dterm For Linux

dterm application is a simple terminal emulator, which doesn't actually emulate any particular terminal. Mainly, it is designed for use with xterm and friends, which already do a perfectly good emulation, and therefore don't need any special help; dterm simply provides a means by which keystrokes are forwarded to the serial line, and data forwarded from the serial line appears on the terminal.

dterm is invoked thusly: dterm [options|device ...]

dterm attempts to read the file ~/.dtermrc for options; if this doesn't exist, it tries /etc/dtermrc. Then it parses the options passed on the command line.

The options read should include a device name, e.g "ttyS0" or "ttyd0" for the first serial port on a Linux or FreeBSD system respectively.

Once started, dterm can be got into command mode using Ctrl/]. Press enter once from command mode to get back into conversational mode. (The command character can be changed with the esc= option, e.g. esc=p to use Ctrl/P instead of Ctrl/].)

The following options can be used from command mode

300, 1200, 9600 etc: Set speed, default 9600. 5, 6, 7, 8: Set bits per character, default 8. 1, 2: Set number of stop bits, default 1. e, o, n, m, s: Set parity to even, odd, none, mark or space, default none. cts, nocts: Enable / disable CTS flow control, default nocts. xon, noxon: Enable / disable XON/XOFF flow control, default noxon. modem: Enable / disable modem control (hang up modem on exit, exit if modem hangs up), default nomodem. bs, nobs: Enable / disable mapping of Delete to Backspace, default nobs. del, nodel: Enable / disable mapping of Backspace to Delete, default nodel. maplf, nomaplf: Enable / disable mapping of LF to CR, default nomaplf. igncr, noigncr: Ignore / output carriage returns, default noigncr. crlf, nocrlf: Enable / disable sending LF after each CR, default nocrlf. b: Send a 500 ms break. dtr, nodtr: Raise / lower DTR, default dtr. rts, norts: Raise / lower RTS, default rts. d, r: Toggle DTR / RTS. esc=: Set command mode character to Ctrl/ (default ']') @: Read and process configuration from . !: Execute shell command show: Display current configuration and modem status. help, h, ?: Display a summary of commands. version: Display version, copyright and warranty information. quit, q: Exit

Connect via ttyS1 to a system running at 2400 bps, 7 bits even parity:

dterm ttyS1 2400 7 e

Send a break in a running session:

^] dterm> b dterm>