Hi everybody,

I have a problem writing to a table.
this is my first try on using a table. I am modifying a program which came 
with PICDEM 2 PLUS.

I first read a Byte and find the expected original data there
then I write different data to this Byte
and then I read again from this same place and finde the original data is 
still there.

or is the table, as it is set up read-only???
thank you in advance
Lembit

the loop is this:

-----------------
wr_next_char_1
 tblrd *
 movff TABLAT, testRD
 movff testWR, TABLAT
 tblwt *
 tblrd *+
 movff TABLAT, testRD
 decfsz ptr_count,F  ;move pointer to next char
 bra  wr_next_char_1
-----------------

before this loop is following program:

-----------------------------
 movlw .160
 movwf ptr_pos
 movlw "X"
 movwf testWR
 movlw .16   ;1-full line
 movwf ptr_count
 movlw UPPER my_table
 movwf TBLPTRU
 movlw HIGH my_table
 movwf TBLPTRH
 movlw LOW my_table
 movwf TBLPTRL
 movf ptr_pos,W
 addwf TBLPTRL,F
 clrf WREG
 addwfc TBLPTRH,F
 addwfc TBLPTRU,F
-----------------------------

before that I have the table set up like this:

------------------------
my_table    ;table for my code
 data " Lembits        " ;0
 data " Microprocessor " ;16
 data "Fenster Nord Azi" ;32
 data "West-Fenster Azi" ;48
 data " Achtung: offen " ;64
 data "- geschlossen - "  ;80
 data "Taste 1         " ;96
 data "Taste 2         " ;112
 data "Taste 3         " ;128
 data "Taste 4         " ;144
 data "richtig123456789" ;160
 data "falsch          " ;176
 data "Bus-Result      " ;192
 data "  elec-tronic   " ;208
 data "Fenster Nord Azi" ;224
 data "West-Fenster Azi" ;240
 GLOBAL my_table

------------------------ 

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