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| Appendix |
3E | Try to turn on Level 2 cache. | |
| Note: Some chipset may need to turn on the L2 cache in this stage. | |
| But usually, the cache is turn on later in POST 61h. | |
Reserved. | ||
BF | 1. | Program the rest of the Chipset's value according to Setup. |
| (Later Setup Value Program) | |
41 | 2. | If |
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42 | Initialize floppy disk drive controller. | |
43 | Initialize Hard drive controller. | |
45 | If it is a PnP BIOS, initialize serial & parallel ports. | |
44 | Reserved. | |
45 | Initialize math coprocessor. | |
Reserved. | ||
4E | If there is any error detected (such as video, kb...), show all error | |
| messages on the screen & wait for user to press <F1> key. | |
4F | 1. | If password is needed, ask for password. |
| 2. | Clear the Energy Star Logo. (Green BIOS only) |
50 | Write all CMOS values currently in the BIOS stack area back into the | |
| CMOS. | |
51 | Reserved. | |
52 | 1. | Initialize all ISA ROMs. |
| 2. | Later PCI initializations. (PCI BIOS only) |
| - assign IRQ to PCI devices. | |
| - initialize all PCI ROMs. | |
| 3. | PnP Initialzations. (PnP BIOS only) |
| - assign IO, Memory, IRQ & DMA to PnP ISA devices. | |
| - initialize all PnP ISA ROMs. | |
| 4. | Program shadows RAM according to Setup settings. |
| 5. | Program parity according to Setup setting. |
| 6. | Power Management Initialization. |
| - | Enable/Disable global PM. |
| - | APM interface initialization. |
53 | 1. | If it is NOT a PnP BIOS, initialize serial & parallel ports. |
| 2. | Initialize time value in BIOS data area by translate the RTC time |
| value into a timer tick value. | |
60 | Setup Virus Protection. (Boot Sector Protection) functionality | |
| according to Setup setting. | |
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