Problem with ASM IRQ using FSR0 on PIC18F252

[jmen]

I´m realy a fool! I changed the wrong variable declaration to aliases as you suggested - now it´s working!!
thanks a lot, you´ve saved my life!!
Another short question...
When i have declared a variable as word - how do I assign a value like 1000 to it or better a value from anoter variable or constant?

In PBP I would do:
<pre>resetValue CON 1000
counter = resetValue</pre>
or:
<pre>resetValue VAR WORD
resetValue = 1000
counter = resetValue</pre>
In ASM: ??
<pre>MOVFF _resetValue, _counter</pre>
You see I´m a real beginner in ASM :-(

regards,
Jan

[Darrel Taylor]

Hey, don't worry about it Jan. I think I made the same mistake in the beginning.

To move 1 word var to another using movff might look like this ...

MOVFF _resetValue, _counter
MOVFF _resetValue+1, _counter+1

but that will only work with 2 variables. movff won't work with constants.

The easiest way to copy things from 1 place to another is using the MOVE?xx macro's. Take a look at this post for more info.

https://www.picbasic.co.uk/forum/showthread.php?p=2009

The MOVE?xx macro's will take care of all the bank switching (if required) the same way that PBP does it. <br><br>