It's really an "IF PORTA" command, rather than an IF command with the pins being specified as being on PORTA, thus there should only be one PORTA immediately after the IF and once that appears then all pin references refer to those on PORTA, so -<code><pre><font size=2 face='Courier'> IF PORTA pin0 = 1 AND pin1 = 1 THEN dcf77 </font></pre></code> both pin0 and pin1 will refer to pins on the PORTA.