Specifications

AMD Geode™ GeodeROM Functional Specification 195
Video BIOS Support
32087C
Returns:
13.2.5 Function 04h: VBE Save/Restore State
This function saves or restores the state of the video controller. Note that this function call is a superset of the Standard
VGA BIOS Function 1Ch. Just like Function 1Ch, there are three subfunctions:
13.2.5.1 Subfunction 00h: Return Buffer Size in BX
Passed:
Returns:
13.2.5.2 Subfunction 01h: Save State
Description:
Saves the state of the video controller. The value in CX is a bit field where each bit corresponds to a section of the
video controller to save.
Passed:
Returns:
Parameter Description
AX VBE return status
BX Mode:
Bits[13:0] = Mode number
Bit[14] = Linear frame buffer flag
Bit[15] = Don’t clear memory flag
Parameter Description
AH 4Fh
AL 04h
DL 00h
Parameter Description
AX VBE return status
BX Number 64-byte blocks
Parameter Description
AH 4Fh
AL 04h
DL 01h
CX Save/Restore flags:
Bit 0 = Standard VGA register/hardware state
Bit 1 = BIOS data state
Bit 2 = RAMDAC state
Bit 3 = Extended register/hardware state
ES:BX Pointer to save buffer
Parameter Description
AX VBE return status