Here’s the source code (or at least comments about the assembled op codes) to the example program: https://github.com/trebonian/visual6502/blob/master/testprogr

Here’s the source code (or at least comments about the assembled op codes) to the example program: https://github.com/trebonian/visual6502/blob/master/testprogram.js https://github.com/trebonian/visual6502/blob/master/testprog... It looks like that subroutine they call at $0010 has a special hook that writes to the console whenever they write to memory address $0f.