Toshiba QOSMIO E10 Maintenance Manual page 66

2 Troubleshooting Procedures
Table 2-4 Debug port (Boot mode) error status (1/8)
D port status
Permission of A20 and Clear of
software reset bit
Prohibition of APIC
Initialization of MCHM, ICHM
Initialization of Super I/O
Initialization of debug port
Dummy read of 3
PIT CH0 initialization (for
F000h
HOLD_ON)
BIOS rewrite factor flag
initialization
CHECK SUM CHECK
EC/KBC rewrite check
F001h
If "rewrite" is requested, go to
"BIOS rewrite process".
Transition of process to System
BIOS IRT when returned to S3)
BIOS rewrite request check
F005h
BIOS rewrite request check if
Checksum check error occurred
on except Boot Block or rewrite is
required by user. "BIOS rewrite
process".
Transits to System BIOS IRT.
F007h
BIOS rewrite
2-20
Inspection items
rd
Bus data
2.4 System Board Troubleshooting
Details
Transition to protected mode
Boot block checksum (halts when error)
Checksum other than boot block (skip
when returned to S3)
Key input
Check of Tilde key, Tab key if a key is
pressed
Initialization of ICHM. D31
DRAM configuration
Permission of cache (L1 cache only)
Memory clear
Transition to real mode and copy of BIOS
to RAM
QOSMIO E10 Maintenance Manual (960-492)