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| 191 | |
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Checkpoint | Beep Code | Description | |
Code | |||
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58h | Test for unexpected interrupts. First do an | ||
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| STI for hot interrupts. Secondly, test the NMI | |
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| for an unexpected interrupt. Thirdly, enable | |
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| the parity checkers and read from memory, | |
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| checking for an unexpected interrupt. | |
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59h |
| Register POST Display Services, fonts, and | |
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| languages with the POST Dispatch Manager. | |
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5Ah |
| Display prompt “Press F2 to enter SETUP.” | |
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5Bh |
| Disable CPU cache. | |
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5Ch |
| Test RAM between 512K and 640K. | |
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60h |
| Determine and test the amount of extended | |
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| memory available. Determine if memory | |
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| exists by writing to a few strategic locations | |
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| and see if the data can be read back. If so, | |
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| perform an | |
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| on the memory. Save the total extended | |
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| memory size in the CMOS at cmosExtended. | |
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62h |
| Perform an address line test on A0 to the | |
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| amount of memory available. This test is | |
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| dependent on the processor, since the test | |
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| will vary depending on the width of mem- | |
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| ory (16 or 32 bits). This test will also use A20 | |
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| as the skew address to prevent corruption | |
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| of the system memory. | |
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64h |
| Jump to UserPatch1. See "The POST Compo- | |
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| nent." | |
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66h |
| Set cache registers to their CMOS values if | |
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| CMOS is valid, unless auto configuration is | |
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| enabled, in which case load cache registers | |
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| from the Setup default table. | |
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67h |
| Quick initialization of all Application Proces- | |
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| sors in a | |
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