> Anyone have a piece of code they might be willing to share

Some pretty good hints here

http://www.piclist.com/techref/microchip/tables.htm

I've got project routines for Flash reads on a 16F877 with 3
really huge tables but I'd need to tidy them up (ie add more
comments, maybe labels too) before posting

A taster - the tables are cross-referenced. A number input to the
PIC from a PC actually refers to a bit in memory, not a whole
14-bit byte, which explains the "0:13". The input number is /14
to find the byte and remainder is the bit in the next byte. That part
is fairly simple, the whole thing is more complicated, as a randomiser
is also included for generating look-ups. It's a gambling application

;================================================
;        Read flash memory
;================================================

;increment target address if division result > 0:13

readf    bank0
         movf   addl,w        ;pre-load address low
         btfss  res_eq0       ;check non-zero flag. If set then result > 0
         goto   $+5           ;else use pre-loaded address low value

         incfsz addl,w        ;base + offset + 1
         goto   $+3
         incf   add1h,f       ;increment high address if low rollover
         incf   add2h,f
         movwf  addlow        ;low address for this routine

;------- entry point for random routine

getrnd   movf   addhigh,w     ;table 1 or 2 address high
         bank2
         movwf  eeadrh

         bank0
         movf   addlow,w      ;address low
         bank2
         movwf  eeadr

         bank3
         bsf    eecon1,eepgd
         bsf    eecon1,rd
         nop
         nop
         nop
         nop
         bank2
         movf   eedata,w
         bank0
         movwf  lo
         bank2
         movf   eedath,w
         bank0
         movwf  hi
         return

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