At 04:56 20/10/99 -0400, you wrote:
>I've been programming the PIC16F877 using Pic C.  My question is about the
>interupts.  With the Pic16F877 there is just one interupt vector right?  So
>when ANY interupt happens it goes to the same procedure.  In order for this
>to be usefull do I set up a "If this Interupt Flag is True then this" kind
>of thing or what?

I set up a 'ladder' checking the interrupt flags to decide which isr
routine to go to.  There are probably better ways but mine is just a string
of

btfsc int1_flag
goto int1_routine ... etc etc ...

at the interrupt vector, after the context saving code.

>And as for the USART interupts.  I can understand using
>the Recieve Interupt as that would allow you to buffer bytes and then read
>them when you get the time, but why would you need a send Interupt?

It can tell you when the send buffer is empty so you can go and load some
more data without wasting time polling it to find out

Nigel