Toshiba Tecra A8 Maintenance Manual page 76

2 Troubleshooting Procedures
Table 2-4-1 Debug port (Boot mode) error status (4/9)
D port status
Resume error process
Copying ROM/RAM of system BIOS
F104
Security check
F105
SMRAM initialization
APIC initialization
WakeUp factor check
SMRAM base rewriting and CPU
state map saving for BIOS
Permission of SMI based on ASMI
Initialization of devices which need
F106
initialization before PCI bus
initialization
CPU clock measurement
Check of parameter block A
Permission of SMI except auto-off
function
Judgment of destination (country)
from DMI data
2-28 [CONFIDENTIAL]
Inspection items
TECRA A8 /Satellite Pro A120 Maintenance Manual (960-573)
2.4 System Board Troubleshooting
Details
Transition to RESUME-MAIN
Reset of CPU clock to low
Prohibition of all SMI
Clearance of resume status
Return to ROM
Turning area of C0000h to EFFFFh to PCI
(Prohibition of DRAM)
Setting of resume error request
(HLT, when error occurs)
PIT test (Cold boot only) and initialization
Setting of test pattern to channel 0 of PIT#0
Check whether the set test pattern can be read
Initialization of PIT channel 0
(Setting of timer interruption interval to 55ms)
Initialization of PIT channel 2
(Setting of the sound generator frequency to
664Hz)
Test of PIT channel 1 (Check whether the refresh
signal works normally in 30 micro-s refresh
interval) HLT, when the time is out
Test of PIT channel 2
(Check whether the speaker gate works
normally)