As told this is a prototype based on datasheet.

jmarsh wrote on 2026-08-27, 13:18:

If you set bits 4-7 of SR7 to a value other than 0, does the LFB appear at that MB boundary?

Edit: from the pics in the first post, MEMR# and MEMW# are definitely not connected. So no memory access beyond 1MB is going to work.

the design is already updated to using the lfb mem r/w pins so this is already patched in - still did not made any tests to see if it really matters but better to have it than not
thanks rasz_pl for the heads up 😀