DOS/32 Advanced DOS Extender - Programmer's Reference


4.05 - VBE function 4F04h - Save/Restore SuperVGA State

 

In:

AX = 4F04h
DL = subfunction:

00h - get state buffer size
Returns: EBX = number of 64-byte blocks needed
01h - save video states
02h - restore video states

ECX = states to save/restore:

bit 0 - SVGA hardware state
bit 1 - SVGA BIOS data state
bit 2 - SVGA DAC state
bit 3 - SVGA state

ES:EBX = pointer to save/restore buffer

Out: AL = 4Fh (if function supported by VESA BIOS)
AH = 00h (if function was successful)

Notes:

a) For subfunctions 01h and 02h, the DOS Extender will internally call subfunction 00h to extract the information about size of data that is to be copied.

 


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