Exmon is an extended machine code monitor offering full debugging facilities and assembler interaction. It provides more than 35 new commands all executed in machine code.
If you are interested in using the assembler as a beginner or an experienced user, or would just like to have facilities like Disassemble, Move Memory, Verify, etc, instantly at your fingertips, then Exmon is about the best you can buy.
Exmon's features include:
Find ASCII string
Find string of hex bytes
Enter ASCII string
Move memory block
Verify that two blocks are the same
Relocate code to run at another location
Fill block of memory with given byte
Execute all * commands (e.g. *FX calls)
Breakpoint insertion for debugging
Special OSBYTE and OSWORD calls
Single-step facility with continuous register display and alteration
Your Computer (August 1983) reviewed Exmon as follows: "Beebug's Exmon is an exceptionally comprehensive machine code monitor... Exmon would be hard to improve upon. It manages to provide all the facilities you are likely to need in developing and testing machine code."