vt – emulate a VT–100 or VT–220 terminal

vt [ –2abcrx ] [ –f font ] [ –l log ] [ cmd... ]

Vt replaces a rio window with a fresh instance of the program cmd (or the rc(1) shell when omited) running within an emulation of a DEC VT–100 terminal.

change vt to emulate a VT–220, ANSI, or XTerm terminal respectively.
b   changes the color scheme to white text on a black background, but potentially with colors from escape sequences.
c   changes the color scheme to monochrome (no colors).
f   sets the font.
l   names a log file for the session.
r   start in raw mode.

The right button has a menu with the following entries to provide the sort of character processing expected by non–Plan 9 systems:
24x80    Resize the vt window to hold 24 rows of 80 columns.
crnl     Print a newline (linefeed) character after receiving a carriage return from the host.
cr       Do not print a newline after carriage return.
nlcr     Print a carriage return after receiving a newline from the host.
nl       Do not print a carriage return after newline.
raw      Enter raw (no echo, no interpretation) character mode for input.
cooked   Leave raw mode.
Toggle block selection for mode for rio snarf buffer.
exit     Exit vt.

The middle button has a menu with the following entries:
backup      Move the display back one screenful.
forward     Move the display forward one screenful. (These are a poor substitute for a scroll bar.)
reset       Display the last screenful; the same as going forward to the end.
paste       Pastes the contents of the rio snarf buffer, just as paste in the rio menu.
snarf       Copy selection to the rio snarf buffer.
plumb       Send selection to the plumber.
scroll      Make new lines visible as they appear at the bottom.
page        When the page fills, pause and wait for a character to be typed before proceeding. The down arrow key advances a page without sending the character to the host.


This program is used only for communicating with foreign systems, so it is not as rich an emulation as its equivalent in other environments.

Use care in setting raw and newline modes when connecting to Unix systems via con(1). It may also be necessary to set the emulator into raw mode.