The Comp.Sys.Sinclair Crap Games Competition 2009

BT connectors used on Sinclair microcomputers

Drive swap switch on the +3 or +3B

External floppy drive cable for the +3

Factory modifications to Amstrad built ZX Spectrums

Fixing the sound on the Spectrum +2A/+3

Flash Rom Replacement for the ZX Spectrum +2A/+3, +2B, and +3B

Keyboard matrix diagram for the ZX Spectrum +2A/+3, +2B, and +3B

ROM checksum utility

Schematics for the ZX Spectrum +2A/+3, +2B, and +3B

S-video out for the ZX Spectrum +2A/+3, +2B, and +3B

The Sinclair FAQ Wiki