Yo no sé usar esas instrucciones que mencionas recién me estoy familiarizando con los PICs 18 y ahora estoy por usar la instrucción TBLRD. Me encontré un código en la pagina de Microchip te lo pego aquí a ver si te sirve de algo.
Seguro buscando un poquito en la pagina, encuentras para las otras instrucciones.
Saludos...
;************************************************************
; PIC18CXX2 EXAMPLE CODE FOR PICDEM-2
;
; TITLE: Table Read Demonstration
; FILENAME: table.asm
; REVISION HISTORY: A 5/13/00 jb format change
; HARDWARE: PICDEM-2 board
; FREQUENCY: 4MHz
;
;************************************************************
; This program demonstrates the use of the TBLRD instruction
; to read program memory.
;
; A pre-defined sequence of data
; bytes is included in program memory. Each time the button
; on pin RA4 is pressed, the next byte of data is accessed
; and displayed on the PORTB LEDS. When the beginning or end of
; the data is reached, the direction of access is reversed.
list p=18c452, n=48, t=ON, st=OFF
#include "p18c452.inc"
;-------------------18C452 RAM LOCATIONS------------------------------
DIRFLAG EQU 0x0000
;-------------------18C452 ROM LOCATIONS------------------------------
TABLADDR EQU 0x0003000
;------------------BIT DEFINITIONS------------------------------------
KEY EQU 4
;------------------VECTORS--------------------------------------------
ORG 0x000000 ; rest vector
GOTO START
ORG 0x000008 ; high priority interrupt vector
GOTO START
ORG 0x000018 ; low priority interrupt vector
GOTO START
;--------------------PROGRAM-----------------------------------
START
bsf DDRA,4 ; porta button input
clrf PORTB ; setup portb for outputs
clrf DDRB
clrf DIRFLAG
; Code should be written here to intialize the table pointer registers
; to the first location of the data stored in program memory. Use
; the appropriate assembler directives to accomplish this.
; (Refer to the "DATA" statements in this source code.)
movlw UPPER(TABLADDR)
movwf TBLPTRU
movlw HIGH(TABLADDR)
movwf TBLPTRH
movlw LOW(TABLADDR)
movwf TBLPTRL
MLOOP
btfsc PORTA,KEY ; keypress routine
bra $ - 2 ; decrenment PC by 2 because
btfss PORTA,KEY ; of byte addressing!
bra $ - 2
rcall CHECK_ADDR
btfsc DIRFLAG,0
bra RD_DOWN
RD_UP
; Code here does a table read, post-increments, and writes the
; value to the PORTB LEDS
tblrd*+
movff TABLAT,PORTB
bra MLOOP
RD_DOWN
; Code here does a table read, post-decrements, and writes the
; value to the PORTB LEDS
tblrd*-
movff TABLAT,PORTB
bra MLOOP
;-----------------------------SUBROUTINES--------------------------
CHECK_ADDR
movlw LOW(TABEND) - 1
subwf TBLPTRL,W
bnz CHECK_LOW
setf DIRFLAG
return
CHECK_LOW
movlw LOW(TABLADDR)
subwf TBLPTRL,W
bnz DONE_CHECK
clrf DIRFLAG
DONE_CHECK
return
;-------------------------------DATA---------------------------------------
org TABLADDR
DATA 0x0201,0x0804,0x2010,0x8040 ; 0x003000 - 0x003007
DATA 0x4281,0x1824,0x2400,0x8142 ; 0x003008 - 0x00300F
DATA 0x1211,0x1814,0x2818,0x8848 ; 0x003010 - 0x003017
DATA 0xaa55,0xaa55,0x0100,0x0703 ; 0x003018 - 0x00301F
DATA 0x1F0F,0x7F3F,0xFFFF,0xFFFF ; 0x003020 - 0x003027
TABEND
END
