MFJ-1270C/1274C MANUAL ADVANCED OPERATION
Page 59
Transparent Mode by setting TRFLOW ON. Note that the mode is no longer
truly transparent when these features are enabled.
Hardware Flow Control
Hardware flow control is less likely to depend on the programming of a partic-
ular communications program. DTR and CTS are normally used for flow
control signals in Transparent Mode. The command XFLOW OFF enables
hardware flow control in Converse Mode and Command Mode. Your computer
may receive as many as 2 characters after it signals the MFJ TNC to stop
sending, since some characters may already be "in route" through serial I/O
chips. Refer to Chapter 7, Hardware for details on the interface required for
hardware flow control.
Type-in Flow Control
Type-in flow control, enabled with the command FLOW, is really a display
feature. It can keep the MFJ TNC from interrupting you with incoming packets
when you are in the middle of typing a command line or an outgoing packet. As
soon as you type the first character of a line, the MFJ TNC will put
a "hold" on all output (except for echoing your input). The "hold" remains
ineffect until you type a <CR> to end the command line, or a send-packet
character to mark the end of a packet, or until you erase or re-display the line
you have started.
Some computers have difficulty simultaneously sending and receiving characters
over the serial port. This is most commonly the case for computers with
"software UARTs." Type-in flow control will improve the operation of such
computers with the MFJ TNC.
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