Toshiba Satellite R10 Maintenance Manual page 78

2.4 System Board Troubleshooting
Table 2-3 Debug port (Boot mode) error status (3/9)
D port status
(00h) Initialization of H/W (before DRAM
recognition)
Initialization of PIT channel 1
01h
Checking DRAM type and size (at
cold boot)
Testing the stack area of SM-RAM
02h Configuring cache memory
Permission of L1/L2 cache
memory
Checking the access of a CMOS
(Only in Cold Boot)
Examining the battery level of
CMOS
Checksum check of CMOS
Initializing data in CMOS (1)
Setting up of IRT status
Storing the size of DRAM
03h Branch of resuming (only in Cold
Boot)
2-24
Inspection items
2 Troubleshooting Procedures
Details
Initialization of MCHM
Initialization of ICH4M.D31.Func0
Initialization of ICH4M.D31.Func1
Initialization of USB.Func0,1,2,7
Initialization of ICH4M.D31.Func3
Initialization of ICH4M.D31.Func5
Initialization of TI
(Setting the refresh interval to "30µs")
When unsupported memory is connected,
the system beeps and halts.
When DRAM size = 0, halts.
When it can not be used as stack area,
halts.
When error is detected, halts
(Setting of boot status and IRT busy flag,
The rest bits are set to 0)
When a CMOS error is detected, it does
not resume.
If "resume status code" is not set, no
resume occurs.
Satellite R10 Maintenance Manual (960-509)