Thank you very much,Bob.I've visited your page and I found your propeller
clock really interesting.Though I downloaded your source code and printed
it,I haven't had time to go through it yet.Anyhow,I 'm too much of
rookie in this microprocessor thing to give you a worthy opinion on it.
 One more question I have : How can I simulate a WDT overflow reset with
MPLAB ?.I select options/developement mode/mplab simulator & 16c84 then
options/processor setup/hardware/wdt chip reset enable but when I simulate
a simple program such as the following,the tmr0 register keeps overflowing
and no reset occurs:
;
;
  LIST P=16C84,R=DEC
  INCLUDE "PICREG.EQU"
;
;

RESET   ORG     00H
        GOTO    START
START   CLRWDT
        CLRF    TMR0
        MOVLW   B'00001111'
        OPTION
        CLRWDT                 ; shuldn't tmr0 reg get cleared on each CLRWDT ?
        MOVLW   B'00001001'
        OPTION
        CLRWDT
LOOP    NOP
        GOTO    LOOP; Shouldn'there happen a reset here on wdt overflow?
        END


 Thanks.

At 23:30 30/07/97 -0700, you wrote:
>Hi Walter,
>
>You might not get exactly the example you want, but look at the code for my
>clock and see what you think. It keeps track of time using timer-based
>interrupts, and uses the WDT, too.
>
>http://www.bobblick.com/bob/projects/mclock.html is the cover page for it,
>and the source is
>http://www.bobblick.com/bob/projects/mclock8.asm
>
>Cheerful regards,
>
>Bob
>
>
>At 01:36 PM 7/30/97 -0300, you wrote:
>> Hi,could somebody show me a routine implementing WDT reset with prescaler
>>setting on the 16c84.I'm new in this thing and my electronics' knoweledge
>>is rather limited.However,I need to build a simple controller to handle
>>a series of pneumatic valves in an industrial envoiroment,which means
>>it is subject to be bothered by line noises.Hence,I thought the WDT might
>>be the solution for that.Another question: Is there a way of keeping real
>>time with 16c84 and still use the WDT ?
>>
>> Thanks in advance.