127
Checkpoint Code | Description |
|
|
49h | The amount of memory below 1 MB has been |
| found and verified. Determining the amount of |
| memory above 1 MB memory next. |
|
|
4Bh | The amount of memory above 1 MB has been |
| found and verified. Checking for a soft reset and |
| clearing the memory below 1 MB for the soft reset |
| next. If this is a power on situation, going to |
| checkpoint 4Eh next. |
|
|
4Ch | The memory below 1 MB has been cleared via a |
| soft reset. Clearing the memory above 1 MB next. |
|
|
4Dh | The memory above 1 MB has been cleared via a |
| soft reset. Saving the memory size next. Going to |
| checkpoint 52h next. |
|
|
4Eh | The memory test started, but not as the result of a |
| soft reset. Displaying the first 64 KB memory size |
| next. |
|
|
4Fh | The memory size display has started. The display is |
| updated during the memory test. Performing the |
| sequential and random memory test next. |
|
|
50h | The memory below 1 MB has been tested and |
| initialized. Adjusting the displayed memory size for |
| relocation and shadowing next. |
|
|
51h | The memory size display was adjusted for |
| relocation and shadowing. Testing the memory |
| above 1 MB next. |
|
|
52h | The memory above 1 MB has been tested and |
| initialized. Saving the memory size information |
| next. |
|
|
53h | The memory size information and the CPU registers |
| are saved. Entering real mode next. |
|
|
54h | Shutdown was successful. The CPU is in real mode. |
| Disabling the Gate A20 line, parity, and the NMI |
| next. |
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|
