Differences from Beta-6b to Beta-6c:
- Auto speed option for turbo feature. Slows down on IEC bus accesses.
- PS/2 Page up/Page down alias for F1, F7. Easier navigation in the File-Browser.

Differences from Beta-6 to Beta-6b:
- 1541 emulation: fixed IEC timing. All known speedloader problems are gone now.
- 1541 emulation: VIA6522 timer fixes
- 1541 emulation: VIA6522 register r/w fixes
- new cartridge emulations: Mikro Assembler, StarDOS

Differences from Beta-5b to Beta-6:
- Fixed RAM mirrors for 1541 drive emulation
- Fixed reading from emulated SID
- cartridge emulations
	KCS power, SSv5, C64GS, Comal-80, Zaxxon, Ocean type 1,
	Simons Basic, Fun play, Super Games, Warp Speed,
	Dinamic and Magic Desk.
- Disk track lengths set to 6256, 6672, 7144 or 7696 bytes.
- Implemented disk-change with button.
- Input latch emulation in VIA emulation
- Implemented SDR register in CIA
- Implemented real IEC bus disable bit.
- VIC-II timing fixed for mode bits (MCM, BMM and ECM)

Differences from Beta-5a to Beta-5b:
- Eliminate spurious resets by masking reset line in standalone mode.
- Fix keyboard matrix so joysticks are properly emulated (IR, numpad) in standalone mode.
- Block normal button functions in menu mode (only exception is reboot by pressing 0.7s on right button)

Differences from Beta-5 to Beta-5a:
- Fix crash when turbo limit is set in menu without activating turbo.
  (or when disabling active turbo with button while a limit is set)
- Fix D030 mirror of the turbo bit emulating C128 2Mhz mode with Chameleon turbo.

Differences from dev-5 to beta-5:
- Speedup of turbo (MMU caches most recent used value)
- Speedup of turbo by eliminating one clock cycle from critical path
- I/O port status added to VGA debug bar
- Hard-reset in menu forces reboot to prevent possible MMC cart curruption
- Left button can perform various functions (menu, expert cartridge switch, turbo)
- TOD clock fixes. Support 50Hz and 60Hz depending on VIC-II type.
- Turbo has configurable speed limit (2x, 3x.. 6x)
- Button debounce improved (less likely to see multiple presses).
- non-turbo CPU speed in standalone mode more accurate: 
  Switches depending on VIC-II type between 0.985 and 1.022 Mhz
- VGA output is double-buffered to eliminate tearing effects when picture is scrolling.
- Memory areas can be made read-only with highest bit of MMU.

Differences from beta-4 to dev-5:
- Framebuffer writes now use MMU.
- Framebuffer writes can be switched off (buffer can be used by software)
- Cartridge buttons emulated on PS/2 keyboard (F11,F12 and PrintScreen)
- Chameleon can use real BASIC and Kernal ROMs in machine in cartridge mode.
- Emulated IEC bus can be disconnected from C64 (Chameleon is drive emu)
- FLI bug fixed
- Added Stereo SID support
- Turbo feature added
- Relative CPU speed displayed in VGA debug bar.
