Int 10 Fn 5F03 - Chips & Technologies Extended BIOS - Set Power-on Emula [V] AX = 5F03h BL = 01h CL = emulation mode CH = mode bit 7 persistence (0 reset on next boot, 1 until changed) Return: AL = 5Fh if function supported AH = status 00h unsuccessful 01h successful See Also: AX=5F02h,AX=5F03h/BL=00h,AX=5F90h