== I/O Ports ==
FBE0..FBE3 FBE0h Dk'tronics Real Time Clock- probably PIO Port A (RTC Data bus) FBE8 FBE1h Dk'tronics Real Time Clock- probably PIO Port B (General Purpose 8bit I/O Port) FBE2h Dk'tronics Real Time Clock - probably PIO Port C (unknown purpose) FBE3h Dk'tronics Real Time Clock - probably PIO Control FBE8h Dk'tronics Real Time Clock - (unknown purpose) PIO Port A seems to be the plain RTC Data Bus, there should be also Read and Write signals, which are maybe found in one (or both) of the '''unknown purpose''' ports?
== Software ==