SPC8104 S-MOS Systems, SPC8104 Datasheet - Page 126

• Manufacturer Part Number: SPC8104
• Description: VGA LCD CONTROLLER
• Manufacturer: S-MOS Systems

The format of the information block is as follows:
BIOS Functional Specification
SP2-20
Function 1Bh - Return Functionality/State Information
1. This table indicates no support for Mode 13h.
Return:
Input:
Return:
Offset
00
04
05
07
09
0B 8h x DW
1B
1D
1E
20
21
22
23
25
26
27
29
2A
2B
2C
2D
2E 3h x DB
31
32
33 Dh x DB
S-MOS Systems, Inc. • Tel: [phone] • Fax: [phone] • http://www.smos.com
BL
BH
AL=1Ah
BX
AH=1Bh
BX
ES:DI
AL=1Bh
ES:DI
Type
DD
DB
DW
DW
DW
DW
DB
DW
DB
DB
DB
DW
DB
DB
DW
DB
DB
DB
DB
DB
DB
DB
Description
Pointer to static functionality table
CRT video mode----------------------+
CRT columns
VRAM page length
VRAM start address
Cursor row/column for 8 pages
Cursor type
Active page
CRTC address
Port 3D8 data
Port 3D9 data
Number of rows
Point size
Active DCC
Auxiliary DCC
Number of colors this mode
Number of pages this mode
Number of scans this mode (0=200 1=350 2=400 3=480)
Primary character block
Secondary character block
Misc. state info (see table below)
Reserved (set to zero)
VRAM size (0=64K 1=128K 2=192K 3=256K)
Save pointer state info (see table below)
Reserved (set to zero)
Active DCC (r/w)
Alternate DCC (r/w)
Set as above
Return Functionality/State Information
Implementation type (must be 00)
Pointer to buffer
Contains information
------------------------+
X15-SP-002-03
|
|
|
+These are values
|directly copied
|from low memory.
|
|
|
|
1
412-1.0
SPC8104