Table 4-12: 039-0185-Xx Μatx Post Codes - Tektronix MSO70000 Series Service Manual

Table 4-12: 039-0185-xx μATX POST codes
Item no. Module
1 Turn Off Chipset and
CPU test
2 Memory Presence
3 Early Memory
Initialization
4 Extend Memory DRAM
select
5 Special Display
Handling
6 Early Shadow
7 Cache presence test
8 CMOS Check
9
Spurious
10 Unclaimed NMI
11 Program Chip Set
MSO70000/C, DSA70000B/C, DPO70000B/C, DPO7000, MSO5000, DPO5000 Series
Troubleshooting (DPO7000 Series, MSO70000/C Series, DSA/DPO70000B/C Series)
Displayed POST
code
C0
C1
C2
C3
C4
C5
C6
CF
B0
B1
BF
Description
OEM Specific-Cache control cache
Processor Status (1FLAGS) Verification.
Tests the following processor status flags: Carry, zero, sign,
overflow.
The BIOS sets each flag and verifies that they are set, then
turns each flag off and verifies that it is off.
Read/Write/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.
First block memory detect
OEM Specific-Test to size on-board memory
Early chip set initialization
Memory presence test
OEM chip set routines
Clear low 64K of memory
Test first 64K memory
OEM Specific-Board Initialization
OEM Specific-Turn on extended memory
Initialization
Cyrix CPU initialization
Cache initialization
OEM Specific-Display/Video Switch
Handling so that the Switch Handling display switch errors
never occur
OEM specific-Early shadow enable for fast boot
External cache size detection
CMOS checkup
If interrupt occurs in protected mode.
If unmasked NMI occurs, display
Press F1 to disable NMI, F2 reboot.
To program chipset from defaults values
4–31