VirtualC64

What's New:

Licensing
- All files of the core emulator, except reSID, are now dual-licensed. In addition to the existing GPL license, they are licensed under the Mozilla Public License v2. The GUI code is still published under GPL only.

Enhancements
- Improved thread management
- Added a new menu option for simulating the execution of a BRK instruction.
- Memory can now be read or modified inside the RetroShell debugger.

Bug fixes
- Fixed a bug in the CPU reset routine.
- Fixed a bug that prevented some snapshots from being restored when a cartridge was attached.
- The CPU’s processor port values were not written into snapshot files.
- PET strings extracted from P00 files got the wrong padding character.
- The CIA inspector panel always shows the contents of CIA 1.
- The saved dot mask setting did not get restored on startup.

Internal changes
- Large data structures are now created on the heap rather than the stack.
- In debug builds, debug variables can be switched on and off dynamically in RetroShell.
- The internal run loop has been simplified.
- CIAs are now executed by the event scheduler (like in vAmiga).
- IEC bus updates are now triggered via events.