Troubleshooting Procedures - Toshiba Tecra A2-S316 Maintenance Manual

2.4 System Board Troubleshooting
D port
Inspection items
status
F000h Start
F001h Initializing a KBC (1)
F002h Checking whether BIOS
rewrite is requested
F003h BIOS rewrite
Satellite A50/TECRA A2 Maintenance Manual (960-478)
Table 2-3 D port status (1/9)
Enabling address line A20 and Clearing a software reset bit
Prohibition of APIC
Initializing MCHM
Initializing ICHM
Initializing Super I/O
Initializing debug port
Dummy read of 3
Setting of printer port (Only for the model supporting PRT)
Initializing the CH0 of a PIT (For HOLD_ON)
Initializing flags determining whether BIOS is rewritten
CHECK SUM CHECK
Switching to protected mode
Examining the checksum of Boot Block
(Skip when returned to S3)
Examining the checksum of other data in a flash memory
(Skip when returned to S3)
EC/KBC rewrite check
BIOS rewrite when "rewrite" is requested
Transition of the process to System BIOS IRT when
returned to S3
Key input
When inputting key, [
[TAB] key check
Checking whether BIOS rewrite is requested
CheckSum error except Boot Block
when rewrite is requested by user
Transition to BIOS rewrite
Transition to System BIOS IRT
Initializing ICHM.D31
DRAM Configuration
Enabling L1 cache
Clearing memory
Transferring to real mode and copy BIOS to RAM

2 Troubleshooting Procedures

Details
rd
Bus data
], [ ],
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