For those curious about the specific changes: * linting of source code. * adjusted elektor labyrinth fudging. * has a #define which will make it use mode "E" for "E/F"-mode games. * elektor, interton: altered return values for illegal reads. * autosense support for patched version of Circledrive, and for TESTER2.PGM. * fixed mislabelling of "collisions?" shortcut. * winarcadia: changed literals in playsound() to #defines. * equivalentization of CASIN/OUT. * removed old code from e_memmap(). * fixed handling of "reset-to-monitor" and "reset-to-game". * implemented MHz and % speed measurements. * most writes to PSG ports are now considered illegal.