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-revision 1.2 by cebix,
Mon Oct  4 19:40:36 1999 UTC
+revision 1.10 by cebix,
Wed Oct 18 13:42:55 2000 UTC
 Line 1
-         mon, Version 2.2
+   cxmon, Version 3.0
-         A command-driven file monitor
+   A command-line file manipulation tool and disassembler
-         Copyright (C) 1997-1999 Christian Bauer, Marc Hellwig
+   Copyright (C) 1997-2000 Christian Bauer, Marc Hellwig
-         Freely distributable
+   GNU binutils disassemblers Copyright (C) 1988, 89, 91, 93, 94, 95, 96, 97, 1998
+     Free Software Foundation, Inc.
  License
  -------
- mon is available under the terms of the GNU General Public License. See the
+ cxmon is available under the terms of the GNU General Public License. See the
  file "COPYING" that is included in the distribution for details.
  Overview
  --------
- "mon" is an interactive command-driven file manipulation tool that is inspired
+ cxmon is an interactive command-driven file manipulation tool that is
- by the "Amiga Monitor" by Timo Rossi <trossi@jyu.fi>. It has commands and
+ inspired by the "Amiga Monitor" by Timo Rossi. It has commands and features
- features similar to a machine code monitor/debugger, but it is not intended
+ similar to a machine code monitor/debugger, but it lacks any functions for
- to be used for debugging. It doesn't operate on physical or virtual RAM
+ running/tracing code. There are, however, built-in PowerPC, 680x0, 80x86,
- locations of a process but rather on a fixed-size (but adjustable) buffer with
+and Z80 disassemblers and special support for disassembling MacOS code.
- adresses starting at 0. Also, there are no commands to trace code, set
+ By default, cxmon operates on a fixed-size (but adjustable) memory buffer
- breakpoints etc. There are, however, built-in PowerPC, 680x0, 6502 and 8080
+ with adresses starting at 0.
- disassemblers.
  Installation
 Line 35 
 Please consult the file "INSTALL" for in
  Usage
  -----
- mon can be started from the Shell or from the Tracker (BeOS), but command line
+ cxmon can be started from the Shell or from the Tracker (BeOS), but command
- history doesn't work when started from the Tracker). If you give no command
+ line history doesn't work when started from the Tracker.
- line arguments, mon enters interactive mode. Otherwise, all arguments are
- interpreted and executed as mon commands. The default buffer size is 1MB.
+ Options:
- The mon command prompt looks like this:
+   -m  enables symbolic MacOS A-Trap and low memory globals display in the
+x0 disassembler
+   -r  makes cxmon operate in real (virtual) memory space instead of an
+       allocated buffer
+ If no additional command line arguments are given, cxmon enters interactive
+ mode. Otherwise, all remaining arguments are interpreted and executed as cxmon
+ commands.
+ The default buffer size is 1MB.
+ The cxmon command prompt looks like this:
    [00000000]->
-Line 49 
 section on expressions). You can get a s
+Line 60 
 section on expressions). You can get a s
  Commands that create a longer output can be interrupted with Ctrl-C.
- To quit mon, enter the command "x".
+ To quit cxmon, enter the command "x".
  Constants, variables and expressions
-Line 65 
 values. A variable is referred to by its
+Line 76 
 values. A variable is referred to by its
  combinations of digits and letters (they may also start with a digit) that
  are not also valid hexadecimal numbers. Names are case-sensitive.
- mon accepts expressions in all places where you have to specify a number. The
+ cxmon accepts expressions in all places where you have to specify a number.
- following operators are available and have the same meaning and precedence as
+ The following operators are available and have the same meaning and
- in the C programming language:
+ precedence as in the C programming language:
    ~   complement
    +   unary plus
-Line 107 
 values and ASCII strings separated by co
+Line 118 
 values and ASCII strings separated by co
  The buffer
  ----------
- Those mon commands that operate on "memory" operate on a buffer allocated by
+ Those cxmon commands that operate on "memory" operate on a buffer allocated
- mon whose size is adjustable with the "@" command. The default buffer size is
+ by cxmon whose size is adjustable with the "@" command. The default buffer
-MB. The buffer is an array of bytes where each byte has a 32-bit integer
+ size is 1MB. The buffer is an array of bytes where each byte has a 32-bit
- address. Addresses start at 0 and are taken modulo the buffer size (i.e. for
+ integer address. Addresses start at 0 and are taken modulo the buffer size
- the default 1MB buffer, addresses 0 and 100000 refer to the same byte).
+ (i.e. for the default 1MB buffer, addresses 0 and 100000 refer to the same
+ byte).
- The buffer is the working area of mon where you load files into, manipulate
+ The buffer is the working area of cxmon where you load files into, manipulate
  them, and write files back from. Arbitraty portions of the buffer may be used
  as scratch space.
-Line 121 
 as scratch space.
+Line 133 
 as scratch space.
  Commands
  --------
- The following commands are available in mon ('[]' marks a parameter than can be
+ The following commands are available in cxmon ('[]' marks a parameter than
- left out):
+ can be left out):
-   x                        Quit mon
+   x                        Quit cxmon
- quits mon and returns to the shell.
+ quits cxmon and returns to the shell.
    h                        Show help text
-Line 142 
 displays a short list of available comma
+Line 154 
 displays a short list of available comma
    ver                      Show version
- shows the version number of mon.
+ shows the version number of cxmon.
    ? expression             Calculate expression
-Line 166 
 characters. Entering "i" without argumen
+Line 178 
 characters. Entering "i" without argumen
  of "." is set to the address after the last address displayed.
+   b [start [end]]          Binary memory dump
+ displays the buffer contents from address "start" to address "end" in a binary
+ format. Entering "b" without arguments is equivalent to "b .". The value of
+ "." is set to the address after the last address displayed.
    m [start [end]]          Hex/ASCII memory dump
  displays the buffer contents from address "start" to address "end" as hex
-Line 194 
 Entering "d68" without arguments is equi
+Line 213 
 Entering "d68" without arguments is equi
  "." is set to the address after the last address displayed.
-   d80 [start [end]]          Disassemble 8080 code
+   d80 [start [end]]        Disassemble Z80 code
  disassembles the buffer contents from address "start" to address "end".
  Entering "d80" without arguments is equivalent to "d80 .". The value of
  "." is set to the address after the last address displayed.
-   d86 [start [end]]          Disassemble 80x86 code (very incomplete)
+   d86 [start [end]]        Disassemble 80x86 (32-bit) code
  disassembles the buffer contents from address "start" to address "end".
  Entering "d86" without arguments is equivalent to "d86 .". The value of
  "." is set to the address after the last address displayed.
+   d8086 [start [end]]      Disassemble 80x86 (16-bit) code
+ disassembles the buffer contents from address "start" to address "end".
+ Entering "d8086" without arguments is equivalent to "d8086 .". The value
+ of "." is set to the address after the last address displayed.
    : start string           Modify memory
  puts the specified byte string at the address "start" into the buffer. The
-Line 323 
 is omitted, the variable "var" is cleare
+Line 349 
 is omitted, the variable "var" is cleare
  clears all currently defined variables.
- rmon
- ----
- When mon is started as "rmon", it enters "real mode". That is, all memory
- related functions no longer operate on the buffer but on "real" (virtual)
- memory. Unless you are writing Mac emulators, this is probably of not much
- use. :-)
  Examples
  --------
- Here are some simple examples for what is possible with mon.
+ Here are some simple examples for what is possible with cxmon.
  Join "file1" and "file2" to "file3":
-Line 348 
 Remove the first 24 bytes (e.g. an unnee
+Line 365 
 Remove the first 24 bytes (e.g. an unnee
    [ 0 "file"
    ] 18 .-18 "file"
- Load the mon executable and search for PowerPC "nop" commands:
+ Load the cxmon executable and search for PowerPC "nop" commands:
-   [ 0 "mon"
+   [ 0 "cxmon"
    h 0 . 60,00,00,00
- Create a modified version of mon so that the prompt has " $" instead of "->":
+ Create a modified version of cxmon so that the prompt has " $" instead of
+ "->":
-   [ 0 "mon"
+   [ 0 "cxmon"
    set size=.
    h 0 . "->"
    : . " $"
-   ] 0 size "mon1"
+   ] 0 size "cxmon1"
  Convert a binary file which contains 16-bit numbers in little-endian format
  to big-endian format (or vice-versa):
-Line 374 
 Load a BeBox boot ROM image and start di
+Line 392 
 Load a BeBox boot ROM image and start di
    d 100
+ Using cxmon in your own programs
+ --------------------------------
+ cxmon provides a simple interface for integration in other programs. It can,
+ for example, be used as a monitor/debugger for an emulator (it is used in
+ Basilisk II in this way).
+ Here's how to do it (all functions are defined in the mon.h header file):
+. Link all the cxmon object files, except main.o, to your program.
+. In your program, call mon_init() before using any other cxmon functions.
+. After calling mon_init(), set the mon_read_byte and mon_write_byte
+     function pointers to the routines used for accessing memory.
+. You can use mon_add_command() to add new commands to cxmon by specifying
+     the command name, function and help text. From within your command
+     function, you can use mon_get_token() and mon_expression() to parse the
+     arguments and the mon_read/write_*() functions to access memory.
+. To enter cxmon, call the mon() function like this:
+       char *args[3] = {"mon", "-r", NULL};
+       mon(2, args);
+. If you're done with cxmon, call mon_exit().
  History
  -------

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