COL is a function which returns the colour of a given screen pixel (specified in absolute co-ordinates). The colour is however not coded in the usual way - the return value of COL is either 0, 1, 2 or 3 (representing the four true colours which can displayed in MODE 4, ie. black, red, green and white).
100 WMON: LIST#2 110 xmin% = 0: xmax% = 100 120 ymin% = 0: ymax% = 100 130 FOR x% = xmin% TO xmax% 140 FOR y% = ymin% TO ymax% 150 c% = 2 * COL(x%,y%) + 1 160 BLOCK 1, 1, x%-xmin%, y%-ymin%, c% 170 END FOR y% 180 END FOR x%
Unless you are using Minerva or SMS, replace x% and y% by x and y.
COL will return meaningless data unless the screen is located at address 131072, is in MODE 4, and uses a 512 x 256 resolution.
SET draws a screen pixel.