Toshiba Tecra A8 Maintenance Manual page 83

2.4 System Board Troubleshooting
Table 2-4-2 Debug port (Boot mode) error status (2/9)
D port status
F009
Saving key scan code
Setting of TASK_1ms_TSC
FAN control
Initialization of sound
When request BIOS, EC/KBC
rewriting
When BIOS renewal is prohibited
When BIOS ROM is abnormal
Key input
Reading CHGBIOSA.EXE /
CHGFIRMA.EXE
F100
Prohibition of cache
Permission of L1/L2 cache in Flash
ROM area
Renewal of microcode
TECRA A8 /Satellite Pro A120 Maintenance Manual (960-573)
Inspection items
2 Troubleshooting Procedures
Details
Clears mute
Blinks green (cycle:2s, on:1s, off:1s)
Blinks orange (cycle: 8s(On:4s,Off:4s), beeps for
30s and holts (DPORT=F00BH))
Blinks orange (cycle: 2s(On:1s,Off:1s))
Prohibition of USB
Beep
Waiting for key input
FDC reset
Setting parameters for 2HD(1.44MB)
Reading of first sector, If it is the data of 1.44MB
(2HD), the media type is definite.
Setting of parameters for 2DD (720KB)
Retrieval of "CHGBIOSA.EXE" from the root
directory.
Directory start header and calculates the sector
Read 1 sector of the root directory
Retrieval of entry of "CHGBIOSA.EXE"
/"CHGFIRMA.EXE" from the sector read.
Reading of EXE header of "CHGBIOSA.EXE" and
"CHGFIRMA.EXE" Key input when error occurred
Execution of "CHGBIOSA.EXE" and
"CHGFIRMA.EXE"
[CONFIDENTIAL] 2-35