Int 10/AX=4F10h/BL=01h

AX = 4F10h
BL = 01h
BH = new state (see #00111)

Return:
AL = 4Fh if function supported
AH = call status
00h successful
else failed

See Also: AX=4F10h/BL=00h - AX=4F10h/BL=02h - AX=A00Ch



(Table 00111)
Values for VESA VBE/PM power state:
00h    On
01h    standby
02h    suspend
04h    Off
08h    reduced On (for flat screens)