6502 Assembler & Simulator


An introduction to 6502 programming can be found here: Machine Language For Beginners


Orgasm 0.22 for Mac OS X

This is an OS X version of Robert Norris' 6502 assembler called Orgasm. It can be used to generate object files for use with j6502. You can download it here.

To run it, type "orgasm -o output-file input-file", where input-file is a 6502 assembler file, and output-file is the generated object code.


j6502 1.2

This is a new version of Richard Russo's 6502 simulator called j6502. The documentation still refers to version 1.0, but the program should be comprehensible as it is. You can download it here.

Changes from the original version include:


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