The stack is circular.

andy
----- Original Message -----
From: "Peter L. Peres" <plp@ACTCOM.CO.IL>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: Sunday, December 23, 2001 1:33 AM
Subject: Re: [PIC]: Implementing MCLR in software


> > Who cares what's on the stack after a 'reset'?
> > D
>
> Since the SP does not get reset (Bob says it does not matter since it is
> circular), you do, since you may run out of free stack sooner than you
> plan. F.ex. if the stack is not circular and the soft reset occurs in a
> subr. nested at stack level 2 and the soft reset does not clear the stack
> (it can't, on a 12 or 14 bit core pic) then you only have 4 levels of
> stack left. This is almost certainly not enough. Of course the point is
> moot if the stack is circular but my ompression of the datasheet programs
> was, that it is not.
>
> Peter
>
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