RAM Turbo Add-on for the Sinclair ZX Spectrum

**Apologies for the poor image quality compared to the other images in this section.

Released in 1984 by RAM Electronics Ltd. (also known as Fleet Electronics Ltd.) the 'RAM Turbo' was designed to supersede and in fact replace the official Sinclair ZX 'Interface 2' with which it shares and similar casing.

The Sinclair ZX Spectrum did not natively have any joystick ports and instead relied on keyboard input. To address this in 1983 Sinclair released the Interface 2 which sported two joystick ports, a pass through interface and a ROM cartridge port.

Sounds great but in reality it was pretty limited. The pass through interface was modified to only allow use with the Sinclair printer and the joystick ports didn't support the popular Kempston or Protek joystick protocols.
The ROM cartridge port did work as advertised but as the cartridges only supported 16kB of data and most Sinclair ZX Spectrum systems were shipped or upgraded to 48kB of memory they weren't very popular.

Released only a year later the RAM Turbo addressed the two main issues with the Interface 2; its joystick ports supported Kempston (right port), Protek (left port) and Sinclair joystick code standards when used with pretty much any 9-pin joystick wired in the Atari 2600 set up. If you held down the joystick button during power on it entered Proteck 'curor mode'. Its pass through interface was unrestricted meaning that users could plug pretty much anything into it that the Sinclair ZX Spectrum could be made to support.

Later models released after December 1985 included a reset button on the side.

Considering how junky most hardware add-ons are, this is by far an exception.

RAM Turbo Sinclair ZX Spectrum RAM Turbo and Sinclair ZX Spectrum RAM Turbo Sinclair ZX Spectrum Motherboard RAM Turbo Sinclair ZX Spectrum PCB
 
Unit pictured has been sold and its location is unknown.