VirtualC64 emulates a Commodore 64 personal computer on your Intel Macintosh OSx > 10.6.

I wrote the software with two major goals in mind. First, I wanted to create an emulator that can be used as a demonstrator program in a first year or second year course on computer engineering.

To achieve this goal, I have integrated various debugging capabilities that let you peek inside the CPU, RAM, ROM, or one of the custom chips. Second, I tried to make the emulator as user friendly as it can get.

In short: VirtualC64 tries to combine the ongoing fascination of the ancient Commodore computers with the great user experience of today’s Macs.

Bug fixes and enhancements:

• Introducing cheatbox. Travel back in time by reverting to automatically taken snapshot states
• T64, PRG, and P00 files can now be mounted as virtual disk
• Restructured and refactored all Objective-C classes
• Fixed a bug that caused unallocated memory to be freed

Note: The version numbering scheme is changed to comply with the update framework.

source: dirkwhoffmann.de