System information

CTRL-I Terminates current input (line-feed).
CTRL-M Terminates current input (carriage return).
CTRL-P Copies all subsequent console output to the currently assigned list device
(see Section 1.6.1). Output is sent to the list device and the console device
until the next CTRL-P is pressed.
CTRL-R Retypes current command line; types a clean line following character
deletion with rubouts.
CTRL-S Stops the console output temporarily. Program execution and output
continue when you press any character at the console, for example another
CTRL-S. This feature stops output on high speed consoles, such as CRTs,
in order to view a segment of output before continuing.
CTRL-U Deletes the entire line typed at the console.
CTRL-X Same as CTRL-U.
CTRL-Z Ends input from the console (used in PIP and ED).
rub/del Deletes and echoes the last character typed at the console.
1.4 Built-in Commands CP/M Operating System Manual
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