<refentry id="debug">
<refnamediv>
<refname>DEBUG</refname>
<refpurpose>Interactive Debugger</refpurpose>
</refnamediv>

<refsynopsisdiv>
<cmdsynopsis>
<command>DEBUG</command>
</cmdsynopsis>
</refsynopsisdiv>

<refsect1><title>Description</title>
<para>
Interactive Debugger.
</para>
<para>
Command Summary:
[SPACEBAR]expression
Evaluate; display in hexadecimal and decimal form

.
Display dot address and contents

..
Restore last dot address; display address and contents

.expression
set dot to result of expression; display address and contents

=expressoin
Set memory at dot to result of expression

-
Decrement dot; display address and contents

[ENTER]
Increment dot; display address and contents

:
Display all registers' contents

:register
Display the specified register's contents

:register expression
Set register to the result of expression

E module-name
Prepare for execution

G
Go to the program

G expression
Goto the program at the address specified by the result of expression

L module-name
Link to the module named; display address

B
Display all breakpoints

B expression
Set a breakpoint at the result of the expression

K
Kill all breakpoints

K expression
Kill the breakpoint at address specified by expression

M expression1 expression2
Display memory dump in tabular form

C expression1 expression2
Clear and test memory

S expression1 expression2
Search memory for pattern

$ command
Call OS-9 shell with optional command

Q
Quit (exit) Debug
</refsect1>
</refentry>