INT 2F U - Windows95 - PATCH ??? AX = 4A32h BL = subfunction 00h get ??? Return: AX = flag: subfunction 04h has been used (0000h/FFFFh) DX = ??? (0000h/?) 01h patch ??? in IO.SYS (segment 0070h) 02h unpatch ??? in IO.SYS 03h ??? 04h set ???, then do subfunction 01h 05h unset ???, then do subfunction 02h else Return: nothing