So I have started tinkering with the code

In IRP.h I changed the following integers to long long:

long long value0(char *&eq);
long long value1(char *&eq);
long long value2(char *&eq);

I then changed their corresponding values in IRP.cpp

For example:

int IRP::value2(char *&eq)

was changed to

long long IRP::value2(char *&eq)

I am getting different results in the hex file that is produced so that is some progress. I am out of time at the moment. I will keep working this. :)