; @label:$B755=$B755
C $B755 store value of BC in COORDS sys var (x-coord of last point plotted)
C $B759 call PIXEL-ADD in ROM (sets A and HL)
C $B75C set loop counter by loading position of pixel within byte into B and adding one
C $B75E load address of address file byte holding the pixel into A
C $B75F rotate A left 'B' times
C $B762 return if bit 7 has NOT fed back a '1' into bit 0 of A
C $B765 otherwise store $01 in LOF_D and return