Multiborder

Multiborder





Campbell Black and


Alasdair Hobbs,


Junpier Green,


Midlothian





Enhance your Spectrum screen displays with a multicoloured


border. This machine-code routine can be called instead of


using a Pause 0. It can be customised by your program to


give between two and six coloured borders.


A few pokes are required before calling the routine. Poke


65089 with the number of colours required in the border.


Poke 65081 with the number corresponding to the first


colour, poke 65082 with the number corresponding to the


second colour, and so on. Finally, call the routine with


RANDOMIZE USR 65000


The border will remain multicoloured until a key is


pressed. The addresses are summarised in table 1.


Examine the demonstration listing to see how all the


above was achieved from within a Basic program.





Table 1.


Start address 65000


No. of Colours 65080 Poke with a number between 2 and 6


1st colour 65081 Starting here, poke the required


2nd colour 65082 number of addresses with a number


3rd colour 65083 in the range 0-7


4th colour 65084 0=black 1=blue 2=red 3=magenta


5th colour 65085 4=green 5=cyan 6=yellow 7=white


6th colour 65086