Date   : Fri, 10 Mar 2006 15:25:50 +0000 (GMT)
From   : Greg Cook <debounce@...>
Subject: Mandelbrot plot times & host speedups

On Thu, 09 Mar 2006 19:03:12 +0000 (GMT), Sprow <info@...>
wrote:

> If I take out the line with the PLOT/MOVEs on it goes down to 43
> secs, so
> the other 3 mins 50 secs must be spent waiting for the beeb to plot
> it - in
> which case I would tend to agree in this example it's probably only
> going to
> dint the time.
> 
> Ideally it would take (4m33s - 43s) such that it just boiled down to
> the
> slower of the two machines' time,
> Sprow.

There were a couple of speedup tips in The Micro User, which will by
some accounts drastically improve the host's processing rate:
- September 1984, p.180. (Contributed by I.A.Padgett)
  Longer intervals between keyboard scans.  The Tube-compatible version
  is:
  *FX 151,69,255
  *FX 151,70,255
  (The normal values are *FX 151,69,14 and *FX 151,70,12.) 

- February 1988, p.89. Don't sample any ADC channels:
  *FX 16,0

About to try Dave's line-producing listing on the model B with these. 
Anyone played Extra Rheolism on the copro yet?

Greg Cook
debounce@...
http://homepages.tesco.net/~rainstorm/



               
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