Click above to get retro games delivered to your door ever month!
[<<Previous Entry] [^^Up^^] [Next Entry>>] [Menu] [About The Guide]
INT 14h, 06h Raise/lower DTR
Entry: DX Port number
AL DTR state to be set (01h = Raise, 00h = Lower)
Exit: None
This function is used to control the DTR line to the modem. AL = 00h
means lower DTR (disable the modem), and AL = 01h means to raise DTR
(enable the modem). No other function (except Init) should alter DTR.