[41CL WARP] XEQ+ oddness

[MeindertKuipers]

This bank switching is still pretty complicated. Based on the documentation:
- HP41CL switches a bank per PORT (2 pages)
- MLDL2000 switches a bank per PORT (2 pages)
- Clonix/NoVRAM: probably switches per page, but I have not seen any real confirmation in the docs
- DM41X: appears to switch per page as per the .MOD settings
- real HP41: depends on the implementation in the module

In addition in the DM41X it is not possible to have bank switching in RAM pages, but this is very well possible in the 41CL and MLDL2000. Not certain for Clonix/NovRAM