Radio Shack TRS-80 model III Owner's Manual page 39

TRS-80
MODEL
Hi
DISK
SYSTEM
CLEAR
Clear
User
Memory
\^i^fMmim^^^M^
start clearing
user memory, aaaa
is a
fdur-drgit hexadecimal number
from
6000
to
the end
of
user
memory.
If
this option
Is
omitted,
eooo
is
used.
If
this option
Is
used, end
==
bbbb must
also
he
used.
end
=
bbbb
tells
trsdos
to
clear user memory
to a specified end.
bbbb
*
s
a
feuMigif hexadecimal
number
no
less than
the start
number
ano'
no
gfeater than the top
of
memory.
If
this
option
is
used, start
=
aaaa must
also be
used.
mem
=
ccce
sets the
memory
protect address, cccc
is
a
four-digit
hexadecimal
number
from
0000 to
ffff.
If
this option
is
omitted,
the
memory
protect address
is
reset
to
end
of
user ram.
If all
options are omitted,
all available
ram
is
cleared, memory-
protect
is
reset
to
end
of
memory,
the Display
is
cleared,
all
1/0
drivers are reset (see Memory
Requirements
of trsdos).
This
command
gets you
off
to a
fresh
start.
Depending on
the
options
you
select, this
command
will:
•
Zero
user
memory
(load binary zero
into
each
memory
address above 6000)
•
Clear
the
Display
•
Un-protect
all
memory
See
Memory
Requirements
of trsdos
for
more
information on
the
memory-
protect address.
Note: clear
cannot be used
in
a
do
file.
Example
CLEAR (START=9000,END=0A000)
Note: Hexadecimal numbers which
begin with
a
letter
must
be prefaced by
zero
(see
above
example).
CLEAR (MEM=7000)
32