I really should wait a while before posting a reply. Since writing the above I have come across the following which may be what I am looking for:-

'************************************************* ***************
'* 12F629.BAS *
'* *
'* By : Leonard Zerman, Jeff Schmoyer *
'* Notice : Copyright (c) 2002 microEngineering Labs, Inc. *
'* All Rights Reserved *
'* Date : 06/04/02 *
'* Version : 2.42 *
'* Notes : *
'************************************************* ***************

BANK0 $0020, $005F
EEPROM $2100, $217F
LIBRARY "PBPPIC14"

include "PIC14EXT.BAS"

PORTL VAR GPIO
PORTH VAR GPIO
TRISL VAR TRISIO
TRISH VAR TRISIO

include "PBPPIC14.RAM"

'*-----------------------* EOF 12F629.BAS *---------------------*

It appears to be a generic header for the 12f629 afterwhich the main program is written. If so can you 'decifer' it for me, ie are the ports set up as ins or outs and are they set high or low to begin?

Thanks