American Megatrends Super Voyager LPX, User Manual

Page: 134 / 200

Chapter 4 VGA BIOS
128
Super VGA Functions,
Continued
Function 04h Subfunction 00h Save/Restore Buffer Size
Saves and restores the SVGA video state. The functions are a superset of
the three subfunctions in standard INT 10h Function 1Ch Save and
Restore Video State. The complete SVGA video state except video
memory should be saved or restored by setting the requested states mask
in CX to 000Fh.
Input: AH = 4Fh SVGA support
AL = 04h Save/Restore SVGA video state
DL = 00h Return save/restore state buffer size
CX = Requested States
Bit 3 Save/restore SVGA state
Bit 2 Save/restore video DAC state
Bit 1 Save/restore video BIOS data state
Bit 0 Save/restore video hardware state
Output:
AX = Status
BX = Number of 64 byte blocks to hold the state buffer
All other registers are preserved
Function 04h Subfunction 01h Save Super VGA Video State
Input: AH = 4Fh SVGA support
AL = 04h Save/Restore SVGA video state
DL = 01h Save SVGA video state
CX = Requested States (see Subfunction 00h above)
ES:BX = Pointer to buffer
Output: AX = Status
All other registers are preserved