Monst.prg is a m68k-monitor program for Atari ST. It is able to show memory contents in hex and ASCII code or to disassemble programs. Additionally it contains a complete 68000-line-by-line assembler. Please consult the source code for all implemented commands (monst.asm). Unfortunately it does not work under the advanced Atari TT-generation (as far as I know). README.TXT contains a short list of the most important commands (NEW!). All code has been assembled with the GST 68000 Macro Assembler (as far as I remember). It is not explictly mentioned but all sources are protected by the GPL, so you could distribute them with the corresponding hints.
Originally this program was written only for two reasons: at this time (late 1980s, as a pupil) I had too much time to waste and I wanted to teach myself programming in assembly language. Thus it was for didactic purposes and has never been published.
Code Library
1199/7913374