Let me take number 1.

Quote Originally Posted by cometboy
...

1) ...I get a compiler error - undefined symbol PortA for a 12F629, but not for a 16F819.

Is this a correct diagnosis?...

Alan

Alan,

Check the datasheet of 12F629.
You will see that the PORTA does not exist.
You will see GPIO.

PORTA is valid for 16F819. TRISA is also.
You get these as GPIO and TRISIO for 12F629.



------------------------------