2022年01月21日(金)
As surprising as it may be, there are cases where the two cartridge ports on the PCjr are not enough. If you need more than two ports, or need to have a peripheral/cartridge sitting outside the slot due to excessive thickness or for easy probing during development, consider the TwinPort Jr.!
Available in ready to use (assembled) and DIY kits (not assembled).
詳しくはこちら