Jeśli chodzi o debugger to mam takie coś.
Fragment Readme.txt
"========================================================================
650x Macroassembler & Simulator ver. 0.1.8176.1
========================================================================
This is second release of my 6502 macroassembler & simulator.
It consists of integrated macroassembler (6502 & 65c02), simulator and
debugger. It was written from scratch (unfortunately without access to
real 6502 microprocessor).
It's primary goal was help othersn to learn 6502 assembly language.
So, it may not (and is not) 100% reliable. It lacks some functionality
(like listing generation) and contains some bugs. It's not intended
to write programs for microcontrollers (although it's possible).
It's provided as is, without warranty of any kind. It's free software.
You can use it on as many computers as you wish, copy it, but NOT sell.
There is no English help to 6502.exe. I havn't enough time to translate
it. Sorry. Assembler syntax is close to the 8-bit Atari MAC-65 if you
know that one. Help contains exact explaation of syntax and 6502/65c02
commands, but only in Polish.
If you have any comments and/or suggestions please feel free to drop
me an e-mail (mkowalsk@friko5.onet.pl).
Michal Kowalski"
Szczerze mówiąc nie uzywałem.
A to screenshot: http://img516.imageshack.us/my.php?image=6502zz0.jpg