Compatibility: Win 3.x
Expect: AX    4006H
Return: none
Info: VM-aware applications which have used INT 2fH 4000H (enable VM-
assisted video save/restore) can intercept this fn and take
whatever action is needed to restore the state of the video
registers to what it was at the time of the previous
INT 2fH 4006H (save vid regs) call.

Before calling this, the VDD restores the registers to what they
were at the time of the original INT 2fH 4000H call; thus the
application need only modify video registers which differ from
their earlier settings.

- -

INT 2fH 4006H: Restore Video Register State