Gateway 9315 Benutzerhandbuch

www.gateway.com

The Bootblock initialization code sets up the chipset, memory, and other components 
before system memory is available. The following table provides the diagnostic LED codes 
for these checkpoints and describes the type of checkpoints that may occur during the 
bootblock initialization:

AB

O

Off

O

G

Prepare BBS in Int 19 boot.

AC

O

G

R

Off

End of POST initialization of chipset registers.

B1

R

Off

R

O

Save system context for ACPI.

00

Off

Off

Off

Off

Pass control to OS Loader (typically INT19h).

61-70

-

-

-

-

OEM  POST  Error.  This  range  is  reserved  for  chipset  vendors  and 
system manufacturers. The error associated with this value may 
be different from one platform to the next.

Before 
D1

R

R

Off

O

Early chipset initialization is done. Early super I/O initialization 
is done, including RTC and keyboard controller, NMI is disabled.

D1

R

R

Off

O

Perform keyboard controller BAT test. Check if waking up from 
power management suspend state. Save power-on CPUID value 
in scratch CMOS.

D0

R

R

Off

R

Go to flat mode with 4 GB limit and GA20 enabled. Verify the 
bootblock checksum.

D2

R

R

G

R

Disable CACHE before memory detection. Execute full memory 
sizing module. Verify that flat mode is enabled.

D3

R

R

G

O

If memory sizing module not executed, start memory refresh and 
do memory sizing in Bootblock code. Do additional chipset 
initialization. Re-enable CACHE. Verify that flat mode is enabled.

D4

R

O

Off

R

Test base 512 KB memory. Adjust policies and cache first 8 MB. 
Set stack

D5

R

O

Off

O

Bootblock code is copied from ROM to lower system memory and 
control is given to it. BIOS now executes out of RAM.