| CP Code | Routine | Boot Mode |
|---|---|---|
| 01 | Its_A_Reset | Cold+Warm+Restore+Mfg+SAD |
| 0D | Init Chip_NS | Cold+Warm+Restore+Mfg+SAD |
| 12 | Periph Init | Cold+Warm+Restore+Mfg+SAD |
| 03 | Disable Video | Cold+Warm+Restore+Mfg+SAD |
| 05 | Phase 1 Enter Big Real | Cold+Warm+Restore+Mfg+SAD |
| B0 | Enable Local APIC | Cold+Warm+Restore+Mfg+SAD |
| 06 | Cache Init | Cold+Warm+Restore+Mfg+SAD |
| 07 | Init Refresh | Cold+Restore+Mfg |
| 08 | Wait For RTC | Cold+Restore+Mfg |
| 0A | Std CMOS Checksum NS | Cold+Warm+Restore+Mfg |
| 0B | Mid CMOS Checksum NS | Cold+Warm+Restore+Mfg |
| 0C | Ext CMOS Checksum NS | Cold+Warm+Restore+Mfg |
| 0E | C SET_INIT | Cold+Warm+Restore+Mfg+SAD |
| 10 | Check Parity NonParity | Cold+Warm+Restore+Mfg |
| 11 | Disable Parity | Cold+Warm+Restore+Mfg+SAD |
| B1 | Init Seattle | Cold+Restore+Mfg+SAD |
| 13 | Test CPU Regs | Cold+Restore+Mfg |
| 14 | Init RTC | Cold+Warm+Restore+Mfg+SAD |
| 16 | Init Timer 0 | Cold+Warm+Restore+Mfg+SAD |
| 17 | Init Timer 2 | Cold+Warm+Restore+Mfg+SAD |
| 18 | Test DMA | Cold+Warm+Restore+Mfg+SAD |
| 19 | Test Page Regs | Cold+Warm+Restore+Mfg+SAD |
| 1A | Verify Refresh | Cold+Restore+Mfg |
| 1B | Enable Parity | Cold+Warm+Restore+Mfg+SAD |
| 1C | Save ID Warm | SAD |
| 1D | Test First 64k | Cold+Restore+Mfg |
| 1E | Clear First 64k | Cold+Warm+Restore+Mfg |
| 1F | POST with Stack | Cold+Warm+Restore+Mfg+SAD |
| 20 | Enable BIOSE000 | SAD |
| 21 | BIOS Shadow | Cold+Warm+Restore+Mfg |
| B2 | Shadow SCSI | Cold+Warm+Restore+Mfg |
| 23 | Phase 2 POST | Cold+Warm+Restore+Mfg+SAD |
| 24 | Enable BIOS F000 | SAD |
| 24 | Shadow VPD | Cold+Warm+Restore+Mfg |
| 25 | Init Key Board Data | Cold+Warm+Restore+Mfg+SAD |
| 26 | Save ID | Cold+Warm+Restore+Mfg+SAD |
| B3 | Check P54C | Cold+Mfg |
| 27 | Init Q Boot | Cold+Warm+Restore+Mfg |
| 28 | Periph Config | Cold+Warm+Restore+Mfg+SAD |
| 2A | Init Timeout Tables | Cold+Warm+Restore+Mfg+SAD |
| 2B | Pos_Setup | Cold+Warm+Restore+Mfg |
| 2F | Test DMA Locations | Cold+Warm+Restore+Mfg+SAD |
| B4 | Init DMA Regs | Cold+Warm+Restore+Mfg+SAD |
| 30 | Test PICs | Cold+Warm+Restore+Mfg+SAD |
| 31 | Init Vector Table | Cold+Warm+Restore+Mfg+SAD |
| 32 | Enable Timer Int | Cold+Warm+Restore+Mfg+SAD |
| 33 | Init Keyboard | Cold+Warm+Restore+Mfg+SAD |
| 34 | Clear Memory Size Error | Cold+Restore+Mfg |
| 35 | Check Configuration | Cold+Warm+Restore+Mfg |
| 36 | Mfg Boot Fork | Cold+Restore+Mfg |
| 37 | PCI Reset | Cold+Warm+Restore+Mfg |
| B5 | NVRAM check | Cold+Warm+Restore+Mfg |
| 38 | PCI Video | Cold+Warm+Restore+Mfg |
| 3B | Sign On | Cold+Warm+Restore+Mfg |
| 3C | Test Timer Tick | Cold+Restore+Mfg |
| 3F | Enable Video | SAD |
| 40 | CSET BFR SIZMEM | Cold+Warm+Restore+Mfg+SAD |
| 41 | Size Memory Above 64k | Cold+Warm+Restore+Mfg |
| 42 | CSET AFT SIZ MEM | Cold+Warm+Restore+Mfg |
| 43 | Test Timer 2 | Cold+Warm+Restore+Mfg |
| 44 | Password Not Entered | Cold+Restore |
| 45 | Test PS/2 Mouse | Cold+Warm+Restore+Mfg |
| 46 | Check For Mouse Buttons | Cold+Restore |
| 47 | Init Key Board Flags | Cold+Warm+Restore+Mfg+SAD |
| 48 | Test Key Board | Cold+Warm+Restore |
| 4B | Memory Test Prompt | Cold+Warm+Mfg |
| 4C | Test Memory | Cold+Restore+Mfg |
| 4D | Clear EBDA | Warm |
| 4E | CSET AFT M TEST | Cold+Warm+Restore+Mfg |
| 4F | Allocate EBDA | Cold+Warm+Restore+Mfg |
| B6 | Set Planar Info | Cold+Restore+ |
| 50 | xfer ebda vars | Cold+Warm+Restore+Mfg |
| B7 | Init P54M | Cold+Warm+Restore+Mfg |
| B8 | Init MP Structures | Cold+Warm+Restore+Mfg |
| B9 | CPU Speed | Cold+Warm+Restore+Mfg+SAD |
| 51 | Set Warm Boot Flag | Warm |
| 52 | Clear Speed Bits | Cold+Warm+Mfg+SAD |
| 53 | E FLOB | Cold+Warm+Restore+Mfg+SAD |
| 54 | Enable System Interrupts | Cold+Warm+Restore+Mfg+SAD |
| 55 | C2 Security Check | Restore |
| 56 | Init Key Board | Cold+Warm+Restore+SAD |
| 57 | Test RTC | Cold+Warm+Restore+SAD |
| 58 | Check For NPX | Cold+Warm+Restore+Mfg+SAD |
| 59 | reset hdctl | Cold+Warm+Restore+Mfg+SAD |
| 5A | FD INIT | Cold+Warm+Restore+Mfg+SAD |
| 5B | Set Floppy Config | Cold+Warm+Restore+Mfg+SAD |
| BA | Unlock Early | Cold+Restore |
| 5C | Init A20 | Cold+Warm+Restore+Mfg+SAD |
| 5D | Cache Config | Cold+Warm+Restore+Mfg+SAD |
| 5E | HD SETUP | Cold+Warm+Restore+Mfg+SAD |
| 62 | Verify CMOS Config | Cold+Warm+Restore+Mfg |
| 70 | Check For Setup Hot Key | Cold+Warm |
| 63 | Clear Screen | Cold+Warm+Restore+SAD |
| BB | Init IRQ Levels | Cold+Restore |
| 65 | IBM Cirrus DDC | Cold |
| BC | PACP Arbitration | Cold+Warm+Restore+Mfg+SAD |
| BD | Enable Planar SCSI | Cold+Warm+Restore+Mfg+SAD |
| 66 | CSET BFR OPROM | Cold+Warm+Restore+Mfg |
| BE | Do ROM Scan | Cold+Warm+Restore |
| 2C | TCPC | Cold+Warm+Restore+Mfg |
| 49 | TCPC Errors | Cold+Warm+Restore |
| 2D | Find Serial Ports | Cold+Warm+Restore+Mfg |
| 2E | Find Parallel Ports | Cold+Warm+Restore+Mfg |
| 68 | CSET AFT OPROM | Cold+Warm+Restore+Mfg |
| BF | Get MC Data | Cold+Warm+Restore |
| 69 | PCI Configure | Cold+Warm+Restore+Mfg |
| 6A | MFG Hook 65 | MFG |
| 6B | Init Time Of Day | Cold+Warm+Restore+Mfg+SAD |
| 6C | Check For Locked Key Board | Cold+Warm+Restore+SAD |
| 6D | Init Enable NMI | Cold+Warm+Restore+Mfg+SAD |
| 6E | Set Boot Speed | Cold+Warm+Restore+Mfg |
| 6F | Set Key Board LEDs | Cold+Warm+SAD |
| 71 | Init Flush Key Board | Cold+Warm+Restore+SAD |
| 72 | Move Error Log To EBDA | Cold+Warm+Restore+Mfg |
| 73 | Init Disable Mouse | Cold+Warm+Restore+Mfg+SAD |
| 74 | Sys Reset | MFG |
| 75 | Phase 2 Exit Big Real | Cold+Warm+Restore+Mfg+SAD |
| 76 | BOOT STRAP 1 | Cold+Warm+MFG+SAD |
| 78 | SAD BOOT PROC | SAD |
| 79 | Start Boot Sequence | N/A |
| 7A | Read Boot Sector | N.A |
| 7B | Boot Sector Read Complete | N.A |
| 7C | Check for CE Boot Override | N.A |
| 7F | Xfer to boot code | N.A |
The following codes also produce a series of beeps. The series of beeps
are listed for each code followed by an explanation of the code.
CP Code
Beeps
Definition
82
1-1-3
CMOS write/read failure
83
1-1-4
BIOS ROM checksum failure
84
1-2-1
Programmable Interval Timer test failure
85
1-2-2
DMA initialization failure
86
1-2-3
DMA page register write/read test failure
87
1-2-4
RAM refresh verification failure
88
1-3-1
1st 64K RAM test failure
89
1-3-2
1st 64K RAM parity test failure
90
2-1-1
Slave DMA register test in-progress or failure
91
2-1-2
Master DMA register test in-progress or failure
92
2-1-3
Master interrupt mask register test failure
93
2-1-4
Slave interrupt mask register test failure
95
2-2-2
Key-board controller test failure
99
2-3-2
Screen memory test in-progress or failure
9A
2-3-3
Screen retrace tests in-progress or failure
9B
N/A
Search for video ROM in-progress
9C
N/A
Screen believed operable - mode in low two bits
9D
N/A
Screen believed operable - mode in low two bits
9E
N/A
Screen believed operable - mode in low two bits
9F
N/A
Screen believed operable - mode in low two bits
A0
3-1-1
Timer tick interrupt test failure
A1
3-1-2
Interval timer channel 2 test failure
A3
3-1-4
Time-Of-Day clock test failure
A7
3-2-4
Comparing CMOS memory size against actual
A8
3-3-1
Memory size mismatch occurred
D0
N/A
Cache State
D1
N/A
Cache Init
D2
N/A
Cache Restore
D3
N/A
Cache Config
D4
N/A
Cache Flush
D5
N/A
Cache Enable
D6
N/A
Cache Disable
D7
N/A
Cache Custom
e1h
N/A
CSET BFR VIDROM
e5h
N/A
CSET AFT CMCFG
Please see the LEGAL - Trademark notice.
Feel free - send a 
for any BUG on this page found - Thank you.