Zx Spectrum Test Program Link [NEW]

| Error Message | Likely Fault | Fix | | :--- | :--- | :--- | | RAM 0 BIT 0 FAIL | Lower 16K bank, Chip IC6 (D0 data line) | Replace 4116 or 4532 DRAM | | CONTENTION FAIL | ULA pin 28 (Contention logic) | Replace ULA (5C112E or 6C001E-7) | | ROM CHECKSUM: BAD | Corrupted ROM or address line short | Re-burn ROM or check CPU A14/A15 lines | | EXTERNAL BUS: FLOATING | Broken track between CPU and ULA | Inspect data bus (D0-D7) continuity |

You can find the latest version (v1.73 as of late 2025) and full PDF documentation at Retroleum.co.uk . 2. Brendan Alford’s ZX Diagnostics zx spectrum test program link

Load the program using a standard ZX Spectrum interface (like an SD-card based DivMMC). Alternative Way to Play (No Test Needed) | Error Message | Likely Fault | Fix

In the modern retro-computing scene, the "Test Program Link" has evolved into a dedicated hardware tool known as the . Alternative Way to Play (No Test Needed) In

: A highly accurate and free emulator available for multiple platforms [9, 29].

Arguably the most popular modern diagnostic tool in the scene, Brendan Alford’s open-source diagnostic software is designed to run from an external ROM cartridge or an EEPROM replacement chip.

It tests RAM, ROM, and ULA without needing a working CPU to load tape software. Where to find it: Retroleum Diagnostics Site 2. Tape-Based Test Programs