When troubleshooting old computers, it helps to have the proper hardware. Mr. Green’s Workshop, a channel over at YouTube, recently delved into his experience troubleshooting an old X86 firewall motherboard. In the past, a POST code reader was used to help interpret BIOS POST codes that alert the user to errors when the machine first boots. In this case, he’s created a POST code reader using a Raspberry Pi Pico.
This custom-made Pico-powered POST card doubles as an LPC (low pin count) bus sniffer. If you’re not familiar with what an LPC bus does, you can find more details about it in his Pico POST card video. In short, this communication bridge is necessary for the Pico to evaluate the BIOS Post codes produced when the machine first boots.
