As I mentioned in my earlier MECB posts, I wanted to be able to create MECB boards which implemented addressing flexibility.
This is to allow any I/O board design to be utilised with different retro 8-bit CPU boards, and with different memory maps. This would then support whatever 8-bit CPU based system design, I might want to explore & experiment with.
See how I provided simplicity & consistency to the MECB address decoding, here: Minimalist Europe Card Bus (MECB) – Address Decode / Glue Logic ATF16V8