Toshiba M200 - Portege - Pentium M 1.5 GHz, Maintenance Manual

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2.4 System Board Troubleshooting 2 Troubleshooting
Portege M200 Maintenance Manual (960-457) 2-23
Table 2-3 D port status (2/7)
D port
status
Details Remarks
Key inputting
Loading CHGBIOSA.EXE and
CHGFIRMA.EXE
Resetting FDC
Setting parameter for 2HD (1.44MB) and
transmission rate
Reading the first sector When it is sector for 2HD, media
type is determined.
Setting parameter for 2DD (720KB)and
transmission rate
Searching CHGBIOSA.EXE in the root
directory
Calculating start head and sector of directory
Reading contents of root directory by one
sector
Searching entry of “CHGBIOSA.EXE ”/
“CHGFIRMA.EXE ” in the sector
Reading EXE header of “CHGBIOSA.EXE ”/
“CHGFIRMA.EXE ” If error occurs, process goes to
key input.
F009h
Executing CHGBIOSA.EXE and
CHGFIRMA.EXE
F100h Disabling cache
Initializing special registers
Initializing Ch1 of a PIT
(Refresh interval
->30 micro seconds)
Checking size and type of DRAM (on Cold
Booting)
Checking DRAM size HALT when DRAM size is 0.
F101h
Testing stack area of SMRAM HALT when it can be used as
stack area.