NEC 120Mf, 5800 manual POST Codes, Troubleshooting, Reason

4-9 Troubleshooting

POST Codes

The code displayed using the postcard is shown below.

CP	Reason
01	Initialize BMC
02	Verify Real Mode
03	Test BMC
04	Get Processor type
06	Initialize system hardware
08	Initialize chipset registers with initial POST values
09	Set in POST flag
0A	Initialize Processor registers
0B	Enable Processor cache
0C	Initialize caches to initial POST values
0E	Initialize I/O
0F	Initialize the local bus IDE
10	Initialize Power Management
11	Load alternate registers with initial POST values
12	Restore Processor control word during warm boot
13	Initialize PCI Bus mastering devices
14	Initialize keyboard controller
16	BIOS ROM checksum
17	Initialize external cache before memory autosize
18	8254 timer initialization
1A	8237 DMA controller initialization
1C	Reset Programmable Interrupt Controller
20	Test DRAM refresh
22	Test 8742 Keyboard Controller
24	Set ES segment register to 4GB
28	Autosize DRAM, system BIOS stops execution here if the BIOS does not detect any
	usable memory DIMMs
29	Initializes the POST Memory Manager
2A	Clear 8 MB base RAM
2C	Base RAM failure, BIOS stops execution here if entire memory is bad
2E	Test the first 4MB of RAM
2F	Initialize external cache before shadowing
32	Test Processor bus-clock frequency
33	Initializes the Phoenix Dispatch Manager
34	Test CMOS
35	RAM Initialize alternate chipset registers
36	Warm start shut down
37	Reinitialize the chipset
38	Shadow system BIOS ROM
39	Reinitialize the cache
3A	Autosize cache
3C	Configure advanced chipset registers
3D	Load alternate registers with CMOS values
41	Check unsupported processor
40	Set Initial Processor speed new
42	Initialize interrupt vectors