SPC8104 S-MOS Systems, SPC8104 Datasheet - Page 127

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

The format of the save buffer is as follows:
SPC8104
Function 1Ch - Save/Restore Video State
While emulating IBM code this function does not save the latch data or color select register 14h
of the Attributes Controller. Because it doesn't get saved or restored, we don't touch it at all.
412-1.0
Input:
Return:
7 6 5 4 3 2 1 0
7 6 5 4 3 2 1 0
S-MOS Systems, Inc. • Tel: [phone] • Fax: [phone] • http://www.smos.com
AH=1Ch
AL
ES:BX
CX
AL=1Ch
BX
Table 0-1 Information Block Offset 2D
Table 0-2 Information Block Offset 32
B I T S
B I T S
Save/Restore Video State
Function request (0-2)
00 - Return size of buffer
01 - Save video state
02 - Restore video state
Pointer to buffer
Bit map of request
001 - Video h/w status
010 - Video data arena
100 - Video DAC and color registers
Buffer size if AL input =00
Sum to Gray
Gray-Scale Display
Keep Palette / DAC on Mode Set
Cursor Emulation
Parameter Pointer Save Set
Aux Alpha Pointer Set
Aux Graphics Pointer Set
User PAlette Profile Pointer Set
Single CRT
Blink / Bold Bit
Reserved
Second Aux Alpha Pointer Set
DCC Table Pointer Set
Reserved
X15-SP-002-03
BIOS Functional Specification
SP2-21