Commodore 128D - Page 107

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capable of this because it uses two separate parts of the computer's
memory to store the two screens: one part of the text, and the other
for the graphics screen.
Type the following short program:
10 COLOR 0,1: REM TEXT BACKGROUND COLOR = BLACK
20 COLOR 1,3: REM FOREGROUND COLOR FOR BIT MAP
SCREEN = RED
30 COLOR 4,1: REM BORDER COLOR = BLACK
This example colors the background black, the foreground red and
the border black.
Selecting the Graphic Mode
The next graphics programming step is to select the appropriate
graphic mode. This is done using the GRAPHIC command, whose
format is as follows:
GRAPHIC Mode [,c][,s] or GRAPHIC CLR
where mode is a digit between 0 and 5, c is either a 0 or 1 and s is a
value between 0 and 25. Figure 6-4 shows the values corresponding
to the graphic modes.
Mode Description
0 40-column standard text
1 Standard bit map
2 Standard bit map (split screen)
3 Multicolor bit map
4 Multicolor bit map (split screen)
5 80-column text
Figure 6-4. Graphic Modes
The parameter CLR stands for CLEAR. Figure 6-5 explains the values
associated with CLEAR.
C Value Description
0 Do not clear the screen
1 Clear the screen
Figure 6-5. CLEAR Parameters
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USING C128 MODE—Color, Animation and Sprite Graphics Statements