Posibus to Negibus Converter
<UL>
<LI><b>dw08a2s</b> is a two-sided board based on DEC's DW08A Posibus
Converter backplane.</LI>
<LI><b>dw08aholes</b> is a version of dw08a2s with un-needed cutout holes,
and only 6 mil traces (too thin).</LI>
<LI><b>dw08a</b> is dw08aholes with the power traces beefed up, and is
the version that matches the prototypes.  It has a mechanical interference
fit at the right edge.</LI>
<LI><b>dw08aRev2</b> is a version of the dw08a backplane with the
interference fit fixed, and the un-needed holes removed.</LI>
<LI><b>dw08aRev3</b> is a version of the dw08a backplane that fixes another
interference fit, having to do with the backplane being more than 3U tall.</LI>
<LI><b>dw08a4lyr</b> is a four layer version, with all the traces
beefed up.</LI>