MESS v0.135u3 SVN r6633 is released.MESS is a free emulator which emulates a large variety of different systems.

MESS SVN Changelog:
r6631
[C1541] Added C1540 device for VIC-20. Added weak bits simulation, now Bruce Lee loads.
r6632
Fixed 64-bit GCC compile.
r6633
[C1571] Added device skeleton.

Download: MESS v0.135u3 SVN r6633
Source:Here