Commodore 128D - Page 255

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CIRCLE
Text (alphanumeric strings) can be displayed on the screen at a given
location by the CHAR statement. Character data is read from the
Commodore 128 character ROM. The user supplies the x and y coor
dinates of the starting position and the text string to be displayed.
Color source and reverse imaging are optional.
In 40-column format the string is continued on the next line if it
attempts to print past the (40th column) right edge of the screen.
When used in TEXT mode, the string printed by the CHAR command
works just like a PRINT command, including cursor and color control.
These control functions inside the string do not work when the CHAR
command is used to display text in bit map mode. Upper/lower case
controls (CHR$ (14) or CHR$ (142)) also operate in bit map mode.
Multicolor characters are handled differently than standard charac
ters. First select multicolori and multicolor 2 with the COLOR com
mand. Set the GRAPHIC mode to multicolor. To display the fore
ground on multicolor 1, set the color source in the CHAR command
to zero and the reverse flag to zero. To display the foreground on
multicolor 2, set the color source to 0 and the reverse flag to 1. The
following example displays the foreground character color using a
red background. Change the reverse flag to 1 and the characters are
displayed in multicolor 2 (blue).
10 COLOR 2,3: REM MULTICOLOR 1 = RED
20 COLOR 3,7: REM MULTICOLOR 2= BLUE
30 GRAPHIC 3,1
40 CHAR 0,10,10,"TEXT",0
—Draw circles, ellipses, arcs, etc. at specified positions on the
screen
CIRCLE [color source],[X,Y],Xrad[,[yrad][,[sa]
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where:
color source 0 = background color
1 = foreground color
2 = multicolor 1
3 = multicolor 2
x,y Center coordinate of the CIRCLE
(default is the PC location)
247
BASIC 7.0 ENCYCLOPEDIA—Basic Commands and Statements