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POST Code
22
23
24
25
26
27
28
29
2A
2B
2C
2D
2E
2F
30
31
32
33
34
35
36
37
38
39
3A
3B
3C
3D
3E
3F
40
41
42
73
Macro Name
DEBUG_POST_CHECK_CMOS_RA
M
DEBUG_POST_TEST_BATT_CMOS_
SUM
DEBUG_HWIO_TEST_DMA_CTLRS
DEBUG_HWIO_INIT_8237
DEBUG_POST_INIT_VECS
DEBUG_RAM_QUICK_SIZE
DEBUG_RAM_PROT_ENTRY_1
DEBUG_RAM_SIZE_DONE
DEBUG_RAM_PROT_EXIT
DEBUG_CS_SHADOW_SETUP
DEBUG_VIDEO_EQUIP_INIT_INIT
DEBUG_VIDEO_BW_SEARCH
DEBUG_VIDEO_COLOR_SEARCH
DEBUG_VIDEO_SIGNON
DEBUG_OEM_CONFIG_KBD_CTL
DEBUG_KEYB_PRESENT_TEST
DEBUG_KEYB_TEST_IRQ1
DEBUG_KEYB_TEST_CMD
DEBUG_RAM_FULL_TEST
DEBUG_RAM_PROT_ENTRY_2
DEBUG_RAM_TEST_DONE
DEBUG_RAM_PROT_EXIT_2
DEBUG_KEYB_OUTPUT_PORT
DEBUG_CS_CACHE_SETUP
DEBUG_HWIO_TEST_PERIODIC
DEBUG_GEN_CHECK_RTC
DEBUG_GEN_INIT_HARD_VECS
DEBUG_MOUSE_INIT
DEBUG_KEYB_SET_LEDS_1
DEBUG_OEM_DEVICE_CONFIG
DEBUG_CS_CONFIG_PORTS
DEBUG_FLOP_INIT
DEBUG_WINI_INIT
Description
Send test petten to Check CMOS Ram
Test Battery Fail & check CMOS X-SUM
Use DMA to copy data for Test the DMA
controllers
Initialize 8237A Controller
Install and Initialize interrupt Vectors
Enter memory protect mode, use change RAM
bank to do RAM Quick Sizing
Memory protected mode entered safely
Test the basic 640k ram , RAM test completed
Protected mode exit successful
Shadow system and video BIOS to RAM, if
CMOS requests shadow
Going To Initialize 6845 CRT controllor
Search For Monochrome Adapter
Search For Color Adapter
Signon messages displayed
For special initialize of keyboard controller
Test the keyboard controllor , If Keyboard
Present
Clear keyboard buffer and send keyboard
command to test Keyboard Interrupt
Send keyboard command to turn off keyboard
LED
and Test some Keyboard Command Byte
TEST memory procedure, for test, blank and
count all RAM
Eneter the memory protected mode for test all
expand memory
Test and blank all memory complete
Switch the memory from Protected mode to real
mode
Disable A20 status for memory test finish
Setup Cache Controller
Check and test the timer 0 interrupt function is
Working
test for RTC ticking
Install and initialize the hardware vectors
Clear keyboard buffer for search and Init the
Mouse
Send keyboard command to Update keyboard
NUMLOCK status
special init of COMM and LPT ports
Configure the COMM and LPT ports
According cmos data to initialize the floppies
Scan and initialize the hard disk, and display the
result n crt
Chapter 4
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