Re: Python CPU

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From	Dennis Lee Bieber <wlfraed@ix.netcom.com>
Subject	Re: Python CPU
Date	Sun, 03 Apr 2011 22:59:19 -0700
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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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Python CPU Brad <hwfwguy@gmail.com> - 2011-04-01 08:38 -0700
  Re: Python CPU jkn <jkn_gg@nicorp.f9.co.uk> - 2011-04-01 08:59 -0700
  Re: Python CPU Nobody <nobody@nowhere.com> - 2011-04-01 17:52 +0100
    Re: Python CPU Stefan Behnel <stefan_ml@behnel.de> - 2011-04-01 19:00 +0200
    Re: Python CPU geremy condra <debatem1@gmail.com> - 2011-04-01 10:12 -0700
  Re: Python CPU Emile van Sebille <emile@fenx.com> - 2011-04-01 11:28 -0700
  Re: Python CPU Emile van Sebille <emile@fenx.com> - 2011-04-01 11:35 -0700
    Re: Python CPU John Nagle <nagle@animats.com> - 2011-04-01 12:18 -0700
  Re: Python CPU "BartC" <bc@freeuk.com> - 2011-04-02 23:06 +0100
    Re: Python CPU Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-04-03 04:03 +0000
  Re: Python CPU Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2011-04-03 12:10 +1200
    Re: Python CPU Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-04-03 04:01 +0000
      Re: Python CPU John Nagle <nagle@animats.com> - 2011-04-03 00:16 -0700
        Re: Python CPU Paul Rubin <no.email@nospam.invalid> - 2011-04-03 01:59 -0700
          Re: Python CPU Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2011-04-04 19:41 +1200
        Re: Python CPU Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2011-04-04 19:47 +1200
          Re: Python CPU Paul Rubin <no.email@nospam.invalid> - 2011-04-04 02:23 -0700
            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
              Re: Python CPU Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2011-04-05 09:59 +1200
          Re: Python CPU geremy condra <debatem1@gmail.com> - 2011-04-04 09:36 -0700
            Re: Python CPU Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2011-04-05 10:05 +1200
          Re: Python CPU John Nagle <nagle@animats.com> - 2011-04-04 12:56 -0700
            Re: Python CPU Paul Rubin <no.email@nospam.invalid> - 2011-04-04 13:20 -0700
              Re: Python CPU Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2011-04-05 10:11 +1200
    Re: Python CPU Werner Thie <werner@thieprojects.ch> - 2011-04-03 17:44 +0200
      Re: Python CPU John Nagle <nagle@animats.com> - 2011-04-03 10:15 -0700
        Re: Python CPU Nobody <nobody@nowhere.com> - 2011-04-03 22:37 +0100
          Re: Python CPU Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2011-04-03 22:59 -0700

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