James Holden

BBC Micros are great, but the volume level was clearly intended to compete with a classroom full of noisy children. When playing games at night, the sound output is far too loud. It’s possible to wire in a volume control, but that would require breaking into the audio circuitry to intercept the signal before the output amplifier IC. I didn’t...

Interfacing a beeb to a PC is sometimes useful if you want to transfer data between the two systems. The BBC has an RS423 serial port on the rear of the case, but with an unusual 5-pin “domino” layout DIN plug. This carries the following signals: These are electrically compatible with the RS232 port on a PC. However, the suggested...