Changes
/* Fast plotting routine for MODE 1 */
== Fast plotting routine for MODE 1 ==
This routine is approx. 6 times faster than the OS routine GRA PLOT, because it is dpendent dependent to MODE 1 and doesn't perform range checks. It can draw 10500 pixels per second.
'''Input:''' DE = ''X (0..319)'', HL = ''Y (0..199)''
ADD HL, HL ;of the raster line
LD A, E ;Lowbyte X to A
SRL D ;calculate X\8, because
RR E ;8 pixel per byte
