AA is the 12th pin on the lower row. On Mon, Sep 18, 2017 at 8:50 PM, Steve Malikoff via cctalk < [email protected]> wrote:
> Chuck said > > Is pin AA == pin 1 or pin 40 ? > > > > When using modern replacement connectors with keys and marked pin 1, > > the translation seems to be pin AA == pin 40. > > > > Did DEC have an accepted mapping between the alphabet and numbers? > > > > -chuck > > Not sure if this helps, as its the serial connector > http://www.retrocmp.com/how-tos/interfacing-to-a-pdp-1105/ > 144-interfacing-with-a-pdp-1105-sorting-the-wires > > Personally, it's a well-meaning page on a great site, but it confuses my > newbie knowledge greatly when it says the upper > table should be mounted on every PDP-11, then reckons the lower table is > the / 05 one. The above /05 photo appears to > correspond to the upper table but the lower table is the inverted SCL on > the /05... is it not????? It could do with more > annotation I think. Otherwise, it's WTF for me. > I suppose when I get to powering up my /05 I should of course sanity check > other references so I don't fry anything. > > Steve. > > >
