Hi again,
Just a thought,
I'm not sure if this is different on the 17x series,
but on 16x NEVER trust PCLATH, if you are doing manual pcl
'adjustment' never forget to ALSO set PCLATH.
I think this macro could work:

;+++++
;       TABLE_JUMP Calculates an eventuntual table boundary crossing  =

;       set's up the PCLATH register correctly
;       Offset must be in w-reg, offset 0 jumps to the next instr. =

;
TABLE_JUMP      MACRO   =

        MOVWF   Table_Temp      ; save wanted offset
        MOVLW   LOW($+8)        ; get low adress ( of first instr. after
macro )
        ADDWF   Table_Temp,F    ; add offset
        MOVLW   HIGH($+6)       ; get highest 5 bits ( of first instr.
after macro )
        BTFSC   STATUS,C        ; page crossed ? ( 256 byte )
        ADDLW   0x01            ; Yes add one to high adress
        MOVWF   PCLATH          ; load high adress in latch
        MOVF    Table_Temp,W    ; get computed adress
        MOVWF   PCL                ; And jump
        ENDM

Drawback, one dedicated byte of ram ( but trust me it's worth it :) )

/Tony



Tony K=FCbek, Flintab AB            =

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E-mail: tony.kubek@flintab.com
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