DMA based memory loader circuit boards have arrived

 PCB SHIELD FOR ARDUINO

I have received the circuit board that will plug on the top of an Arduino Mega 2560 and implement the function. I will solder on the chips and other parts soon so that once the 1130 is working sufficiently well to do memory cycles and cycle steal, I can test out my design.

HEADERS TO ISOLATE WIREWRAP FROM THE LOADER BOARD

I wanted the wires that will be linked to specific backplane (in IBM-speak, the board) pins to interface my loader to the 1130s logic. The header goes above the board at the top of the gate and I will use wirewrap to make connections between header and board pins. 

Cables will connect the headers to the shield PCB on the Arduino.