[PIC] GLCD(128*64) Output Error

[KhaledOsmani]

Hello,

I`m using the PIC18 Simulator IDE as a compiler.
I've wrote the following code:

Define GLCD_DREG = PORTB
Define GLCD_RSREG = PORTD
Define GLCD_RSBIT = 2
Define GLCD_EREG = PORTD
Define GLCD_EBIT = 3
Define GLCD_RWREG = PORTD
Define GLCD_RWBIT = 4
Define GLCD_CS1REG = PORTD
Define GLCD_CS1BIT = 0
Define GLCD_CS2REG = PORTD
Define GLCD_CS2BIT = 1

WaitMs 20
GLcdinit

Dim i As Word
Dim j As Word


main:
	GLcdposition 1, 0

For i = 15 To 112

	GLcdpset i, 15

Next i

		GLcdposition 3, 0

For i = 15 To 112

	GLcdpset i, 30

Next i

	'GLcdposition 0, 0
		For j = 5 To 45
		GLcdpset 40, j
	Next j
	
		For j = 5 To 45
		GLcdpset 85, j
	Next j

The output is attached as a JPEG photo format.
Problem: discontinuities in the vertical lines.
Why there are such discontinuities, any code error? how to obtain continuing vertical lines (axis)?