Generatora Sega - Genesis / Sega CD / 32X Emulator on the Windows platform
Generator uses it's own custom 68000 processor emulation which is designed for dynamic recompilation, and uses techniques from this such as block-marking, flag calculation removal, operand pre-calculation, endian pre-conversion etc. There are approximately 1600 C routines generated by the first stage of compilation to cope with the 67 instruction families. These routines are used as a 'backup' when dynamic recompilation isn't supported on your platform or the recompiler doesn't support a particular instruction. The CPU engine is by all accounts very fast, whatever the mode.
Author's website: http://www.squish.net/generator/
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