SJ Research Econet Bridge
Like the earlier Acorn Bridge, the SJ Research version has two Econet interfaces. These are based on the 68B54 chip, departing from SJ Research's norm of using the Z80 family of chips. The SJ Bridge is run by a 6502 processor. This Bridge was a joint venture by Acorn and SJ Research, presumably Acorn outvoted SJ on the choice of chipset.