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 MCC-216 C64 core v2.1 release note
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* Fixed a bug in the VHDL code of the keyboard. Now, multiple keystrokes are supported by the driver

* Num Lock enables/disables the numeric keypad, when the keypad is disabled, it can be used as joystick

* F10 swaps the joyticks inputs
   - If the numeric keypad is disabled, joysticks are cycled this way : Port#1,Port#2 / Port#2,Port#1 / Port#1,Keypad / Keypad,Port#1 / etc...
   - If the numeric keypad is enabled, joysticks are cycled this way : Port#1,Port#2 / Port#2,Port#1 / etc...

* New USER menu
   - D64 images stored under the folder /C64/USER/ are displayed under this new list
   - Up to 5 D64 images can be selected before starting the BASIC with Fire button or Return

* New settings menu
   - S-Video output can be tweaked (it does not tweak anything on the VGA core)
       -> Color saturation : color output can be tuned from B&W (0) to highly saturated (31)
       -> Brightness level : brightness can be changed from 64 to 223
       -> Blanking level :  it can be changed from 32 to 127
          the blanking level has an impact on brightness too, since : blanking + brightness <= 255
       -> Burst level : it can be changed from 2 to 31
   - Keyboard layout can be changed : 4 layouts are supported : CBM-US, PS2-US, CBM-DE, PS2-DE
   - Kernal options to speed up things
       -> Fast reset in USER mode (it disable the kernal's memory check)
       -> JiffyDOS kernal in USER mode : it loads alternate ROM images KERNALJ.BIN and 1541ROMJ.BIN
          You can obtain those ROM images on Jim Brain's website : http://www.jbrain.com/
       -> Fast drive seek : it patches the 1541 ROM (normal or Jiffy) to reduce the head seek time to the minimum
       -> Fast drive spin : it patches the 1541 ROM (normal or Jiffy) to reduce the motor ON/OFF wait to 20 ms
       -> Disable checksum : it disables the sector checksum calculation in the 1541 ROM (normal or Jiffy)

TODO:

* Fix sprite issues in VIC-II
* Fix scrolling issue in VIC-II
* Improve SID audio