Intel AN430TX - Motherboard - ATX Technical Product Specification page 76

AN430TX Motherboard Technical Product Specification
Table 44. Port 80h Codes (continued)
Code Description of POST Operation Currently In Progress
A8h Erase F2 prompt
AAh Scan for F2 key stroke
ACh Enter SETUP
AEh Clear IN POST flag
B0h Check for errors
B2h POST done - prepare to boot operating system
B4h One short beep before boot
B5h Terminate QuietBoot
B6h Check password (optional)
B8h Clear global descriptor table
B9h Clean up all graphics
BAh Initialize DMI parameters
BBh Initialize PnP Option ROMs
BCh Clear parity checkers
BDh Display MultiBoot menu
BEh Clear screen (optional)
BFh Check virus and backup reminders
C0h Try to boot with INT 19
C1h Initialize POST Error Manager (PEM)
C2h Initialize error logging
C3h Initialize error display function
C4h Initialize system error handler
The following are for boot block in Flash ROM
E0h Initialize the chipset
E1h Initialize the bridge
E2h Initialize the CPU
E3h Initialize system timer
E4h Initialize system I/O
E5h Check force recovery boot
E6h Checksum BIOS ROM
E7h Go to BIOS
E8h Set Huge Segment
E9h Initialize Multi Processor
EAh Initialize OEM special code
EBh Initialize PIC and DMA
ECh Initialize Memory type
EDh Initialize Memory size
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