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Summary of Apple II Monitor Commands
Examining Memory.
- {adrs}
Examines the value contained in one location.
- {adrs1}.{adrs2}
Displays the values contained in all locations
between {adrs1} and {adrs2}.
- [RETURN]
Displays the values in up to eight locations
following the last opened location.
Changing the Contents of Memory.
- {adrs}:{val} {val} ...
Stores the values in consecutive memory locations
starting at {adrs}.
- :{val} {val}
Stores values in memory starting at the next
changeable location.
Moving and Comparing.
- {dest}<{start}.{end}M
Copies the values in the range {start}.{end} into
the range beginning at {dest}. (M=move)
- {dest}<{start}.{end}V
Compares the values in the range {start}.{end}
to those in the range beginning at {dest}.
(V=verify)
Saving and Loading via Cassette Tape.
- {start}.{end}W
Writes the values in the memory range {start}.{end}
onto tape, preceded by a ten-second leader.
- {start}.{end}R
Reads values from tape, storing them in memory
beginning at {start} and stopping at {end}.
Prints "ERR" if an error occurs.
Running and Listing Programs.
- {adrs}G
Transfers control to the machine language program
beginning at {adrs}. (G=go)
- {adrs}L
Disassembles and displays 20 instructions, starting
at {adrs}. Subsequent L's will display 20 more
instructions each. (L=list)
Miscellaneous.
- {adrs}S
Disassemble, display, and execute the instruction
at {adrs}, and display the contents of the 6502's
internal registers. Subsequent S's will display
and execute successive instructions. (S=step)
- {adrs}T
Step infinitely. The TRACE command stops only
when it executes a BRK instruction or when you
press RESET. (T=trace)
- Contrl-E
Displays the contents of the 6502's registers.
(E=examine)
- I
Set Inverse display mode.
- N
Set Normal display mode. Also useful as a delimiter
for putting multiple commands on one line.
- Control-B
Enter the language currently installed in the
Apple's ROM (cold start at $E000).
- Control-C
Reenter the language currently installed in the
Apple's ROM (warm start at $E003).
- {val1}+{val2}
Add the two values and print the result.
- {val2}-{val1}
Subtract the second value from the first and
print the result.
- {slot} Control-P
Divert output to the device whose interface
card in in slot number {slot}. If {slot}=0,
then route output to the Apple's screen.
- {slot} Control-K
Accept input from the device whose interface
card is in slot number {slot}. If {slot}=0,
then accept input from the Apple's keyboard.
- Control-Y
Jump to the machine language subroutine at
location $03F8. This lets you add your own
commands to the Monitor.
The Mini-Assembler.
- F666G
Invoke the Mini-Assembler.
- ${command}
Execute a Monitor command from the
Mini-Assembler.
- FF69G
Leave the Mini-Assembler.