Re: Python CPU

From	Dennis Lee Bieber <wlfraed@ix.netcom.com>
Subject	Re: Python CPU
Date	2011-04-03 22:59 -0700
Organization	> Bestiaria Support Staff <
References	(1 earlier) <8vps7tF9vuU1@mid.individual.net> <BANLkTin_Zme7atW7eg-kT6CNsoPJ5MzWyg@mail.gmail.com> <mailman.170.1301845860.2990.python-list@python.org> <4d98ab35$0$10594$742ec2ed@news.sonic.net> <pan.2011.04.03.21.36.55.47000@nowhere.com>
Newsgroups	comp.lang.python
Message-ID	<mailman.183.1301896772.2990.python-list@python.org> (permalink)

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On Sun, 03 Apr 2011 22:37:16 +0100, Nobody <nobody@nowhere.com>
declaimed the following in gmane.comp.python.general:

> On Sun, 03 Apr 2011 10:15:34 -0700, John Nagle wrote:
> 
> >      Note that if you run out of return point stack, or parameter
> > stack, you're stuck.  So there's a hardware limit on call depth.
> > National Semiconductor once built a CPU with a separate return
> > point stack with a depth of 20.  Big mistake.
> 
> The 8-bit PIC microcontrollers have a separate return stack. The PIC10 has
> a 2-level stack, the PIC16 has 8 levels, and the PIC18 has 31 levels.
> 
> But these chips range from 16 bytes of RAM and 256 words of flash for a
> PIC10, through 64-256 bytes of RAM and 1-4K words of flash for a PIC16, up
> to 2KiB of RAM and 16K words of flash for a PIC18, so you usually run out
> of something else long before the maximum stack depth becomes an issue.

Not an architecture on which to code a recursive Fibonacci sequence. <G>
-- 
	Wulfraed                 Dennis Lee Bieber         AF6VN
        wlfraed@ix.netcom.com    HTTP://wlfraed.home.netcom.com/

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            Re: Python CPU Terry Reedy <tjreedy@udel.edu> - 2011-04-04 13:14 -0400
            Re: Python CPU Terry Reedy <tjreedy@udel.edu> - 2011-04-04 14:58 -0400
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          Re: Python CPU Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2011-04-03 22:59 -0700

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