Tri-pixel plotter



Kenneth Baker,

Bitterne,

Southampton.



This short routine will allow you to plot several pixels at

the same time, giving the effect of a thick line.

  The technique used is to plot normally, save the posi-

tion, then plot the positions on either side of the

original in both the x and y dimensions, before restoring

the original position for the next move.

  It is especially useful for distinguishing between two

plotted routines, as the exanmple sine wave program will

illustrate - where one curve is plotted normally, and the

other using this routine.

  There are only 53 bytes in the routine, which can be

entered at any convenient place in memory; and lines 13 and

14 of the Loader program and line 70 of the sample program

can be changed accordingly.