First post, by videogamer555
What's the difference between the Modem and Null Modem modes in DOSBox? With real hardware, a null modem cable is one where the DataTX pin on each end is connected to the DataRX pin on the opposite end (which differs from a normal serial cable where the TX on one end is connected to TX on the other, and RX on one end is connected to RX on the other). However, with DOSBox, there are no physical pins to connect. So how does the Null Modem mode differ from the Modem mode?
And on a somewhat related topic, how do you use the non-data serial pins (CD, RI, DTR, DSR, CTS, RTS) when emulating serial communications in DOSBox (using modes Null Modem or Modem, rather than using the directserial mode)? Or does DOSBox simply not emulate these pins?
CD = Carrier Detect
RI = Ring Indicator
DTR = Data Terminal Ready
DSR = Data Set Ready
CTS = Clear To Send
RTS = Ready To Send