ZX Spectrum Interfaces for Joysticks and <strong>ROM 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 ...
... on this page in the future. Forth Cartridges Features Original Price Skywave Software Spectrum Forth IO Cartridge A <strong>ROM cartridge</strong> containing 12K of fig-FORTH, RS232 interface via an 8251, and 24 bits of parallel I/O via an 8255.The BASIC ROM is switched out and replaced by the Forth ROM. Features a Z80 assembler for machine code ...
... extras like function keys, extra shift keys, numeric keypads, and even sound amplifiers. Joystick Interfaces (also <strong>ROM 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 ...