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Check Description point
8C Late POST initialization of chipset registers.
8D Build ACPI tables (if ACPI is supported).
8E Program the peripheral parameters. Enable/disable NMI as selected.
90Late POST initialization of system management interrupt.
A0 Check boot password if installed.
A1
A2 | Take care of runtime image preparation for different BIOS modules. Fill the |
| free area in F000h segment with 0FFh. Initializes the Microsoft® IRQ |
| Routing Table. Prepares the runtime language module. Disables the |
| system configuration display, if needed. |
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A4 | Initialize runtime language module. |
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A7 | Display the system configuration screen, if enabled. Initialize the CPUs |
| before boot, including the programming of the MTRRs. |
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A8 | Prepare CPU for operating system boot, including final MTRR values. |
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A9 | Wait for user input at config display, if needed. |
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AAUninstall POST INT1Ch vector and INT09h vector.
AB | Prepare BBS in Int 19 boot. |
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AC | End of POST initialization of chipset registers. |
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B1 | Save system context for ACPI. |
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00 | Pass control to OS Loader (typically INT19h). |
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85