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Configuration for the H89-17
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Console Conventions
In addition to the standard operating system commands, there are a number of
conventional ASCII control codes you can use for special purposes. For example,
in typing a command, you may accidentally strike the wrong key on your
console. You may use the ASCII DELETE (or RUBOUT) control code to erase the
last character, whilch you may then retype. You may also use the key several
times in succession to back-up more than one space. You may reject an entire line
of keyboard input by striking CTRL-U, as long as you do it before typing a
carriage return. The following list summarizes the HDOS control conventions.
CTRL-C - Halts any ongoing activity by HDOS or a utility program. Control is
retained by whatever program is currently running, but it will stop and await
command from the console.
CTRL-D - Causes an exit from the command mode of a utility program, such as
PIP, back to the end of the HDOS command mode. When copying files, this
signifies an "end-of-transmission" condition, returning you to the current com-
mand mode, whether it is the "main" HDOS command mode, or one of the
utilities.
CTRL-0- Discards output from HDOS and the utilities until the next prompt is
reached.
CTRL-P - Immediately resume output (following a CTRL-0).
CTRL-S - Temporarily halts the output to the console until CTRL-Q is struck.
CTRL-Q - Restarts output to the console (following a CTRL-S).
CTRL-U - Discards the current console input line, allowing you to start over.
CTRL-Z - Cancels any ongoing HDOS activities when struck twice in succes-
sion. Also causes the data in an input file or buffer to be discarded. This code is
generally used in emergency situations to return directly to the HDOS command
mode.
DELETE-Allows you to retype the last character. The system will backspace
over the last character, removing it from the screen.
RUBOUT - Has the same effect as DELETE.
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