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Atari CX70 Operator's Manual page 13

Light pen

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ATARI Light Pen Operator's Manual
DRAWING AREA
-L
MENU
LINES PLOTTED AND
ERASED WHILE PEN
WAS PRESSED TO
SCREEN AND MOVED
AROUND
INITIAL POINT 0 TOUCHED
THIS LINE WAS
FROZEN IN PLACE
WHEN THE PEN WAS
FINALLYJ.IFTED AT
POINT 0-
1. RED BOX AS SHOWN
2. RED DOT
3. GREEN DOT
4. BLUE DOT
5. REDO
SEPARATOR BAR
FUNCTIONS: (If pen is pressed to this character)
1. Set Pen color to background ("erase" color if plotted)
2. Set Pen color to red for plotting
3. Set Pen color to green for plotting
4. Set Pen color to blue for plotting
5.
Clear entire screen#
redraw the menu
Figure 2
Television Screen Display for 8K PALLET Program
Press the pen against one of the other color blocks in the menu area.
Now draw one or more lines. The pen color is now the new color you
selected. Try the third color also.
When you wish to erase the screen and start over# press the pen
against the bottom box in the menu area. As it is lifted# the screen
will clear and the menu will be redrawn.
The program listing for the 8K version of PALLET is shown in Figure 3.
(Refer to Appendix G for additional notes on this program listing.) At
this point the listing will seem somewhat cryptic# especially lines
ATARI Light Pen Demonstration Program Cassette - 9

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