Olympia People, Руководство пользователя

Страница: 53 / 137

Special Functions
of the Keyboard
Under CP/M-86
As you learned in the explanation
of the keyboard, certain keys are
reserved as function and control
keys. Their meanings change
according to the program being
run on the
PEOPLE Personal
Microcomputer. Following is a
brief explanation of the functions
those keys perform when you are
working with CP/M-86.
[RETURN] Key
After depressing the [RETURN]
key, the prompt appears on the
screen as a response. The
[RETURN] key inputs commands
to the computer as you’ve seen
in the previous exercises. There
are, however, some exceptions
whereby an input is not termi­
nated with the [RETURN] key; for
example, when sending control
characters (simultaneously
depressing the CTRL key with
another key).
Input of Control
Characters With the
CTRL Key
Holding down the CONTROL
(CTRL) key assigns a special
function to the other key you
press. You are already familiar
with entering commands with the
control key from the preceding
example of a warm boot or start.
The CTRL key must be held
down while you enter a control
character. Holding down both
keys is represented in this
description in abbreviated form
as “ CTRL-C” , whereby the
control character could be any
key.
CTRL-E
The cursor jumps to the begin­
ning of the next command line
without executing the command.
The previous command input
remains intact and the input can
continue. This command inputs
longer command lines than is
allowed by the screen display.
CTRL-H
Sets the cursor one position back
and deletes the character input at
this position. Same function as
“ Backspace” .
CTRL-1
The cursor jumps to the next tab
position (tab spacing is 8 posi­
tions). Therefore this has the
same function as the TAB key.
CTRL-J
Same function as [RETURN] key
with line feed.
CTRL-M
Same function as CTRL-J or
[RETURN] key but on same line
without line feed. Identical to an
[EXPRESS] key on the typewriter.
CTRL-P
A parallel connection occurs
between the display and the
printer. All characters appearing
on the screen are immediately
sent to the printer after releasing
the [RETURN] key. Reinputting
CTRL-P will disconnect the paral­
lel operation of the printer and
the display.
CTRL-R
Sets a double dagger at the end
of an instruction input and
repeats that entire input on the
following line.
CTRL-S
Stops the listing of information on
the display until
CTRL-S is
reinput.
CTRL-U
Sets a double dagger in the
cursor position and cancels out
all previous input in this
command line. The line display
remains intact, however. The
command input for this line is
continued in the next line.
CTRL-X
Same function as C key (red
correction key).
For completeness, all CTRL
inputs running under CP/M-86
were listed, as well as those
which have the same function as
other control keys. The
Standard
CP/M Control Characters were
created to make it possible for a
user, who changes from another
system to PEOPLE, to have the
command inputs he or she is
already used to.
CTRL-PRINT
If the PRINT key is depressed
when the CTRL key is held down,
a FORM FEED occurs following
the print out. (The next page is
advanced.)
5/10