ZX Spectrum 16k 48k 128k +2 +3 Diagnostic Test Cartridge - 4in1 External ROM
 
Regain the full potential of your retro gaming experience with our ZX Spectrum Diagnostic Test Cartridge | 4in1 ROM. Designed to troubleshoot and help repair a wide range of models, including the ZX Spectrum 16k, 48k, 48k+, 128k, +2 (Grey), as well as the later black +2 A/B and +3 Amstrad models, this essential tool addresses Memory and ULA faults, ensuring your system runs smoothly. Easy to use and incredibly versatile, this cartridge is an indispensable addition to any retro hardware enthusiast’s collection. Elevate your repair game with the assurance of our trusted suppliers quality and dedication to the retro community.
 
This Cartridge is a 4in1 Diagnostic Cartridge to help troubleshoot, and repair ZX Spectrum.

1. Retroleum Diagnostic ROM v1.71  (16,48,128k Memory, ULA and other System Tests). By Phil Ruston
2. Smith & Alford Diagnostics, 0.37D  (16,48,128k Memory, ULA and System Tests).
3. Official Sinclair ZX 48k Spectrum Test ROM, By Dr. Ian Logan  (Memory and System Tests).
4. Official ZX Spectrum 128k and 128k +2 Test, By Dr. Ian Logan  (Memory and System Tests).

  - The EEPROM is pre-programmed with a range of diagnostic and test software.
  - This cartridge uses a Winbond 27C512 EEPROM,
  - With a user-friendly ROM selector switch and information to set the cartridge  for each test program.
  - Incorporates LED'S to indicate +5v, -5V, +9v and +12V when troubleshooting.
 
Please be aware there are no +9v or -5v on the later Black Amstrad models.