SPC8106 S-MOS Systems, SPC8106 Datasheet - Page 195

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

5.0
These functions are defined by the Video Electronics Standards Association. They cover issues of
inquiry on chip capability, and available modes. The following section shows the SPC8106 imple-
mentation of these functions. The SPC8106 BIOS supports VESA VBE Core functions 1.2, VBE/
PM functions 1.0 and VBE/DDC function 1.0. BIOS version 2.0 will support VBE Core functions
2.0.
5.1
Every function returns status information in the AX register. The format of the status word is as
follows:
5.2
SPC8106
Function 00h - Return VBE Controller Information
Function 01h - Return VBE Mode Information
All other registers are preserved.
411-1.0
All other registers are preserved.
Input:
Return:
Input:
Return:
VESA VBE FUNCTION SUMMARY
Status Information
VESA Functions
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AL ==
AL !=
AH ==
AH ==
AH ==
AH ==
AX
ES:DI
AX
AX
CX
ES:DI
AX
4Fh:
4Fh:
00h:
01h:
02h:
03h:
= 4F00h
=
=
= 4F01h
=
=
=
Function is supported
Function is not supported
Function call successful
Function call failed
Software supports this function, but the hardware does
not
Function call invalid in current video mode
Return VBE Controller Information
Pointer to buffer in which to place VbeInfoBlock
structure (VbeSignature should be set to 'VBE2' when
function is called to indicate VBE 2.0 information is
desired and the information block is 512 bytes in
size.)
VBE Return Status
Return VBE mode information
Mode number
Pointer to ModeInfoBlock structure
VBE Return Status
X12-SP-002-03.1
BIOS Functional Specification
SP2-25