Radio Shack TRS-80 Owner's Manual page 87

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1
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HERZSO
Set
Up
for
50
Hz
AC
power (non-USA
users)
DO HERZ&O
starts
the
utility to
change
the
system
for
50 Hz operation hpusg
is
a sjo-
This
utility
is
provided
for
customers
in
areas
where
the
AC power
is
50
rather
than
60
Hz.
It
should not be used
by any other customers,
herzso simply
places
a
patch
on
the diskette that
changes
the
clock speed
for
50
Hz
users.
herzso
is
a DO-file that
makes
a
change
in the
software of
trsdos.
Only
the
Drive
diskette
is
changed.
Be
sure
it
is
write-enabled before
you
start the
De-
file.
Once
the
herzso change
is
done,
it
will
remain
in
effect for that diskette.
To perform
the
change,
type:
DO
HERZ50
Once
the
change has been
made, you
will
need
to
reset the
system
to
put
the
change
into effect.
This loads
the
new
software
into
ram.
LPC
Line Printer
Control
tPC
The lpc
utility
program
allows
trsdos
to
ignore multiple carriage return
commands.
Without lpc,
a
top-of-form (LPRINTCHR$(12))
command
will
add an
extra carriage return/line feed
each time
it
is
executed. Also,
lpc
masks
the
high
bit
of each data byte, allowing
you
to
send certain intercepted
codes
to the
printer.
For
instance, the
basic statement lprintchr$(140)
will
send code 140-
128
=
12
(LPRiNT chr$(12»
to
the Printer.
71