Re: Pretty nice machine
Ah the memories. I spent weeks tracing out the circuit diagram of my Lynx using a multimeter - it was all standard TTL except for the CPU and graphics controller - and eventually got CP/M running with a home-made disk controller and BIOS.
My memory of the bank-switching logic is rather hazy, but I think you could separately control read and write access to memory. So to switch banks, first enable write access into the new bank, copy the code you are currently executing from the old bank to the same address on the new, then switch read access.
Annoyingly my Lynx went for recycling in the last loft clear-out.