Hi again!

> 'A' version of the chip differ from its non-'A' counterparts?

I found it. There is a doc for migrating to 16F87X to 16F87XA:

http://www.microchip.com/download/lit/migrat/39591a.pdf

It has a table with the differences (I quoted):

- Two analog comparators with input multiplexing have been added. It4s
inputs are mapped with the existing ADC channels on PORTA. Programmable
reference voltage for comparators is provided
- ICSP programming specifications are different
- Write to FLASH program memory in 4-words blocks, instead of 1-word
blocks

Didn4t I say "don4t trust me 100%" on the last :-)

Cheers,
Diego.

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