On Jan 1, 2006, at 3:26 PM, Herbert Graf wrote:

>> Try enabling "Integer Promotions" in the C18
>> preferences and see if that helps.
>
> BINGO!

Good.  If this is an ip checksum routing, you were missing
the code that does the end-around carry folding in between
the loop at the complement...

Also, while this is a sort of standard unix ip checksum
algorithm, it's a REALLY BAD algorithm to use on a CPU
that doesn't natively support 32bit integers.  It dates
back to vaxen and 68000s, and is not good for PICs...
(alas, C is not so good for implementing the IP checksum
algorithm, because it doesn't give you access to the 'extra'
carry bit..)

BillW

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