Intel SPSH4 Product Guide - Page 155

Table 18. Standard BIOS POST Codes (continued) CP Beeps Reason 7D Intelligent system monitoring 7E Test coprocessor if present 82 Detect and install external RS232 ports 85 Initialize PC-compatible PnP ISA devices 86 Re-initialize on board I/O ports 88 Initialize BIOS Data Area 8A Initialize Extended BIOS Data Area 8C Initialize floppy controller 90 Initialize hard disk controller 91 Initialize local bus hard disk controller 92 Jump to UserPatch2 93 Build MPTABLE for multi-processor boards 94 Disable A20 address line 95 Install CD-ROM for boot 96 Clear huge ES segment register 98 1-2 Search for option ROMs. One long, two short beeps on checksum failure 9A Shadow option ROMs 9C Set up Power Management 9E Enable hardware interrupts A0 Set time of day A2 Check key lock A4 Initialize typematic rate A8 Erase F2 prompt AA Scan for F2 key stroke AC Enter SETUP AE Clear in-POST flag B0 Check for errors B2 POST done - prepare to boot Operating System B4 1 One short beep before boot B5 Display MultiBoot menu B6 Check password, password is checked before option ROM scan B7 ACPI initialization B8 Clear global descriptor table BC Clear parity checkers BE Clear screen (optional) BF Check virus and backup reminders C0 Try to boot with INT 19 C8 Forced shutdown C9 Flash recovery DO Interrupt handler error Continued Error Messages and Error Codes 155