BT Merlin M2105 ROM disassemblies

I noticed another topic about disassembled and recreated software, so I thought I’d mention this dormant project of mine:

It refers to the BT Merlin M2105 messaging terminal that was used in some commercial settings in the UK in the 1980s. It was a fairly creative way to redeploy Acorn Electron hardware, plus an expansion box, monitor and printer to make a communications terminal.

Currently, the disassemblies can be reassembled to produce exact copies of the original ROMs, though this doesn’t mean that the listings are very meaningful. There are some annotations and notes which describe what certain pieces of code do, but these only give an idea about the architecture of the system as a whole.