Acorn BBC A3000 - Serial Port upgrade

The Acorn BBC A3000 was not supplied with the relevant line driver and ACIA controller chip that supports the use of the 9-pin Serial port on the rear of the machine. By simply adding these two chips into the relevant sockets on the motherboard, you can add the serial comms capability that the connector promises.

The 65C51 ACIA and LT1133 chips fitted for the A3000 serial upgrade

Chip Availability

The line drivers are still manufactured (Jul. 2011) and a