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