Epson PX-8 User Manual page 19

software, and on the CP 1M command line, it is the only way to delete a
character.
I
HOME
I:
The L!,!OME
I
key as the name suggests moves the cursor to the top
left hand corner of the virtual screen (not the window).
KEYS
~
TO
I
PF5
I :
The Programmable Function keys
These are a set of keys which enable the user to enter a string of characters
which will be printed when the key is pressed. This is as if they had been typed
in by the user at the keyboard. The PX-8 is programmed with a default set of
characters which allow the most common CP 1M commands to be input with
one keystroke. Also when BASIC is entered, a default set is available, which
corresponds to the common BASIC commands.
The strings are altered by means of the CONFIG program in CP 1M, which
is described in Chapter 3. The BASIC Reference Manual describes how to alter
them in BASIC.
Pressing a programmable function key together with the
I
SHIFT
I
key enters
a different user defined string. The names PF6 to PFIO are given to the shifted
keys
I
PF1
I
to
I
PF5
I ,
i.e. a value of 5 is added to the number of the program-
mable function key if it is shifted.
Since there are ten function key strings it is sometimes difficult to remember
which key has which string associated with it. The strings assigned to each func-
tion key can be displayed on the eighth line of the screen. If the eighth line
shows the following display:
dir Idump
type Isubmit stat Iddt
pip
Iterm~ config~/filink~
Fig. 2.12
This means function key
lliIJ
will print the characters "dir" when pressed,
and "dump" when pressed with the shift held down (i.e. the
I
PF6
I
key is pressed)
and so on across the screen. The "
.J
"character means that the equivalent
of pressing the
I
RETURN
I
key is also added to the characters printed. A
I
RETURN
I
is not added with the characters if it is likely that other commands or parameters
2-16
need to be added.
The assignments can be changed using the CONFIG program described in Chap-
ter 3. This also has an option to switch the display of these function key assign-
ments on and off.
Pressing a programmable function key (
LfITJ
to
I
PF4
I )
together with the
I
CTRL
I
key calls a subroutine specified by the user.
If
no subroutine is speci-
fied, nothing happens.
Pressing the
I
CTRL
I
and
I
PF5
I
keys simultaneously outputs, the contents of the
display screen to the printer.
2-17