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AMI- 2.2x | WinBIOS | PlusBIOS
AWARD- 4-5x PnP
Phoenix- v4.0 | v4.0 Release6
Compaq- General
Dell- General
HP- Vectra | Vectra ES | Vectra QS/RS | Pavilion Series 3100 & 8000
IBM- IBM AT | IBM PS/2
Intel-

Compaq Post Codes:

0 1 2 3 4 5 6 7 8 9 A B C D E F

Code Meaning
00 Initialize flags, MSW,IDTLIN
01 Read manufacturing jumper
02 8042 received read command
03 No response from 8042
04 Look for ROM at E000
05 Look for ROM at C800
06 Normal CMOS reset code
08 Initialize 8259,80287
09 Reset code in CMOS byte
0A Vector vis 40:67 reset function
0B Vector vis 40:67 with E01 function
0C Boot reset function
0D Test #2 8254 PIT counter 0
0E Test #2 8254 PIT counter 2
0F Warm boot
10 PPI disabled, test 8254 PIT's 0 and 1
11 Initialize (blast) VDU controller
12 Clear screen; turn ON video
13 Test time 0
14 Disable RTC interrupts
15 Check battery power
16 Battery has lost power
17 Clear CMOS Diags.
18 Test base memory (First 128K)
19 Initialize base memory
1A Initialize VDU adapters
1B The system ROM
1C CMOS checksum
1D DMA controller/page registers
1E Test keyboard controller
1F Test 286 protected mode
20 Test real and extended memory
21 Initialize time-of-day
22 Initialize 287 coprocessor
23 Test the keyboard and 8042
24 Reset A20, set default CPU speed
25 Test diskette subsystem
26 Test fixed disk subsystem
27 Initialize parallel printer
28 Perform search for optional ROM's
29 Test valid system configuration
2A Clear screen
2B Check for invalid time and date
2C Optional ROM search
2D Test timer 2
2F Write to diagnostic byte
30 Clear first 128K bytes of RAM
31 Load interrupt vectors 70-77
32 Load interrupt vectors 00-1F
33 Initialize MEMSIZE and RESETWD
34 Verify CMOS checksum
35 CMOS checksum is not valid
36 Check battery power
37 Check for game adapters
38 Check for Serial ports
39 Check for parallel printer ports
3A Initialize port and comm time-outs
3B Flush keyboard buffer
40 Save RESETWD value
41 Check RAM refresh
42 Start write of 128K RAM test
43 Reset parity checks
44 Start verify of 128K RAM test
45 Check for parity errors
46 NO RAM errors
47 RAM error detected
50 Check for dual frequency in CMOS
51 Check CMOS VDU configuration
52 Start VDU ROM search
53 Vector to VDU option ROM's
54 Initialize first display adapter
55 Initialize second display adapter
56 No display adapters installed
57 Initialize primary VDU mode
58 Start of VDU test (each adapter)
59 Check existence of adapter
5A Check VDU registers
5B Start screen memory test
5C End test of adapter, clear memory
5D Error detected on an adapter
5E Test the next adapter
5F All adapters successfully tested
60 Start of memory tests
61 Enter protected mode
62 Start memory sizing
63 Get CMOS size
64 Start test of real memory
65 Start test of extended memory
66 Save size memory (base, ext)
67 128K-option installed CMOS bit
68 Prepare to return to real mode
69 Back in real mode-successful
6A Protected mode error during test
6B Display error message
6C End of memory test
6D Initialize KB OK string
6E Determine size to test
6F Start MEMTEST
70 Display XXXXXKB OK
71 Test each RAM segment
72 High order address test
73 Exit MEMTEST
74 Parity error on bus
75 Start protected mode test
76 Prepare to enter protected mode
77 Test software exceptions
78 Prepare to return to real mode
79 Back in real mode-successful
7A Back in real mode-error occurred
7B Exit protected mode
7C High order address test failure
7D Entered cache controller test
7E Programming memory cache
7F Copy system ROM to high RAM
80 Start of 8042 test
81 Do 8042 self test
82 Check result received
83 Error result
84 OK 8042, Init mode=5D
86 Start test, reset keyboard
87 Got acknowledge, read result
88 Got result, check it
89 Test for stuck keys
8B Test keyboard interface
8A Key seems to be stuck
8C Got result, check it
8D End of test, no errors
90 Start of CMOS test
91 CMOS seems to be OK
92 Error on CMOS read,write test
93 Start of DMA controller test
94 Page registers seem to be OK
95 DMA controller is OK
96 8237 initialization is complete
97 Start of NCA RAM test
A0 Start of diskette tests
A1 FDC reset active (3F2h Bit 2)
A2 FDC reset inactive (3F2h Bit 2)
A3 FDC motor on
A4 FDC time-out error
A5 FDC failed reset
A6 FDC passed reset
A8 Start to determine drive type
A9 Seek operation initialized
AA Waiting for FDC seek status
AF Diskette tests complete
B0 Start of fixed drive tests
B1 Combo board not found-exit
B2 Combo controller failed-exit
B3 Testing drive 1
B4 Testing drive 2
B5 Drive error (error condition)
B6 Drive failed (failed to respond)
B7 No fixed drives-exit
B8 Fixed drive tests complete
B9 Attempt to boot diskette
BA Attempt to boot fixed drive
BB Boot attempt failed FD/HD
BC Jump to boot record
BD Drive error, retry booting
BE Weitek coprocessor test
D0 Entry to clear memory routine
D1 Ready to go to protected mode
D2 Ready to clear extended memory
D3 Ready to reset back to real mode
D4 Back in real mode
D5 Clear base memory
DD Built-in self-test failed
E0 Ready to replace E000 ROM
E1 Completed E000 ROM replacement
E2 Ready to replace EGA ROM
E3 Completes EGA ROM replacement
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