Many thanks to all members who have sent
in reviews and articles. I have managed
to squeeze in a lot this month. If you
have an article that you would like
circulated then please write it marking
your envelopes "Articles/Reviews". An
article is classed as a submission
which is greater than 300 words.
MANDLEBROT SET ARTICLE=
This article is to be used with the
Mandlebrot set program on this month's
Upon loading the program the Mandlebrot
screen is loaded and the user is offered
three options- (Z)oom, (S)ave and
Press Z. You now have a flashing square
in the centre of the screen which you
can move using the cursor keys. The
delete key reduces the size of the
square and increases the magnification.
The copy key does the reverse of this.
Once you have selected your position
and magnification press Space. The
co-ordinates of the Mandlebrot part you
have chosen will be shown. Press Space
You are now asked for a colour set(1/2).
Colour set 1 is worked out using logs.
The main Mandlebrot is plotted using
these colours. Colour set 2 is worked
out by dividing the number of *
iterations by 8 and is best for close
up work. Just use colour 1 until you
get the hang of it. Enter the colour
set and press Return.
At the top left of the screen is the
number of recursions done per pixel.
If you think the part of the Mandlebrot
set you magnified is 'interesting' then
make note of the x, y and m values down
on the left hand side. Hint: Don't try
to Zoom in large steps ie. don't make
the square too small. It is best to zoom
in small steps.
This saves the screen currently showing
using addresses &3000 th &8000. *
Just select the option and follow
Many thanks to Ian Roxborough(9IA) for
sending in this article. if you create
any 'interesting' screens as mentioned
by Ian, then send them in and we'll get
them on an issue disc for you.
IF YOU ARE THINKING OF WRITING A PROGRAM
IN THE NEAR FUTURE----------------------
then hang on until next month when Ian's
article on programming and presentation
will be published. Ian is also working
on a program called LISSA. The initial
program he sent to me is outstanding-
watch this space for further