Brand: RAM Electronics (Fleet) Ltd.
Model: Turbo
Country of origin: United Kingdom
First year of production: 1984
(Version with reset button: 1985)
Price: £22.95
The RAM Turbo was a much improved version of Sinclair’s own ZX Interface 2.
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Unlike the ZX Interface 2 it could not be plugged into a ZX Spectrum while it is still powered on, had a full width ZX Spectrum compatible pass-through edge connector and it would add +5 volts to pin 7 for rapid-fire joysticks.
Both joystick ports: Sinclair ZX Interface 2 protocol. Right joystick port: Kempston protocol.
Hold down the joystick button during power-on on the left port to enter Protek’s ‘cursor keys’ protocol.
Later versions also featured a reset button.