APPENDIX J
MACHINE LANGUAGE
MONITOR
INTRODUCTION
Commodore 128 has a built-in machine language monitor which
lets the user write and examine machine language programs
easily. Commodore 128 MONITOR includes a machine language
monitor, a mini-assembler and a disassembler. The built-in
monitor works only in C128 mode; either 40 column or 80
column.
Machine language programs written using Commodore 128
MONITOR can run by themselves or be used as very fast
subroutines for BASIC programs since the Commodore 128
MONITOR has the ability to coexist peacefully with BASIC.
Care must be taken to position the assembly language programs
in memory so the BASIC program does not overwrite them.
To enter the monitor from BASIC, type:
MONITOR HI I HUM
Summary of Commodore 128 Monitor Commands
ASSEMBLE
COMPARE
DISASSEMBLE
FILL
GO
HUNT
JUMP
Assembles a line of 8502 code
Compares two sections of memory and
reports differences
Disassembles a line of 8502 code
Fills a range of memory with the specified
byte
Starts execution at the specified address
Hunts through memory within a specified
range for all occurrances of a set of
bytes
Jumps to the subroutine
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