ZX Interface 1/2

Sinclair Research made two expansion interfaces for the ZX Spectrum in 1983. They are different devices, each with its own page:

• Sinclair ZX Interface 1: the Microdrive controller, with a network and an RS-232 port. Its care, fault-finding and capacitor pages are Sinclair ZX Interface 1 General Maintenance, Sinclair ZX Interface 1 Troubleshooting Guide and Sinclair ZX Interface 1 Capacitor Replacement Guide.
• Sinclair ZX Interface 2: two joystick sockets and a ROM cartridge slot. Its care and fault notes are on its own page.