Toshiba Satellite M20 Maintenance Manual page 54

2 Troubleshooting
Table 2-2
LED Status
(Hexadecimal)
40H DEBUG_CS_CONFIG_PORTS
41H DEBUG_FLOP_INIT
42H DEBUG_WINI_INIT
43H DEBUG_HWIO_ROM_INIT
44H DEBUG_OEM_INIT_POWER_MAN
45H DEBUG_KEYB_SET_LEDS_2
46H DEBUG_HWIO_FIND_80X87
47H DEBUG_OEM_LAST_MINUTE_INIT Run OEM functions before boot, and enable
48H DEBUG_MISC_LAUNCH_INT19
49H DEBUG_BEGIN_BOOT_CODE
50H DEBUG_ACPI_INIT
51H DEBUG_PM_CPU_INIT
52H DEBUG_USB_HC_INIT
2-16
Printer port LED boot mode status (3/3)
Test Item
Configure the COMM and LPT ports
According cmos data to initialize the floppies
Scan and initialize the hard disk, and display the result
on crt
Search option rom from c800 to e000 and to Initialize
option ROMs
Check special device initial power management function
Clear keyboard buffer and Update NUMLOCK status
Test For Coprocessor Installed,and enable
coprocessor interrupt
L1,L2 cache
Post code will finish,ready to run int19
and load OS
Into Int19, to boot from floppy or other
boot device
Initialize the ACPI function
Power manager initial & GEYSERVILLE CPU
initialize
Clear USB status register and Initiallize
the USB Hub controllor
2.4 System Board
Description
Satellite M20 Maintenance Manual