on the screen.

To use this routine in another program, use lines 90 and 230-440 section. Set up X1, Y1, X2 and Y2 with the coordinates of the two endpoints in the desired line, and GOSUB 230. The subroutine will clip the line and redraw the portion that is on the screen (if any).
I will be happy to assist anyone having questions about specific applications of this routine. Write to Tom Hudson, 2369 E. Seminole, Springfield, MO 65804. My Micronet number is 70775,424.