Code | Beeps | POST Routine Description |
|
|
|
51h |
| Initialize EISA board |
52h |
| Test keyboard |
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|
|
54h |
| Set key click if enabled |
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|
|
58h | Test for unexpected interrupts | |
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|
|
59h |
| Initialize POST display service |
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|
|
5Ah |
| Display prompt Press F2 to enter SETUP |
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|
|
5Bh |
| Disable CPU cache |
|
|
|
5Ch |
| Test RAM between 512 and 640 KB |
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|
|
60h |
| Test extended memory |
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|
|
62h |
| Test extended memory address lines |
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|
|
64h |
| Jump to UserPatch1 |
|
|
|
66h |
| Configure advanced cache registers |
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|
|
67h |
| Initialize Multi Processor APIC |
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|
|
68h |
| Enable external and CPU caches |
|
|
|
69h |
| Setup System Management Mode (SMM) area |
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|
|
6Ah |
| Display external L2 cache size |
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|
|
6Bh |
| Load custom defaults (optional) |
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|
|
6Ch |
| Display |
|
|
|
6Eh |
| Display possible high address for UMB recovery |
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|
|
70h |
| Display error messages |
|
|
|
72h |
| Check for configuration errors |
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|
|
76h |
| Check for keyboard errors |
|
|
|
7Ch |
| Set up hardware interrupt vectors |
|
|
|
7Eh |
| Initialize coprocessor if present |
|
|
|
80h |
| Disable onboard Super I/O ports and IRQs |
|
|
|
81h |
| Late POST device initialization |
|
|
|
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 Data 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 |
|
|
|
95h |
| Install CD ROM for boot |
|
|
|
154 | Chapter 4 |