Having problems with anything larger than 32h - PIC16F84

I'm working on a school project and I'm just trying to enhance the code now for my own enjoyment and the problem that I'm having is that whenever a variable becomes larger then 32 (hexadecimal), the PIC project seems to just freeze. What is being done is a 'picture' is stored in 1s and 0s (1 will mean an of LED, 0 means on) with one group of 8 (a byte) being one line of the picture (the output is on an 8x8 LED matrix). Since what I'm drawing is longer than 8 lines (69h actually), there is a scrolling function written. The original program had a 16 line image scroll by. This looping function works great until I try to go past 32h. Then it seems to just freeze. Here is the code I have now:

Code:

---

        TITLE "98-0380-AUS-P (picxie2) V1.00 - (C) 1998 Lewin Edwards ([email protected])"

        INCLUDE "P16F84.INC"

        LIST P=16F84
        __CONFIG B'11111111110001'        ;All protection off, powerup timer on, WDT off, XT osc

;--------------------------------------------------------------------------
;        Behavioral constants
DEFAULT_MULTIPLEX_RATE        EQU H'50'        ;Multiplex speed. Probably don't need to modify this.
DEFAULT_FRAME_RATE                EQU H'20'        ;Default number of times to display frame
SCREEN_HEIGHT                        EQU H'08'        ;Number of lines on screen
SCREEN_WIDTH                        EQU H'08'        ;Number of columns on screen
NUMBER_OF_LINES                        EQU H'30'        ;Number of lines of text to display
REPEATS_DONE                        EQU H'02'        ;Number of times to do the number of lines given

..
..
..
..
..

;---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
;        SUBROUTINE        Rotate screen buffer UP one line (top line of
;                        offscreen buffer becomes bottom line of onscreen)
;                        Scratch0 - line counter
;                        Scratch1 - swap holding register
;---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
RotateUp        MOVLW        NUMBER_OF_LINES*REPEATS_DONE
                MOVWF        Scratch0
               
                ; Setup destination pointer
                MOVLW        Screen0+1
                MOVWF        FSR
               
                ; Save the top line of the display
                MOVF        Screen0,0
                MOVWF        Scratch1               
               
RULoop                MOVF        INDF,0                        ;get line
                DECF        FSR,1                        ;locate destination
                MOVWF        INDF                        ;put line data in new location
                INCF        FSR,1                        ;locate next line source
                INCF        FSR,1
                DECFSZ        Scratch0,1
                GOTO        RULoop

                MOVLW        NUMBER_OF_LINES
                MOVWF        Scratch0
                DECFSZ        REPEATS_DONE,1
                GOTO        RULoop

                MOVLW        NUMBER_OF_LINES
               
                MOVLW        H'02'
                MOVWF        REPEATS_DONE
                ; Restore the top line of the display (now the bottom line)
                MOVF        Scratch1,0
                MOVWF        Screen0+NUMBER_OF_LINES*REPEATS_DONE

---

You'll notice that I have tried to get around this by only making the NUMBER_OF_LINES 32h, and then repeating that 32h REPEATS_DONE times. This does not freeze, it simply starts showing fully ON lines.


Can anyone show me how to make a variable (maybe the INDF pointer is the problem) go above 32h?

Thanks!:D