DisAssem Monitor Disassembly Programs - Monitor, MonXXX
        =======================================================
        J.G.Harston, 70 Camm Street, Walkley, Sheffield, S6 3TR
                          jgh@arcade.demon.co.uk

                   Core Version 2.00 - Date: 16-Mar-2007

Monitor allows you to disassemble machine code for a variety of processors
using the disassembly routines in the DisAssem ROM. Mon09, Mon32, Mon65,
MonPDP and MonZ80 disassemble the 6809, 32000, 6502, PDP-11 and Z80.

When running in a 40-column screen mode, the disassembly is shown at the
top of the screen, with a summary the instructions at the bottom. In an
80-column screen mode, the disassembly is shown at the left, with the
instructions at the right.

The following keys are recognised:

 0-9, A-F: Enter bytes. Up to 16 bytes can be entered as a single string of
	digits.
 G: Get to buffer. The specified file will be loaded into the code buffer.
 L: List disassembly. The specified code is disassembled
 M: Set memory address. The display listing is changed to start at the
	specified address.
 N: Display named labels. This cycles through four options for displaying
	MOS entry points at &FFxx. It cycles through "&FFxx", "OSxxxx",
	"&FFxx :\ OSxxxx" and "OSxxxx :\ &FFxx".
 O: Set code origin. This sets the address that will be interpreted as
	address &0000 for disassembly. If the entered address is prefixed
	by '=', then the currently displayed memory address is recalculated
	to be the specified address. Otherwise, the entered address is used
	as the origin address.
 P: Put from buffer. The code buffer is saved, using the length entered.
 Q: Dump bytes/List disassembly. The display can be toggled between
	disassembly and hex/ascii dump. When in dump display mode, pressing
	+ and - will move the memory address by 128 byte, instead of 8.
 R: ROM number. If the program is running in the I/O processor, you can
	disassemble from a specific sideways ROM or RAM bank. You can also
	enter the address directly as &FFFrxxxx.
 S: Set Screen mode. If there is sufficient memory, the entered mode will
	be switched to.
 T: Enter text string. The entered text string of up to 32 characters is
	entered straight into memory.
 W: Set address width. This cycles through an address width of 4 to 8
	bytes.
 X: eXit. This terminates the program.
 Y: Enter bit7-terminated text string. The entered text string of up to 32
	characters is entered into memory with bit 7 of the final character
	set.
 Z: Set CPU. If the program can disassemble more than one processor, this
	allows you to select one. If disassembly routines for the selected
	processor do not exist, you are prompted to re-enter until a valid
	number is entered. If the disassembly subroutines specify an
	address with, this will be changed to suit.
 *: Enter *commands. At this prompt *commands can be entered. Press RETURN
	to finish.

 + -		: Advance or go back by 8 bytes, or 128 bytes in dump mode
 RETURN DELETE	: Advance or go back by 1 byte
 SPACE		: Advance past a single opcode

Hints
-----
You can create a file containing a disassembly listing by spooling output
to a file with *Spool. Enter *Spool <filename>, then use (L)ist to list the
disassembly. When finished, do *Spool with no filename. The outputted file
will only have the disassembly listing, the other Monitor menu and other
displays are not spooled.

Version History
---------------
v2.00 Main monitor core completely rewritten.
v1.43 ...
 :
v1.00 About 1985 Original MonZ80 program