4) Change the memory map, to take advantage of the RAM capacity of the MEGA65 5) Exchange awkward code, that was necessary due to a bad bank switching design 6) Optimise existing code: faster and shorter alogrithms 7) Use the hardware multiplication and divison unit of the MEGA65
8) Implement convenient features, like the DOS wedge It would be nearly impossible to work on these tasks without the original source codes as a starting point, but thanks to Bo Zimmerman, who probably hosts the largest arvchive of CBM related technical information, ROM images and software, I could find the necessary source files of Dennis Jarvis, one of the former C65 developers.