Toshiba TECRA S1 2.4 System Board 2 Troubleshooting , Table 2-2 Printer port LED boot mode status (2/3)

2.4 System Board 2 Troubleshooting

Table 2-2 Printer port LED boot mode status (2/3)

20H DEBUG_KEYB_SELFTEST_CTLR Send selftest command (AAH) to test Keyboard

controll or if o. k. r eturn (55h)

21H DEBUG_K EYB_ RESET_KEY BOARD Test Keyboard Control ler and i nit ialize keyboard

controll or

22H DEBUG_POST_CHECK_CMOS_RAMSend test petten to Check CMOS Ram

23H DEBUG_POST_TEST_BATT_CMOS_

Test Battery Fail & check CMOS X-SUM

24H DEBUG_HWIO_TEST_DMA_CTLRS Use DMA to copy data for Test the DMA controllers

25H DEBUG_HWI O_I NI T_8237 I ni ti ali ze 8237A Contr oll er

26H DEBUG_POST_INIT_VECS Install and Iniitialize interrupt Vectors

27H DEBUG_RAM _QUI CK _SIZE Enter memory pr otect mode,use change RA M bank to

do RAM Quick Sizi ng

28H DEBUG_RAM _PROT_EN TRY_ 1 Memory pr otected mode enter ed safely

29H DEBUG_RAM_SIZE_DONE Test the basic 640k ram,RAM t est compl eted

2AH DEBUG_RAM_ PROT_EXI T Prot ected mode exi t successful

2BH DEBUG_CS_SHADOW_SETUP Shadow system and video BIOS to RAM if CMOS

requests shadowSetup Shadow

2CH DEBUG_VIDEO_ EQUIP_I NI T_I NI T Going T o Ini t ial ize 6845 CRT cont rollor

2DH DEBUG_VIDEO_ BW_SEA RCH Search For Monochr ome Adapter

2EH DEBUG_VI DEO_COLOR_ SEARCH Search For Col or A dapter

2FH DEBUG_VI DEO_SI GNON Signon messages displayed

30H DEBUG_OEM_ CONFIG_ KBD _CTL For special i nit ial ize of keyboard c ontrol l or

31H DEBUG_KEYB_PRESENT_TEST Test the keyboard controllor ,If Keyboard

Present

32H DEBUG_K EYB_ TEST_I RQ1 Cl ear keyboard buff er and sen keyboard command

to test Keyboard Interrupt

33H DEBUG_KEYB_TEST_CMD Send keyboard command to turn off keyboard LED

and Test some Keyboard Command By te

34H DEBUG_RAM _FUL L_ TEST TEST memory procedure, for test, blank and

count all RA M

35H DEBUG_RAM_PROT_ENTRY_2 Eneter the memory protected mode for test all expand

memory

36H DEBUG_RAM _TEST_ DONE Test and blank all memory complete

37H DEBUG_RAM_PROT_EXIT_2 Switch the memory from Protected mode to real mode

38H DEBUG_KEYB_OUTPUT_PORT Disable A20 status for memory test finish

39H DEBUG_CS_CACH E_SETUP Setup Cache Controll er

3AH DEBUG_HWIO_TEST_PERIODIC Check and test the timer 0 interrupt functi on i s Wor ki ng

3BH DEBUG_GEN_CHECK_RTC test for RTC ticking

3CH DEBUG_GEN_INIT_HARD_VECS Install and initialize the hardware vectors

3DH DEBUG_MOUSE_INIT Clear keyboard buffer for search and Init the Mouse

3EH DEBUG_KEYB _SET_L EDS_1 Send keyboard command to Update keyboar d NUM LOCK status

3FH DEBUG_OEM_DEVICE_CONFI

special init of COMM and LPT ports