Developed by Alan C. Watson in 1991, is another powerful diagnostic utility. Like the official program, it runs tests on the RAM, keyboard, printer, and joystick , as well as performing ROM checksums. One of its convenient features is the ability to save and load tests, providing a flexible suite for maintaining your Spectrum's operational health.
Several diagnostic tools have been developed over the years, ranging from official Sinclair factory software to modern, community-developed ROM images.
The later 128K models feature a BT-style RS-232/MIDI serial port. zx spectrum test program link
This page provides the downloadable ROM image (for emulators or burning to an EPROM), the schematic for a DIY test harness, and a legendary step-by-step text guide titled "So your Spectrum doesn't work..."
: Utility for testing I/O handling and hardware responsiveness. Target Hardware : 48K ZX Spectrum. Developed by Alan C
: It is currently listed as available on major community repositories such as World of Spectrum and Spectrum Computing .
Ensure the ULA is generating correct border colors, screen attributes, and audio beeps. One of its convenient features is the ability
Developed by , this software was primarily intended as a functional test for the machine's hardware capabilities. Unlike modern diagnostic ROMs that target deep chip-level failures, this program focuses on validating the visible and audible functions of the 48K hardware.