Atari XL User Manual

112 The Aten XL Handbook
contents of register 1. A full table of all these codes
is
given in Appendix 7.
The following program demonstrates how multi-
coloured messages can be displayed on the mode 1
and 2 screens using the COLOR and PLOT
commands.
5 REM MODE 1 & 2 COLOR/PLOT DEMO
10 MODE=2
20 GRAPHICS MODE
30 FOR CHAR=O TO 18
40 READ COLR
50 COLOR COLR:PLOT CHAR,8/MODE
60
NEXT CHAR
70 GOTO 70
500 DATA 52,32,100,201,230,70,101
510 DATA 210,229,78,116,32,195,239
520 DATA 76,111,213,242,83
The DATA statements in lines 100 to 120 contain
codes for the characters and their associated colour
registers taken from the table in Appendix 7, and
these are selected one at a time and plotted by the
loop between line 30 and 60. The program will
work equally well in mode 1.
The colours in which the characters are displayed
are the default values for each of the colour
registers, as shown in the table opposite.
The program can be made more interesting by
changing these registers to give different colours
and luminances. If you do change the value .in a
register with the SETCOLOR command, all
characters whose colour is determined by that
register will instantly take on the new colour. You
can see this by deleting line 70 and adding the
following lines to the last program:
100 FOR COLR=O TO 15

Atari XL Specifications

General

Brand	Atari
Model	XL
Category	Desktop
Language	English