86
Chapter 4
Bootblock Recovery Code Checkpoints
The Bootblock recovery code gets control when the BIOS determines that a BIOS recovery needs to occur
because the user has forced the update or the BIOS checksum is corrupt. The following table describes the
type of checkpoints that may occur during the Bootblock recovery portion of the BIOS.
NOTE:
Checkpoints may differ between different platforms based on system configuration. Checkpoints
maychange due to vendor requirements, system chipset or option ROMs from add-in PCI devices.
Checkpoint
Description
E0
Initialize the floppy controller in the super I/O. Some interrupt vectors are initialized. DMA
controller is initialized. 8259 interrupt controller is initialized. L1 cache is enabled.
E9
Set up floppy controller and data. Attempt to read from floppy.
EA
Enable ATAPI hardware. Attempt to read from ARMD and ATAPI CDROM.
EB
Disable ATAPI hardware. Jump back to checkpoint E9.
EF
Read error occurred on media. Jump back to checkpoint EB.
F0
Search for pre-defined recovery file name in root directory.
F1
Recovery file not found.
F2
Start reading FAT table and analyze FAT to find the clusters occupied by the recovery file.
F3
Start reading the recovery file cluster by cluster.
F5
Disable L1 cache.
FA
Check the validity of the recovery file configuration to the current configuration of the flash
part.
FB
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.
F4
The recovery file size does not equal the found flash part size.
FC
Erase the flash part
FD
Program the flash part.
FF
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.
Содержание Veriton M4618G
Страница 1: ...Acer Veriton M4610 M4610G M4618G Service Guide PRINTED IN TAIWAN...
Страница 14: ...6 Chapter 1 Block Diagram...
Страница 61: ...Chapter 3 53 4 Removing the screws from the chassis 5 Lift the front I O and USB assembly away from chassiss...
Страница 69: ...Chapter 3 61 Install the I O Shielding 1 Install I O shielding into chassis...
Страница 71: ...Chapter 3 63 4 Connect the ATX 24Pin Power cable and ATX 4Pin Power cable to main board...
Страница 72: ...64 Chapter 3 Install the System FAN 1 Tie system fan cable 2 Push the system fan to chassis...
Страница 73: ...Chapter 3 65 3 Fix the four screws 4 Connect the system fan power cable to Main board...
Страница 78: ...70 Chapter 3 5 Close the lock handle IMPORTANT Install the 3 5 Card rule...
Страница 84: ...76 Chapter 3 Install the Right Side Panel 1 Install the side Panel then fix two Screws...
Страница 85: ...Chapter 3 77 Install the VGA Card 1 Remove the PCI fixer 2 Remove the PCI slot...
Страница 86: ...78 Chapter 3 3 Open the VGA card latch then press down the VGA card 4 Close the PCI fixer...
Страница 87: ...Chapter 3 79 Install the Front Bezel 1 Install the panel onto chassis and then check if it is Installed OK...
Страница 96: ...Chapter 5 88 M B Placement Jumper and Connector Information Chapter 5...