Foxconn Inferno Katana - Manual (Page 32)

25
2
25
87 Execute BIOS setup if needed / requested. Check boot password if
installed.
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
90 Initialization of system management interrupt by invoking all handlers.
Please note this checkpoint comes right after checkpoint 20h
A1 Clean-up work needed before booting to OS.
A2 Takes 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.
A4 Initialize runtime language module. Display boot option popup menu.
A7 Displays the system configuration screen if enabled. Initialize the CPU’s
before boot, which includes the programming of the MTRR’s.
A9 Wait for user input at config display if needed.
AA Uninstall POST INT1Ch vector and INT09h vector.
AB Prepare BBS for Int 19 boot. Init MP tables.
AC End of POST initialization of chipset registers. De-initializes the ADM
module.
B1 Save system context for ACPI. Prepare CPU for OS boot including final
MTRR values.
00 Passes control to OS Loader (typically INT19h).
4. ACPI Runtime Checkpoints
ACPI checkpoints are displayed when an ACPI capable operating system either enters
or leaves a sleep state. The following table describes the type of checkpoints that
may occur during ACPI sleep or wake events:
Checkpoint Description
AC First ASL check point. Indicates the system is running in ACPI mode.
AA System is running in APIC mode.
01, 02, 03,
04, 05 Entering sleep state S1, S2, S3, S4, or S5.
10, 20, 30,
40, 50 Waking from sleep state S1, S2, S3, S4, or S5.