sdavidson@ITS.BLDRDOC.GOV <PICLIST@MITVMA.MIT.EDU> wrote:

> What about using just a 8 bit CRC for 4 words of data.  Is that
> crazy?  Would a checksum be better?

Steve:

Depends on how much error-resistance you need.  Checksums, in
general, are less robust than CRCs... Aside from anything else, they
give much more weight to the low-order bits of your data than the
high-order bits.

For some other ideas, you might want to take a look at the
explanation of Hamming codes on the "Answers" page of my company's
web site... It's in the "Miscellaneous" section of that page.

-Andy

=== Andrew Warren - fastfwd@ix.netcom.com
=== Fast Forward Engineering - Vista, California
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