| Raptor AT – Installation Guide |
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| Checkpoint | Description |
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| Code |
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| 4Eh | The memory test started, but not as the result of a soft | |||
| reset. Displaying the first 64 KB memory size next. | ||||
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| The memory size display has started. The display is | |||
| 4Fh | updated during the memory test. Performing the | |||
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| sequential and random memory test next. |
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| The memory below 1 MB has been tested and | |||
| 50h | initialized. Adjusting the displayed memory size for | |||
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| relocation and shadowing next. |
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| 51h | The memory size display was | adjusted for relocation | ||
| and shadowing. Testing the memory above 1 MB next. | ||||
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| 52h | The memory above 1 MB | has been tested and | ||
| initialized. Saving the memory size information next. | ||||
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| 53h | The memory size information and the CPU registers are | |||
| saved. Entering real mode next. |
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| 54h | Shutdown was successful. The | CPU is in real mode. | ||
| Disabling the Gate A20 line, parity, and the NMI next. | ||||
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| The A20 address line, parity, and the NMI are disabled. | |||
| 57h | Adjusting the memory size depending on relocation and | |||
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| shadowing next. |
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| 58h | The memory size was adjusted for relocation and | |||
| shadowing. Clearing the Hit <DEL> message next. | ||||
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| The Hit <DEL> message is cleared. The <WAIT...> | |||
| 59h | message is displayed. Starting the DMA and interrupt | |||
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| controller test next. |
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| 60h | The DMA page register test passed. Performing the | |||
| DMA Controller 1 base register test next. |
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| 62h | The DMA controller 1 base | register test | passed. | |
| Performing the DMA controller 2 base register test next. | ||||
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| 65h | The DMA controller 2 base | register test | passed. | |
| Programming DMA controllers 1 and 2 next. |
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| 66h | Completed programming DMA controllers 1 | and 2. | ||
| Initializing the 8259 interrupt controller next. |
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| 67h | Completed 8259 interrupt controller initialization. | |||
| 7Fh | Extended NMI source enabling is in progress. |
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| The keyboard test has started. Clearing the output buffer | |||
| 80h | and checking for stuck keys. Issuing the keyboard reset | |||
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| command next. |
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| 81h | A keyboard reset error or stuck key was found. Issuing | |||
| the keyboard controller interface test command next. | ||||
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