Upgrading a Microbee PC85 to a PC85b and adding extra Game ROMs.

[CheshireNoir]

Huh. Wonder why it doesn't work for me? Maybe those double sized ROMs I fitted are interfering with something...

The system is a 8328-4 core so no changes should be needed? I did read the tech note and it suggested I should only need new ROMs (As also suggested by ChickenMan above)

I concatenated the ROMs under DOS with "copy /b file1.bin+file2.bin outfile.bin" and I can run Space Invaders (PAK 11, behind H) and Kilopede (PAK 9, behind E) but Survivor doesn't work (PAK 12, behind I).

No Menu on bootup and I can't seem to "PAK" to the menu either.

I'm a bit stumped...

Chesh

EDIT: I notice PAK4 is not working. Going to reburn "ROM I" as that's also the one not working for Survivor so something "odd" going on there. I've checked the socket for continuity and that seems fine...
EDIT2: I have reburned the ROM I. The original was corrupt. I still don't get the menu but I do get Survivor now. PAK4 doesn't seem to do anything interesting. I'll now pull out ROM G and do another verify on it, just in case.
EDIT3: F and G verify fine.