C128 Programmers Reference Guide: For the basic VDC register routines and VDC code inspiration http://www.zimmers.net/anonftp/pub/cbm/manuals/c128/C128_Programmers_Reference_Guide.pdf Scott Hutter - VDC Core functions inspiration: https://github.com/Commodore64128/vdc_gui/blob/master/src/vdc_co...