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Technotools (Chestnut CD-ROM)(1993).ISO
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manset
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1987-04-01
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These programs require an IBMPC or clone with a CGA card. A monchrome monitor
will give shades of green (quite acceptable). You don't need much memory and
everything will work with one floppy drive.
If you don't know what the Mandelbrot set is, I recommend an article in
Scientific American, August 1985, by A.K. Drewdney.
You should find the following files in this ARC'ed file.
MANSET.COM
MANSET87.COM
MANSET.PAS
QUIKPLOT.COM
QUIKPLOT.PAS
and some *.PIC files.
To generate pictures from scratch you should either compile and run MANSET.PAS
(which requires TURBO PASCAL) or just run MANSET or MANSET87 from DOS. To get
an idea of what to expect, try QUIKPLOT first and look at some of the *.PIC
files I have included.
As you might expect, MANSET87 requires the presence of an 8087 co-processsor
chip, but it is MUCH faster. Be prepared for overnight runs if you have a
standard PC or clone with just an 8088.
When the program starts, it will ask for a picture name (any 8 character DOS
filename will do, but I recommend you keep it shorter as you will find out
there isn't room for 8 characters on the screen. The examples use P01 etc.
You will then be asked for :
Real corner (Top left on screen)
Imaginary corner (Also top left)
Side
Try Real = -1.25, Imaginary = -1.25, Side = 2.5 at first. This will display
the entire Mandelbrot set and its surroundings. After that you can zoom in
and find out what all the fuss is about. Remember that there is nothing of
interest in the set itself (the central black area) but in the areas close
by.
The picture you generate will be stored in a *.PIC file, which can be
redisplayed by using QUIKPLOT. This allows you to build up a library of images.