Code | Beeps | POST Routine Description |
|
|
|
82h |
| Detect and install external RS232 ports |
83h |
| Configure |
|
|
|
84h |
| Detect and install external parallel ports |
|
|
|
85h |
| Initialize |
|
|
|
86h |
| |
|
|
|
87h |
| Configure Motherboard Configurable |
|
| Devices (optional) |
|
|
|
88h |
| Initialize BIOS Area |
|
|
|
89h |
| Enable |
|
|
|
8Ah |
| Initialize Extended BIOS Data Area |
|
|
|
8Bh |
| Test and initialize PS/2 mouse |
|
|
|
8Ch |
| Initialize floppy controller |
|
|
|
8Fh |
| Determine number of ATA drives |
|
| (optional) |
|
|
|
90h |
| Initialize |
|
|
|
91h |
| Initialize |
|
|
|
92h |
| Jump to UserPatch2 |
|
|
|
93h |
| Build MPTABLE for |
|
| boards |
|
|
|
95h |
| Install CD ROM for boot |
|
|
|
96h |
| Clear huge ES segment register |
|
|
|
97h |
| Fixup Multi Processor table |
|
|
|
98h | Search for option ROMs. One long, two | |
|
| short beeps on checksum failure. |
|
|
|
99h |
| Check for SMART drive (optional) |
|
|
|
9Ah |
| Shadow option ROMs |
|
|
|
9Ch |
| Set up Power Management |
|
|
|
9Dh |
| Initialize security engine (optional) |
|
|
|
9Eh |
| Enable hardware interrupts |
|
|
|
9Fh |
| Determine number of ATA and SCSI |
|
| drives |
|
|
|
A0h |
| Set time of day |
|
|
|
A2h |
| Check key lock |
|
|
|
A4h |
| Initialize Typematic rate |
|
|
|
A8h |
| Erase F2 prompt |
|
|
|
AAh |
| Scan for F2 key stroke |
|
|
|
ACh |
| Enter SETUP |
|
|
|
AEh |
| Clear Boot flag |
|
|
|
B0h |
| Check for errors |
|
|
|
B2h |
| POST done- prepare to boot operating |
|
| system |
|
|
|
B4h | 1 | One short beep before boot |
|
|
|
B5h |
| Terminate QuietBoot (optional) |
|
|
|
B6h |
| Check password (optional) |
|
|
|
108 | Chapter 4 |
