SPC8104 S-MOS Systems, SPC8104 Datasheet - Page 130

• Manufacturer Part Number: SPC8104
• Description: VGA LCD 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 shows the SPC8104F0A implemen-
tation of these functions. The SPC8104F0A BIOS supports VESA VBE Core Functions 1.2, and
VBE/FP Functions 1.0. BIOS versions 2.x, to be specified later, will support VBE Core Functions
2.0, eliminating the need for the Sollex Extensions found in Section 6 of this document.
5.1
Every function returns status information in the AX register. The format of the status word is as
follows:
5.2
The mode information block has the following structure:
BIOS Functional Specification
SP2-24
Function 00h - Return VBE Controller Information
Function 01h - Return VBE Mode Information
All other registers are preserved.
Function 02h - Set VBE Mode
All other registers are preserved.
Input:
Return:
Input:
Return:
Input:
VESA VBE FUNCTION SUMMARY
Status Information
VESA Functions
S-MOS Systems, Inc. • Tel: [phone] • Fax: [phone] • http://www.smos.com
AL ==
AL !=
AH ==
AH ==
AH ==
AH ==
AX
ES:DI
AX
AX
CX
ES:DI
AX
AX
BX
4Fh:
4Fh:
00h:
01h:
02h:
03h:
= 4F00h
=
=
= 4F01h
=
=
=
= 4F02h
=
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
Set VBE Mode
Desired Mode to set
X15-SP-002-03
412-1.0
SPC8104