Radio Shack TRS-80 Operation Manual page 130

computer Graphics Operation Manual
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CALL PAINTT (A,l,v)
POINT Returns the pixel value at current coordinates.
K=POINT(M)
PRESET (color) Sets the pixel ON or OFF.
CALL
PRESET(~)
PSET (color) Sets the pixel ON or OFF.
CALL PSET(~)
SCREEN (~) Sets the screen.
CALL SCREEN(l)
SETXY(X,Y) Sets the coordinates (absolute).
CALL
SETXY(l~~,l~~)
SETXYR(X,Y) Sets the coordinates (relative).
CALL SETXYR(5~,5~)
VIEW(leftX,leftY,rightX,rightY,color,border)
Sets the viewport.
CALL
VIEW(1~~,1~~,2~~,2~~,~,1)
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