During power-up self test (POST), most system BIOSes write status codes to I/O port 80h or 84h. A POST code display shows the last value written to this port as a hexadecimal number (e.g. 1, B) on a LED display. If the POST code remains blank, the system BIOS is not coming up at all. Something is seriously wrong with the system board. The meaning of individual POST codes is specific to each BIOS and system vendor, and should be obtained from them. Σύνδεσμοι Προϊόντος: Schematic BIOS Central has a very complete collection of POST code tables. Mini, PCI form factor Port 80h/84h auto switch (whichever is accessed first) Test pins to connect logic analyzer to PCI bus J1: JTAG for PLD programming, manufacturing only J2: RST, CLK, FRAME2# = FRAME# delayed by one cycle (filter assistance for logic analyzer), INTA#, INTB#, 3.3, V, 5, V, GND J3: CBE3, GND, AD24.. AD31 J4: CBE2, GND, AD16.. AD23 J5: GND, PERR, DEVSEL, SERR, STOP, FRAME, TRDY, PAR, IRDY J6: CBE1, GND, AD15.. AD8 J7: CBE0, GND, AD7.. AD0
Σχετικά Προϊόντα
Ετικέτες: τεχνολογία, υπολογιστές, δικτυακά, μονάδες δεδομένων, ασύρματες, technologia, ypologistes, diktyaka, monades dedomenon, asyrmates