Operation
POST cards are inserted into an expansion slot, and are available in ISA (also supporting EISA), PCI, parallel port, and other variants (Mini PCIe, for laptop computers, is supported by some cards, but with restrictions). A typical card for desktop computers has both an ISA interface on one edge, and PCI on another; a card for laptop computers has both a miniPCI and a parallel port connector (plus USB to supply power).
Information on the meaning of POST codes for different BIOSes is needed to interpret the codes. This is supplied with cards, but becomes dated as later BIOSes are issued; up-to-date information is available on manufacturers' and independent websites.
In addition to displaying numeric codes, many cards monitor power supply voltages, clock and oscillator signals, reset signal, and other parameters.
Read more about this topic: POST Card
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