| Code | Description |
|
2A | Bus initialization system, static, output devices will be done next, if |
| present. |
2B | Passing control to the video ROM to perform any required |
| configuration before the video ROM test. |
2C | To look for optional video ROM and give control. |
2D | The video ROM has returned control to BIOS POST. Performing any |
| required processing after the video ROM had control. |
2E | Completed |
| is not found, performing the display memory read/write test next. |
2F | EGA/VGA not found. Display memory R/W test about to begin. |
30 | Display memory R/W test passed. Look for retrace checking next. |
31 | Display memory R/W test or retrace checking failed. To do alternate |
| display retrace checking. |
32 | Alternate display memory R/W test passed. To look for the alternate |
| display retrace checking. |
34 | Video display checking is over. Setting the display mode next. |
37 | The display mode is set. Displaying the power on message next. |
38 | Initializing the bus input, IPL, and general devices next, if present. |
39 | Displaying bus initialization error message. |
3A | The new cursor position has been read and saved. Displaying the Hit |
| <DEL> message next. |
40 | Preparing the descriptor tables next. |
42 | Entering protected mode for the memory test next. |
43 | Entered protected mode. Enabling interrupts for diagnostics mode |
| next. |
44 | Interrupts enabled if the diagnostics switch is on. Initializing data to |
| check memory wraparound at 0:0 next. |
45 | Data initialized. Checking for memory wraparound at 0:0 and finding |
| the total System memory size next. |
46 | The memory wraparound test has completed. The memory size |
| calculation has been done. Writing patterns to test memory next. |
47 | The memory pattern has been written to extended memory. Writing |
| patterns to the base 640 KB memory test. |
48 | Patterns written in base memory. Determining the amount of memory |
| below 1MB next. |
49 | The amount of memory below 1MB has been found and verified. |
| Determining the amount of memory above 1MB memory next. |
