Function 15, subfunction 2 - put pixel on the background image.
Parameters:
- eax = 15 - function number
- ebx = 2 - subfunction number
- ecx = offset
- edx = color of a pixel 0xRRGGBB
Returned value:
- function does not return value
Remarks:
- Offset for a pixel with coordinates (x,y) is calculated as
(x+y*xsize)*3.
- If the given offset exceeds 0x160000-16 = 1.375 Mb - 16 bytes,
the call is ignored.
- For update of the screen (after completion of a series of commands
working with a background) call subfunction 3.
- There is a pair function for get pixel on the background image -
subfunction 2 of function 39.