All of these settings are saved on disc as part of your backup. So when you load the Multiface-saved copy, it knows exactly how to set up each chip.
== Technical ==
As said above, the multiface watches the bus for writes to I/O ports, and memorizes the written values (required since most of the Gate Array and CRTC ports are write-only). Reading the memorized values is probably done via these I/O ports:
#FEE8 Multiface II (unknown function)
#FEEA Multiface II (unknown function)
The exact function of these registers is still unknown?
== Toolkit ==