Z64K (2019/05/04) is released. Pixel exact emulation of the Commodore 64, VIC 20 and Atari 2600 written entirely in Java. The emulators should run on any platform with an updated java runtime environment installed.

Z64K Changelog:
4 May
Updated C128 Machine monitor commands rb0 and rb1 to no longer mess with MMU.
rb0 - debug using memory in RAM bank 0
rb1 - debug using memory in RAM bank 1
system - debug using system view of memory (defaults back to this when exiting monitor)
breakpoints for c128 now have 17 bit range. eg:-
bk e000 will set a breakpoint at bank 0 location e000
bk 1e000 will set a breakpoint at bank 1 location e000.

Download: Z64 (2019/05/04)
Source:Here