cycle exact emulator http://en.wikipedia.org/wiki/Computer_architecture_simulator https://www.youtube.com/watch?v=kICPVZDyx30 includes unit tests for almost all opcodes (*) - cycle usage callback for each single step - starts prefetching at correct cycle times (**) - starts irq sampling at correct cycle times (**) - accurate exception processing (***) (*) unit test samples were generated with amiga (**) information is taken from patent and manual, not proven with logic analyzer (***) needs more testing http://sourceforge.net/projects/portable68000/ --

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