Following my previous question on Identifying the functionality of the memory select in Apple II and now that I know that the memory select device is simply an interconnection block. Searching for more, I found the Apple II red book where the memory select is explained with the following figure:
So I represent the interconnection scheme as I got it. For 16K/16K/16k:
Now the question is: why the last 4K block is (6000 - EFFF) and not (8000 - 8FFF)?
Is it related to RAM mirroring, bank-switched ROM or anything else?