Setting Environment to Bug/Operating System
Table A-1. ENV Command Parameters (Continued)
| ENV Parameter and Options | Default |
| Meaning of Default | |
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| Network Auto Boot ConÞguration | 00000000 | This is the address where the network | ||
| Parameters Pointer (NVRAM) |
| interface conÞguration parameters | ||
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| are to be saved in NVRAM; these | ||
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| parameters are the necessary | ||
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| parameters to perform an unattended | ||
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| network boot. | ||
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| ! |
| If you use the NIOT |
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| debugger command, these | |
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| Caution | parameters need to be | |
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| saved in the NVRAM, | ||
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| somewhere in the address |
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| range $FFFC0000 through |
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| $FFFC0FFF. The NIOT |
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| parameters do not exceed |
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| 128 bytes in size. The |
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| location for these |
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| parameters is determined |
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| by setting this ENV |
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| pointer. If you have used |
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| the exact same space for |
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| your own program |
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| information or |
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| commands, they will be |
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| overwritten and lost. |
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| Memory Search Starting Address | 00000000 | Where the Bug begins to search for a | ||
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| work page (a 64KB block of memory) | ||
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| to use for vector table, stack, and | ||
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| variables. This must be a multiple of | ||
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| the debugger work page, modulo | ||
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| $10000 (64KB). In a | ||
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| environment, each MVME187 board | ||
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| could be set to start its work page at a | ||
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| unique address to allow multiple | ||
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| debuggers to operate simultaneously | ||
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| from the same memory. | ||
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A |
