ZX Spectrum ULA
The ULA, or Uncommitted Logic Array, chip was a key component of the ZX Spectrum.
ZX Spectrum IC26
Guide to the ZX Spectrum IC26 Chip
ZX Spectrum IC25
Guide to the ZX Spectrum IC25 Chip
ZX Spectrum IC24
Guide to ZX Spectrum IC24 Logic Chip
ZX Spectrum IC23
Guide to ZX Spectrum IC23
ZX Spectrum IC4
Guide to ZX Spectrum IC4 Chip
ZX Spectrum IC3
Traces for ZX Spectrum IC3 Chip
ZX Spectrum Repair – Post Plugin Tests
Once you have done your pre-power checks run these to make sure the basics are working OK
ZX Spectrum Repair – Composite Video Mod
Easily modify your ZX Spectrum 48k to work on modern TVs
ZX Spectrum Repair - Before You Plug In
A collection of tests to run before plugging in a unknown ZX Spectrum
Testing Lower RAM On The ZX Spectrum For Beginners
Guide to testing the lower ram of the ZX Spectrum 48k
