@kosamchetoo - lol, the numeric codes are written in
hexadecimal ("base 16"), not decimal ("base 10"). Hex is written with digits 0 through 9 (for decimal 0 through 9), then A through F (for decimal 10 through 15) - possible values on the 2-digit Q-Code hex display range from 00 hex (= 0 dec) through FF hex (= 255 dec), although they aren't all used in this application. Programmers and computer folk use hex as a shorthand for binary, and binary logic is used for all the firmware's machine-level code (or microcode) interfaces. Technically, one is supposed to append "-h" to hex values (like B0h) to prevent confusion.
Most of the possible Q-Codes are described in the
R5E User Manual. It is normal for them to fluctuate during runtime as they report operating status changes for many different things - the idea is that when the system halts/crashes/fails, the last displayed Q-Code will indicate what operation caused the critical fault or what operation was happening just before it, the Q-Codes run in motherboard-embedded firmware and are a powerful tool for identifying and isolating problems caused by hardware, they greatly simplify and speed up troubleshooting.
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