Drawing individual pixels with the eutodraw system.

William Overington

Copyright 2001 William Overington

It has previously been possible to draw a single pixel by drawing a line from a point to that same point. This has, however, been inconvenient as the same position data has needed to be entered twice, into two adjacent columns of the eutodraw table.

A new action code, action code 40, has been added that draws one pixel at the chosen point in the chosen colour. Action code 40 uses only one column of the eutodraw table.

Here is an example, for drawing the pixel at x=100, y=200 notionally in blue, blue being colour 6. However, please remember that the colour produced with depend whether the eutodraw system is in paint mode or xor mode at the time. If in paint mode, then the pixel will be drawn in blue. In xor mode, it may be drawn in blue or something else depending upon the settings used and the existing colour of the pixel.

x

100

y

200

c

4006

1456 object code

Copyright 2001 William Overington