| 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 |