term% cat index.txt C56(9.1) C56(9.1)
NAME
c56 - terminal program with data compression
SYNOPSIS
c56
DESCRIPTION
C56 replaces the program in the layer on its standard output with an
emulator for a Teletype DMD 5620 stand-alone terminal. In the result‐
ing layer, environment variable TERM is set appropriately. The charac‐
ter stream from the host to the terminal is compressed using an adap‐
tive algorithm that often doubles the effective data rate of a slow
host-terminal connection.
This terminal program is most useful at speeds of 2400 baud and below.
At 9600 baud, the terminal cannot generate characters and put them on
the screen fast enough to keep up, and the extra overhead introduced by
decompression just slows things down.
BUGS
Unexported shell parameters and functions are lost.
Race conditions occasionally leave the tty modes set improperly at
start-up.
C56(9.1)