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2 Troubleshooting Procedures 2.4 System Board Troubleshooting
2-22 PORTEGE A200 Maintenance Manual (960-499)
Table 2-5 Debugging port status (3/7)
D port
status
Contents
F103h Resume branch (in COLD boot only)
No resume at CMOS error
No resume, if resume status code is not set.
Checks for resume error.
ICH4-M Power Failure error? Resume error 7Ah
Checks checksum of SM-RAM.? Resume error 73H
Checks change of memory configuration.? Resume error 73H
Checks checksum of RAM area of system BIOS. ? Resume error 79H
Goes to resume process (RESUME_MAIN).
Resume error process
Forbids all SMIs.
Clears resume status.
Returns to ROM.
Forwards the area of C0000h~ EFFFFh to PCI. (Forbids DRAM)
Sets resume error factors.
Copies ROM/RAM of system BIOS. ? halts at error.
F104h Initializes SM RAM.
Checks WakeUp factor.
Rewrites on SM RAM base and stores CPU state map.
Permits only SMI by ASMI.