Troubleshooting (DPO7000 Series, MSO70000/C Series, DSA/DPO70000B/C Series)
Table 4-12: 039
-0185-xx μATX POST codes
Item no . Module
Displayed POST
code Description
OEM Specific-Cache control cache
Processor Status (1FLAGS) Verification.
Tests the fo
llowing processor status flags: Carry, zero, sign,
overflow.
The BIOS sets each flag and verifies that they are set, then
turns each fl
ag off and verifies that it is off.
1
Turn Off Chipset and
CPU test
C0
Read/Writ
e/Verify all the CPU registers except SS, SP, and BP
with data pattern FF and 00.
RAM must be periodically refreshed to keep the memory from
decaying
. This function ensures that the memory refresh
function is working properly.
2 Memory Pr
esence
C1
First blo
ck memory detect
OEM S pecific-Test to size on-board memory
Early chip set initialization
Memory p
resence test
OEM chip set routines
Clear low 64K of memory
Test fir
st 64K memory
3 Early Memory
Initia
lization
C2 OEM Spe
cific-Board Initialization
4 Extend Memory DRAM
selec
t
C3 OEM Sp
ecific-Turn on extended memory
Initialization
Cyrix CPU initialization
Cache
initialization
5
Spec
ial Display
Handling
C4 OEM S
pecific-Display/Video Switch
Handling so that the Switch H andling display switch errors
never occur
6
Early Shadow C5 OEM specific-Early shadow enable for fast boot
7
Cache presence test C6
External cache size detection
8
CMOS Check C F CMOS checkup
9
Spurious
B0
If interrupt occurs in protected mode.
10 Unclaimed NMI B1
If unmasked NMI occurs, display
P
ress F1 to disable NMI, F2 reboot.
11
Program Chip Set
BF
To program chipset from defaults values
MSO70000/C, DSA70000B/C, DPO70000B/C, D PO7000, MSO5000, DPO5000 Series 4–31
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