Acorn
Econet
Bridge
Acorn
Econet
Bridge
This is a close up of the circuit board. The circuit board has a 6502 processor, a Bridge ROM, an 8K RAM chip and two Econet interfaces based around the 68B54 ADLC chip. Curiously here, the top ADLC is a 6854, which I think is a slightly slower version, and it is date-coded 1983, much earlier than most of the other chips on the board which are late 1980s or early 1990s. I wonder if it's a replacement chip. Another point of note is that the two line drivers are slightly different: the top on is a 26LS34 and the lower one is a 26LS30, the same as used in the Master Series Econet module.