Int 2F/AX=7F09h

AX = 7F09h
DH = new state (00h off, 01h on)

Return:
AX = status
0000h successful

See Also: AX=7F00h"PRINDIR" - AX=7F07h"PRINDIR" - AX=7F08h - Category: Printer Enhancements - Int 2Fh - P