More work building 1627 plotter controller card for IBM 1130

FINAL COMPONENTS INSTALLED

I soldered down the linear voltage regulator and the remaining logic chip - a 74LS05 open collector hex inverter. I then placed all the resistors and capacitors onto the board. 

The pads across the top are where the spring contacts will be soldered. Those contacts will slide over the pins on the 1130's backplane board where the 5806223 card from IBM would be installed. Of the 48 positions total across the two sockets, 21 are not used. Three pins are used to deliver power and ground the the card, with the remainder carrying signals between the card, the IBM 1130 system and the plotter (IBM 1627, Calcomp 565 or Calcomp 563).