At 09:04 AM 5/2/00 -0700, you wrote:
>Is there any body can share me a program snips for eprom write and eprom
>read of PIC 16F84? Let we say, making a PIC as a temporary storage of data.

Hi!.
        It's very easy to read and write to the internal EEPROM in F/C84
here are some code examples:

;read eprom address, data will return in W, memory address must be
; set in EEADR, before call this sub.
;
READEE          CLRF    EEDATA
                BSF     STATUS,5   ;Goto BANK1
                BSF     EECON1,RD
                BCF     STATUS,5   ;back BANK0
                NOP           ; only necessary if running at 10mhz.
                MOVF    EEDATA,W
                RETURN
;
;Writing byte to internal EE :
;address byte must be in EEADR, and value in EEDATA
;
WRITEE          BSF     STATUS,5
                BSF     EECON1,WREN
                MOVLW   0x55
                MOVWF   EECON2
                MOVLW   0xAA
                MOVWF   EECON2
                BSF     EECON1, WR
                BCF     STATUS,5
                MOVLW   1
                CALL    DELAY    ;1 ms sub delay, to allow eeprom to write.
                RETURN

I use this routines and works very good, If you ask me why to write 55h & AAh
to EECON2 I have no idea, but this is the way that works ;-).

Oh, I forgot! label definitions!:
EEDATA          equ     08
EEADR           equ     09
EECON1          equ     88
EECON2          equ     89
WREN            equ     2
RD              equ     0
WR              equ     1

I Hope it will be useful for you.
see you.
   Leandro J. Laporta (LU2AOQ)     mail: lu2aoq@yahoo.com
 wrk: Arg. Assoc. for Space Tech.   ham: TCP/IP high speed group HSG


__________________________________________________
Do You Yahoo!?
Talk to your friends online with Yahoo! Messenger.
http://im.yahoo.com