Andy,

Can you detail why this would be a problem with larger PICs (multiple code banks
)?

Thanks,
Mitch

------------------------------------
Mitch Miller, Roseville, CA
mitchm@ns.net
------------------------------------

-----Original Message-----
From:   Andy Kunz [SMTP:mtdesign@FAST.NET]
Sent:   Monday, December 28, 1998 7:38 AM
To:     PICLIST@MITVMA.MIT.EDU
Subject:        Re: isr without context save ?

At 03:13 PM 12/28/98 +0100, you wrote:
>Hi,
>
>Just a view seconds after my previous posting I catched that I may be
>wrong.
>How about this version ?
>
>       org     4
>       Int                       ;  Interrupt Handler
>
>       bcf    INTCON,T0IF        ;  Reset the Interrupt Source
>
>       incfsz Counter_Low, F     ;  inc low
>       goto $+2                  ;  normaly skip incrementing HIGH-byte
>       incfsz Counter_High, F    ;  inc high on roll-over
>       nop                       ;  high is rolled over
>
>       retfie

This may have a problem with a large chip with multiple code banks.  But
for a small chip like the '84, you'll be just fine.  I have used precisely
this method in a '558, so I know it works.

>I4m still getting sometimes confused with the "skip if ...." and goof
>myself :-(

Yes, it is slightly confusing

==================================================================
  Andy Kunz - Montana Design - http://www.users.fast.net/~montana
==================================================================