Acer EL1800 Technical Information PDF herunterladen (Seite 54)

Checkpoint Description

Make flash write enabled through chipset and OEM specific method. Detect proper flash

part. Verify that the found flash part size equals the recovery file size.

The recovery file size does not equal the found flash part size.

Erase the flash part.

Program the flash part.

The flash has been updated successfully. Make flash write disabled. Disable ATAPI

hardware. Restore CPUID value back into register. Give control to F000 ROM at

F000:FFF0h.

Disable NMI, Parity, video for EGA, and DMA controllers. Initialize BIOS, POST, Runtime

data area. Also initialize BIOS modules on POST entry and GPNV area. Initialized CMOS

as mentioned in the Kernel Variable "wCMOSFlags."

Check CMOS diagnostic byte to determine if battery power is OK and CMOS checksum is

OK. Verify CMOS checksum manually by reading storage area. If the CMOS checksum is

bad, update CMOS with power-on default values and clear passwords. Initialize status

Initializes data variables that are based on CMOS setup questions. Initializes both the 8259

compatible PICs in the system

Initializes the interrupt controlling hardware (generally PIC) and interrupt vector table.

Do R/W test to CH-2 count reg. Initialize CH-0 as system timer. Install the POSTINT1Ch

handler. Enable IRQ-0 in PIC for system timer interrupt.

Traps INT1Ch vector to "POSTINT1ChHandlerBlock."

Fixes CPU POST interface calling pointer.

Initializes the CPU. The BAT test is being done on KBC. Program the keyboard controller

command byte is being done after Auto detection of KB/MS using AMI KB-5.

Early CPU Init Start -- Disable Cache – Init Local APIC.

Set up boot strap processor Information

Set up boot strap processor for POST

Enumerate and set up application processors

Re-enable cache for boot strap processor

Early CPU Init Exit

Initializes the 8042 compatible Key Board Controller.

Detects the presence of PS/2 mouse.

Detects the presence of Keyboard in KBC port.

Testing and initialization of different Input Devices. Also, update the Kernel Variables.

Traps the INT09h vector, so that the POST INT09h handler gets control for IRQ1.

Uncompress all available language, BIOS logo, and Silent logo modules.

Early POST initialization of chipset registers.

Relocate System Management Interrupt vector for all CPU in the system.

Uncompress and initialize any platform specific BIOS modules. GPNV is initialized at this

checkpoint.

Initializes different devices through DIM.

See DIM Code Checkpoints section of document for more information.

Initializes different devices. Detects and initializes the video adapter installed in the system

that have optional ROMs.

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