> Correct, James.  With my simple Hamming code, it's impossible 
> to differentiate between a correctable one-bit error and a 
> non- correctable two-bit error (or, for that matter, between 
> zero errors and three errors).  

Still and all, when bit 7 is set, you know there was an error and the data
may, or may not be corrected. A single bit error will always be detected
(and corrected) and the percentage chance that a multibit error could get
through undetected is next to nothing.

A very nice thing to have.

---
James.
 


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