Service Manual Information
Table 1: 039-0185-xx μATX POST codes, (cont.)
Item no . Module
Displayed POST
code Description
Reserved 38
Test DMA Page
Registers
39 Test DMA Page Registers.
Reserved 3A
Reserved 3B
Test Timer Counter 2 3C Test 8254 Timer 0 Counter 2.
Reserved 3D
Test 8259-1 Mask Bits 3E
Verify 8259 Channel 1 masked interrupts by alternately turning
off and on the interrupt lines.
Reserved 3F
Test 8259-2 Mask Bits 40
Verify 8259 Channel 2 masked interrupts by alternately turning
off and on the interrupt lines.
Reserved 41
Reserved 42
Test Stuck 8259’s
Interrupt Bits
Test 8259 Interrupt
Functionality
43
Turn off interrupts then verify no interrupt mask register is on.
Force an interrupt and verify the interrupt occurred.
Reserved 44
Reserved 45
Reserved 46
Set EISA Mode
47
If EISA non-volatile memory checksum is good, execute EISA
initialization.
If not, execute ISA tests an clear EISA mode flag.
Reserved 48
Size Base and Extended
Memory
49
Size base memory from 256 K to 640 K and extended memory
above 1 MB.
Reserved 4A
Reserved 4B
Reserved
4C
Reserved 4D
Test Base and Extended
Memory
4E
Tes t b ase mem ory from 256K to 640K and extend ed m e mory
above 1 MB using various patterns.
NOTE. This test is skipped in EISA mode and can b e skipped
with ESC key in ISA mode.
Reserved 4F
USB init
50
Initialize USB controller
12
Reserved 51
20 TDS5000B Read This First
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