This little board brings out pin headers for device 0 and 1 on the Pi’s SPI0 interface. Each has a jumper for connecting/disconnecting 3.3v power from the header pins.
It also brings out the UART pins from the Pi, for convenient debug connections.
This is used as a convenient way to program the ROMulator, along with general purpose convenience for SPI/UART connections.
This comes as a kit, including the following:
Breakout board PCB
Header pins for SPI0 header and 3.3v jumper header
2×20 socket for connection to the Pi
10-pin F-F ribbon cable.