You could plausibly make bank switching work, but it’d take some effort. You’d want your block RAM to act as a write back cache, and then any bank switch must b

You could plausibly make bank switching work, but it’d take some effort. You’d want your block RAM to act as a write back cache, and then any bank switch must be intercepted and delayed until you can flush the full contents of the cache to memory. Or if bank switching is fast and occurs too frequently for that to be viable, you could avoid the flush across a bank switch, but then you may need to perform a bank switch for an eviction.