Tektronix DPO70000C/DX Series Service Manual

Troubleshooting (MSO/DPO5000 Series)
Table 4-20: BIOS POST codes: ECM-945GM Series (cont.)
Module
Displayed
POST code Description
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
Turn off interrupts then verify no interrupt mask register is on.
Test 8259 Interrupt
Functionality
43
Force an interrupt and verify the interrupt occurred.
Reserved 44
Reserved 45
Reserved 46
Set EIS A Mode
47
If EISA non-volatile memory checksum is good, execute EISA initialization.
If not, execute ISA tests and clear EISA mode flag.
Reserved 48
Size Base and
Extended Memory
49
Size base memory from 256K to 640K and extended memory above 1 M B.
Reserved 4A
Reserved 4B
Reserved
4C
Reserved 4D
Test Base and
Extended Memory
4E
Test base memory from 256K to 640K and extended memory 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
Reserved 51
Memory Test 52
Test all memory of memory above 1 MB using Virtual 8086 mode, page mode, and
clear the memory
Reserved 53
Reserved 54
CPU display
55
Detect CPU speed and display CPU vendor- specific version string and turn on all
necessary CPU features
Reserved 56
MSO70000/C, DSA70000B/C, DPO70000B/C, D PO7000, MSO5000, DPO5000 Series 4–55

Tektronix DPO70000C/DX Series Specifications

General

Brand	Tektronix
Model	DPO70000C/DX Series
Category	Test Equipment
Language	English