Radio Shack TRS-80 model III Owner's Manual page 45

TRS-8Q
MODEL
III
DISK SYSTEM
Its features include:
•
Full- or half-screen displays
of
memory
contents
•
Commands
for modifications
to
ram
and
register
contents
•
Single-step
execution of
programs
•
Breakpoint
interruption
of
program
execution
•
Transfer
of
control (Jump)
•
"Editing"
of
disk-files
debug
uses
the
memory
area from
xmeoo'
to
x*54FF
(see
trsdos
Memory
Map), debug
can only be used on programs
in
the user area
x^w
to
top.
Examples
DEBUG
Turns
debug
on.
Press
®
to quit
debugging and
return
to
trsdos.
Turns
debug
off.
Command
Description
Debug
commands
are
usually entered by
pressing
a single key. In
most
cases,
you do
not
have
to
press
(INTER) after the
command
has been typed
in.
Either'
a
prompt
will
immediately be
displayed
or
debug
will
execute
the operation
without
further instruction.
In
some
cases, you
will
have
to enter
a specific hexadecimal
value or address
(see r and
j
commands,
for instance).
Instead of pressing
(ENTER) after the
address
is
typed
in,
you
will
have
to press (SPACEBAR)
.
Once you
have
entered
the
debug
program,
you
may
use any
of
the following
special
commands:
D
(Display
Memory
Contents)
Press
®
to
display
the
contents of memory, trsdos
will
respond with
the
prompt:
D
ADDRESS
-
You
should type
in the hexadecimal
address of
the
memory
location
you
wish
to see.
The
display
will
be
either
half- or
full-screen, depending on
the
format
you
are
currently
using
(see below).
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