Expanding the rergister module.

I decided to expand the register module of my SAP 1 computer that I built in this blog firstly I attached the final bus LED's and linked up the bus connections:

The green wires are where I will connect the module to the bus.

Unlike Ben's design, I will not be connecting the 'B' register on my design to the bus, so I only need a D register for this, I chose a 74HCT574. This is a functionally the same as a '374, but with all the inputs on one side, and the outputs on the other, making wiring much easier.

I wired in the inputs to the connections to the A register chips, to make the wiring easier.

And finished. The connections for the B register LED's will be used to connect to the ALU which I plan to connect to the bottom of this board.