commodore 8032 vga / ports to monitor

I guess that for my vga board, all I need to monitor

is the write in CRTC  (to reconfigure the screen emulated in the propeller)

and the write in $FFF0 to detect when the screen or I/O area are 
shadowed by the 64k extension ?


I've not seen anything else in PIA/VIA but I may have missed something

for me the 8032 it's quite old...


thanks





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