>>I've always wondered why Microchip didn't do something similiar.

>'cos it isn't necessary - *if programmed correctly*, ROM corruption
>just doesn't happen, so the extra cost of a verification mechanism
>isn't justified. Unfortunately, some standards have been written which
>require it, and MCT added a facility to the 16C715 for this reason.


Well, I wouldn't (and haven't) use it for ROM checksumming, but I think
it's nice to be able to put big tables in ROM space (especially with the
ADSP-2181, where it makes FIR filters much nicer).  Something like a
sine-table lookup could use the extra precision.

Now if I were building something that was going into low earth orbit, I
might want a rom checksum...


newell