The System I have currently has a B26 CPU Module with 2 Memory expansions, and a Winchester/Floppy Module to the right of it.
I also just managed to load BTOS II 8.0.2 Real Mode OS onto it.
Ok, looks like the B26 BIOS must store it at a different location than the CP-001 BIOS. The first word of the table should be a count of the items in the table.
Thankfully, the Panel Debugger can read and write to I/O ports directly - pressing either I or O after entering a port address. Had some difficulty getting it to work in MESS, but that could be because the keyboard is only a basic setup, lacking separate Next and Return keys.
Writing to port 0000 will select an X-Bus module, and reading from port 0000 will return the module ID of the selected module. Module 0 is the processor module, module 1 is the next module attached to it, and so on. An NMI is generated when you go too far (don't know how the panel debugger handles that).
