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12.2
BIOS POST codes
The section below lists the POST codes relevant to users in chronological order of
occurrence: Contact Customer Support for information on all other POST codes.
Display
(hex)
16H
28H
2AH
2CH
2EH
30H
38H
3AH
22H
3CH
49H
55H
4AH
5CH
60H
62H
90H
95H
98H
BCH
00H
SIMATIC Rack PC 847B
Operating Instructions, 06/2008, A5E02203168-01
Meaning
TP_CHECKSUM
TP_SIZE_RAM
TP_ZERO_BASE
TP_ADDR_TEST
TP_BASERAML
TP_BASERAMH
TP_SYS_SHADOW
TP_CACHE_AUTO
TP_8742-TEST
TP_ADV_CS_CONFIG
TP_PCI_INIT
TP_USB_INIT
TP_VIDEO
TP_MEMORY_TEST
TP_EXT_MEMORY
TP_EXT_ADDR
TP_FDISK
TP_CD
TP_ROM_SCAN
TP_PARITY
Interrupt, error and system messages
Description
BIOS checksum test
Determine DRAM size
Set base RAM 64KB to 0
Check address busses
BaseRam Low
BaseRam High
BIOS is copied to DRAM
Determine processor cache Replace the processor
Test the keyboard
controller
Configure the advanced
chipset
Initialize the PCI interface
Activation of the USB
hardware
Initialize the video interface
System memory test
System memory test
Address bus test
Initialization and test of the
hard disk hardware
Initialization and test of the
CD hardware
Search for BIOS
expansions
Test of memory modules
BIOS POST completed.
Loading operating system
12.2 BIOS POST codes
To correct or avoid errors
Service event
Replace the memory modules
Replace the memory modules
Replace the memory modules
Replace the memory modules
Replace the memory modules
Replace the memory modules
Check whether the keyboard is
connected or defective
Run a test by disabling the
hardware components in Setup
Run a test by disabling the
hardware components in Setup, or
by removing the expansion
modules installed on the bus
module
Removal of USB devices
Replace the memory modules
Replace the memory modules
Replace the memory modules
Disconnect the HDD, replace it if
necessary
Disconnect the CD-ROM drive,
replace it if necessary
Run a test by disabling the
hardware components in Setup, or
by removing the expansion
modules installed on the bus
module
Replace the memory modules
107
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