Hi, Paul1981, thanks for that, you're right what i thought was partially blocked off, it was half covered with a jumper, so i took that off and now C is the only one with jumper cover over (Its actually labelled ABCD on the card)
So the only thing that was confusing me was the 8 dil socket, the way i read the instructions is that an 8 dil socket is used aswell as the oscillator and the 8dil socket/crystal combo is inserted into the empty socket of the 1220 with the notches in alignment. Daedalus had said that the 8 dil socket wasn't used :confused: