ZX Spectrum Interfaces for Joysticks and ROM <strong>Cartridge</strong>s Most joystick interfaces which connect to the Spectrum do so via the expansion port, are digital, and generally conform to the Atari D-type sockets and wiring standard. Exceptions to these are the joystick ports on the +2 and +3 Spectrums, which have D-type sockets but are wired ...
... Expansion Systems page. At this time there are just two items, the Currah μSource, and the Skywave Software Forth IO <strong>Cartridge</strong>. More items and categories may be entered on this page in the future. Forth <strong>Cartridge</strong>s Features Original Price Skywave Software Spectrum Forth IO <strong>Cartridge</strong> A ROM <strong>cartridge</strong> containing 12K of fig-FORTH, RS232 ...
... like function keys, extra shift keys, numeric keypads, and even sound amplifiers. Joystick Interfaces (also ROM <strong>cartridge</strong> interfaces) Sinclair did not originally market the ZX Spectrum as a games machine, but with its reasonable price tag, its popularity grew, and the Spectrum gained a young audience with an appetite for video ...