Commodore 128D User Manual page 314

where:
string Contains shape to be drawn j j
X,Y Top left coordinate (scaled) telling where to
draw the shape (default is the pixel cursor) ___
mode Replacement mode: i '
0: place shape as is (default) ^~^
1: invert shape
2: OR shape with area
3: AND shape with area
4: XOR shape with area
The replacement mode allows you to change the data in the string
variable so you can invert it, perform a logical OR, exlusive OR or
AND operation on the image. The X and Y values can place the pixel
cursor at absolute coordinates such as (100,100) or at coordinates
relative to the previous position (4- / - X and + / - Y) of the pixel cur
sor such as (+ 20, - 10). The coordinate of one axis (X or Y) can be
relative and the other can be absolute. Here are the posible combi-
nations of ways to specify the X and Y coordinates.
absolute x, absolute y
+ / - x,y relative x, absolute y
x, + / - y absolute x, relative y
+ / - x, + / - y relative x, relative y
Also see the LOCATE command for information on the pixel cursor.
(0°)
(360°)
270° PC (90°)
180°
306 BASIC 7.0 ENCYCLOPEDIA—Basic Commands and Statements