Try this way:

;***********************************************************************
;TEMPERATURE_TABLE converts values from LM335 sensors
to values
;                  between -23 to 1000C. Negative values are
;                  determined by NEG flag.
;***********************************************************************
TEMPERATURE_TABLE
        movwf   W_TEMP          ;save w
        movlw   high TABLE      ;get HI byte of TABLE address
        movwf   PCLATH          ;to PCLATH=HI of program counter
        movfw   W_TEMP          ;restore w
        addlw   low TABLE       ;add start address to table entry
byte
        btfsc   STATUS, C       ;are we going over page boundary?
        incf    PCLATH, f       ;yes, so change page
        movwf   PCL             ;no, calculate jump
TABLE
        retlw   .151            ;128 (MSB) is added to actual
        retlw   .151            ;number to indicate negative values!!
        retlw   .150
        retlw   .150
        retlw   .149
        retlw   .149
        retlw   .148
        retlw   .148



--- Jim Tellier <jimtellier@COX.NET> wrote:
> OK, this seems embarassingly simple, but...
> For midrange PIC (16F877), I write:
>     movlw    0
>     call        getvalue
>     ...
> getvalue:
>     addwf    PCL, F
>     retlw      B'10100000'
>     ...etc.
>
> All code is within page 0 (< 2048 bytes).  Single
> step thru, upon exec the 'addwf' the simulator says
> W=0, but the retlw isn't executed... control jumps
> off into middle of some other code.
> I'd swear I've used this construction before, but
> this isn't flyin'!  Any ideas?   Thanks!
> Jim
>
> --
> http://www.piclist.com hint: To leave the PICList
> mailto:piclist-unsubscribe-request@mitvma.mit.edu


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