Hola .
aqui te mando un ejemplo que no es exacto lo que quieres pero adaptando ,pues esta configurado para glcd puede darte pautas como hacerlo.....
You may be aware that you can scroll text off the screen to the right and down. But with some number manipulation you can scroll on from the left and up off the top of screen.
Try this with your favorite font
INCLUDE "PROTON_G4.INT" " Demo using PROTON Dev board
device 16f877
GLCD_EXTERNAL_PRINT = PPRINT " Point to PPRINT.INC file
CLS
dim chrs
dim ypos
dim xpos
dim offset
offset = 0
ypos = 0
xpos = 226
print font NORMAL_NP
loop:
xpos = 226
repeat
print at 20,xpos," hello"
delayms 20
inc xpos
until xpos = 10
ypos = 128 + 20
repeat
print at ypos,10," hello"
delayms 20
dec ypos
until ypos = (128 -

goto loop
STOP
" Load the fonts used
include "NORMAL_NP.fnt"
saludos
khasitos