It is quite often the small things that can make an ordinary program
a little bit more special. If you take care in the presentation of your
program including such things as titles and instructions, you will end
up with a program which will impress people from the start.
Here are a couple of simple routines to add life to the beginning of
your programs. Listing 1 for Graphics 0 simply POKEs the Character Base
Register at location 755 with a 1 which makes all inverse characters
disappear. Try changing the loop in line 60 to any combination between 0
and 4 for different results. Alter the value of the step to change the
speed of the flashing.
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Listing 2 works in Graphics 1 or 2 and simply cycles the inverse
characters through the colours available. Location 710 controls the
colour value of inverse upper case letters in these modes.
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Listing 3 runs through a string and makes each character 'inverse'
which in Graphics 1 & 2 simply changes the color of the characters.
Try adding some sound to this routine.
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