This is a Buy-It-Now sale for an internal Raspberry Pi CoProcessor kit, for the Acorn BBC Master 128. INTERNAL RASPBERRY PI COPROCESSOR WITH HDMI OUTPUT. The Raspberry Pi CoProcessor fitted to this kit is a Pi Model 3A+, running the latest Indigo firmware, also known as a PiTubeDirect, at 1.2GHz (See the GitHub project page for more info).