Micro64 v1.00.2012.05.31 Build 674 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 v1.00.2012.05.31 Build 674 Changelog:
- Fixed a bug in the diskette image directory reader
- Optimized 1541 emulation routines for bit more performance
- Removed fixed-bitsync-1541-emulation-variant for P64/FDI diskette images,
so it is now only for D64/G64/X64/NIB diskette images. So at P64/FDI
diskette images the full-1541-circuit-emulation-variant is always active
now.

Download: Micro64 v1.00.2012.05.31 Build 674
Source: Here