Micro64 v1.00.2011.11.15 Build 623 is released. Micro64 is a freeware commodore c64 emulator. Currently micro64 has two different VIC II emulation modes: cycle exact (default, works fine) and half-cycle exact (next-gen, rudimentary implementation – currently damn slow).

Micro64 v1.00.2011.11.15 Build 623 Changelog:
- Optimized VIC and CIA emulations (usage of more reasonable function inlining, removed wasted memory accesses, and so on) for a bit more better overall performance on mid-range and high-end CPUs.
- More function inlining optimizations
- Again more function inlining code optimizations.

Download: Micro64 v1.00.2011.11.15 Build 623
Source: Here