Link: Zx Spectrum Test Program

The , specifically the version published by Sinclair Research Ltd in 1985, is a legacy utility designed for internal diagnostics and Input/Output (I/O) handling on the 48K ZX Spectrum. Overview & Utility

Note: This article assumes a basic familiarity with the ZX Spectrum platform, its memory map, and its tape/disk loading model. Where necessary, concise technical detail is provided to make the procedures actionable. zx spectrum test program link

This article provides a curated list of the best diagnostic tools, explains how to use them, and offers direct access to essential diagnostic software. What is a ZX Spectrum Diagnostic ROM? The , specifically the version published by Sinclair