14h to 19h are reserved by VGA definition. Any requests of these functions will just
simply return and nothing happens.
SPC8106
Function 13h - Write String Functions
If any scrolling occurs, the active page will be scrolled, not the requested page! This “feature” is
also present in IBM's code and it has been determined that it is better to reproduce this in our
code for compatibility.
Function 14h To Function 19h - Null Functions
Function 1Ah - Read/Write Display Combination Code
411-1.0
Input:
Return:
Input:
Return:
Input:
Return:
Input:
Return:
S-MOS Systems, Inc. • Tel: (408) 922-0200 • Fax: (408) 922-0238 • http://www.smos.com
AH=12h
BL=36h
AL
AL=12h
AH=13h
AL
BL
BH
CX
DX
ES:BP
n/a
n/a
n/a
AH=1Ah
AL
BL
BH
AL=1Ah
BX
Miscellaneous Function
Video data control
0=enable, 1=disable
Write String function
String function
0 - BL=attribute, string=char, char,...
1 - BL=attribute, string=char, char, ... cursor moved
2 - String=char, attr, char, attr...
3 - String=char, attr, char, attr ... cursor moved
Attribute (if AL=0 or 1)
Page number
Character count
Start cursor position
String pointer
Read/write Display Combination Code
0=read, 1=write
Active DCC (r/w)
Alternate DCC (r/w)
Set as above
(VGA)
X12-SP-002-03.1
(VGA)
(VGA)
BIOS Functional Specification
SP2-21
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