My First Nios-II

Roland,

The error message is complaining about the instruction fetch.

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ERROR: [439] instruction fetch access to address 0x1af8 returned uninitialized memory[/b]

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It sounds like the simulator&#39;s memory at 0x1af8 hasn&#39;t been initialized. The simulator realizes this when it fetches an instruction from that address.

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I wonder if it has to do with the remark &#39;valid mask=0x0&#39; in the error message.[/b]

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I think that the value mask records which bytes of the memory have been initialized. 0x0 means an entirely uninitialized word.

Kerry