As I suspected, John would have an excellent solution. But he
inadvertantly sent it to only me:

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From: John Payson <supercat@Mcs.Net>
Message-Id: <199708271827.NAA22816@Venus.mcs.net>
Subject: Re: Bit Banging Beckoning
To: sdattalo@unix.SRI.COM
Date: Wed, 27 Aug 1997 13:27:11 -0500 (CDT)
In-Reply-To:  <34046293.3FEC@unix.sri.com> from "Scott Dattalo" at Aug 27, 97
 10:23:31 am
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Content-Type: text

>    A   |    B
> -------+--------
>   00   |   000
>   01   |   001
>   10   |   011
>   11   |   111

        clrf    B
        btfsc   A,1
        bsf     B,0
        btfsc   A,1
        bsf     B,1
        bsf     C
        btfsc   A,0
         rlf    B

Should be 17 points I think, right?