Reference for Amiga boot-screen error colours.

Guide to interpreting Guru Meditation error codes.

Discussion of Amiga error colours, flashes and Guru codes.

Amiga SDMAC hardware testing tools and source code.

Reference list of Amiga Guru Meditation codes.

Amiga boot-screen colours and a system-error troubleshooting checklist.

Amiga Test Kit and associated hardware-testing utilities.

Npcap is the packet capture library for Windows 10 and 11. Fast, secure, and compatible successor to WinPcap. Free to use.

Diagnostic ROM software intended to help investigate Amiga hardware faults.

Versatile Amiga Test Program package on Aminet.