The port started a number of months before the emulator was available.Why are you developing a new Forth for VICE C64? There are already plenty of FORTHs for C64. X16 has a WDC 65C02 CPU and one could use the features of that to advantage. Still it might be useful to have CamelForth for C64. One could probably have the same source code but use a preprocessor to use different instructions for the two CPUs.