Toshiba PORTEGE M300 Maintenance Manual page 73

2.4 System Board Troubleshooting
D port status
F102h Cache configuration
Permission of cache
CMOS access test
(Only when Cold booting)
COMS battery level check
CMOS Check sum check
CMOS data initialization (1)
IRT status setting
Storing of DRAM size
F103h Resume branch check
In the case of CMOS error, no resume
occurs.
If "resume status code" is not set, no
resume occurs.
Resume error check
ICH4-M Power Failure Error
SM-RAM checksum error
Memory configuration change check
Checksum of system BIOS RAM area
Go go resume process (RESUME_MAIN)
Resume error process
Prohibition of all SMI
Clears resume status
Return to ROM.
Forwards the area of C0000h to EFFFFh
to PCI
Set resume error request
Copying ROM/RAM of system BIOS
Resume error process
2-24
Table 2-4 Debug port error status (3/7)
Inspection items
2 Troubleshooting Procedures
Details
(Only for L1 cache)
Program halt when error
Setting "Boot status" and "IRT busy
flag" and "0" to the remaining bits.
(Only when cold booting)
(Resume error 7AH)
(Resume error 73H)
(Resume error 73H)
(Resume error 79H)
(Prohibition of DRAM)
(Program halt when error)
Return CPU clock in low
Prohibition of all SMI
Resume status Clear
Return to ROM
Forwards the area of C0000h to
EFFFFh to PCI
PORTEGE M300 Maintenance Manual (960-504)