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| User’s Manual | |
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Code (hex) | Name | Description |
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72 | Install FDD | Enter setup check and auto11 configuration check up Initialize |
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| floppy disk drive controller and any drives. Install FDD and setup |
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| BIOS data area parameters |
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73 | Install FDD | Initialize hard drive controller and any drives. IDE device |
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| detection and install Initialize any serial and parallel ports (also |
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| game port). |
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74 | Detect & Initialize Math | Initialize math coprocessor. |
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| Coprocessor |
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75 | HDD Check for Write | HDD check out |
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| protection |
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76 | Reserved |
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77 | Display POST error | Check POST error and display them and ask for user intervention |
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| Ask password security (optional). |
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78 | CMOS and Option | Write all CMOS values back to RAM and clear screen. Enable |
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| ROM Init | parity checker Enable NMI, Enable cache before boot. Initialize |
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| any option ROMs present from C8000h to EFFFFh. |
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| NOTE: When FSCAN option is enabled, ROMs initialize from |
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| C8000h to F7FFFh. |
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79 | Reserved |
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7A | Reserved |
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7B | Reserved |
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7C | Reserved |
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7D | Boot Medium detection | Read and store boot partition head and cylinders values in RAM |
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7E | Final Init | Final init for last micro details before boot |
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7F | Special KBC patch | Set system speed for boot. Setup NumLock status according to |
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| Setup. |
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80 | Boot Attempt | Set low stack Boot via INT 19h. |
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FF | Boot |
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