The value shown against the semi-colon
on
the fifth line
is
the current setting
in minutes for the auto power
off
time. This
is
the time for which the PX-8
will wait before switching itself
off
in continue mode
if
no key
is
pressed.
It
is
advisable to keep the time short, otherwise the battery will
run
down. The
reason for having such a system
is
to conserve the battery.
As can be seen from the display, the time can be set in intervals
of
one minute
(up to
255
minutes)
or
switched
off
altogether using the value
O.
When you
have entered the time you require, press RETURN. The chosen time will be
displayed
on
the fifth line, and you can use the ESC key to return to the main
CONFIG menu.
2. The
CP
1M
FUNCTION
KEY ASSIGNMENTS
When the 2 key
is
pressed
on
the main CONFIG menu, the display changes to:
***
CP/M FUNCTION
KEY
***
Select
function
key
number
(PF10=0)
or
ESC
to
return.
PFI
dir
PF2
type
PF3
stat
PF4
pip
PF5
conf
i
g·
....
M
PF6
dump
PF7
submit
PFB
ddt
PF9
term··'M
PF10
filin~c"M
These are the strings assigned to the programmable function keys
on
the top
of
the keyboard. A description
of
the use
of
the keys
is
given in Chapter 2 sec-
tion 2.2.1c. The screen above shows the default setting, i.e. the strings which
will be assigned when the system
is
initialized
or
a reset
is
performed.
Note that when shown
on
the eighth line
of
the
CP/M
screen, some
of
the strings
terminate in the
--1
character. In setting them up with the CONFIG program,
this carriage return
is
shown as
"J\M".
These strings have a carriage return
(CTRL-M) added to them because there
is
no possibility
that
any more charac-
ters need to be typed after the string.
For
example the PF5 key can be used
to run the CONFIG program as follows. On the
CP/M
command line type the
drive name where the CONFIG program
is
located (e.g. C:) and then press the
PF5 key. All the letters
of
the word CONFIG
will
appear, and the carriage return
will be 'typed' also.
In
a
few
seconds the
CONFIG
main menu will appear
on
the screen.
The CTRL-M
is
not
added to all commands since some
of
them might possibly
require extending.
For
example with
DIR
you might want to add the name
of
3-62
a drive other
than
the current one to find
out
the files
on
that
particular drive
instead
of
changing the logged in drive first. When the
~key
is
pressed, the
letters
"DIR"
are printed, and the PX-8 will wait for any further input.
If
you
simply press the
I
RETURN
I key, the directory
of
the current drive will be print-
ed.
If
you press the space bar and then the two keys
"C:"
followed by the
I
RETURN
I key, the directory
of
the C: drive will be printed
on
the screen.
To
change the assigned string, press the number corresponding to the
PF
key
(i.e. 1 for
PFl,
2 for PF2 etc, remembering
that
0
is
used for PFI0). The se-
cond line
of
the screen will display the message:
Terminate function key string with
HELP
and the third line
of
the screen will then display the name
of
the key whose
function
is
to
be changed, with the cursor
to
the right
of
it awaiting input.
Up
to
15
characters can be inserted into each
PF
string.
If
a control key
is
to be
added, e.g. a carriage return (CTRL-M), this MUST be added by pressing the
I CfRL I and the appropriate alphabetic key. However, in the special case
of
the
carriage return simply pressing the
I
RETURN
I key will add the characters
"J\M"
to denote the CTRL-M for the carriage return. This counts as one character
of
the string, although it
is
displayed as two (
"J\"
and
"M")
in this section
of
the
CONFIG
program.
If
a control character has been added correctly, the
backspace (
~)
key will remove it as a pair
if
the
[]§J
key
is
pressed once.
When a carriage return
is
inserted correctly it will be seen
on
the function key
display line as a
..-J
character.
If
the characters
"J\M"
appear
on
the function
key display line, they are represented as those characters and DO NOT
REPRESENT A CARRIAGE RETURN.
For
example
if
the function key dis-
play line shows
"DIRJ\M"
for one
of
the keys when the corresponding key
is
pressed, all five characters will be displayed and the cursor will be placed
at
the right
of
the last one awaiting further input.
Although the string can consist
of
up
to
15
characters,
if
more
than
seven are
assigned
to
the string, only the first seven will be seen
on
the function key dis-
play line. However,
if
the function key
is
pressed the complete number
of
charac-
ters will be printed to the screen.
If
a wrong character
is
input, the backspace key (
~
) can be used
to
erase
the previous character.
Because the
I
RETURN
I key can be use to enter the carriage return as a
"J\M",
the I
HELP
I key
is
used to terminate the string. The I
ESC
I key
is
used to return
to
the CONFIG main menu.
3-63
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