F8E7h,FAE7h,FCE7h,FEE7h PIO 8255 Port C
F9E7h,FBE7h,FDE7h,FFE7h PIO 8255 RS
The distance between the Port A / Port B address mirros mirrors is 100h bytes. This allows to read 8 bytes (aka four 16bit words) at very fast speed, by using a sequence of INI opcodes (which read from I/O port address BC, and decrement B).
== Images ==