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hoglet67 / PiTubeDirect

Bare-metal Raspberry Pi project that attaches to the Acorn TUBE interface and emulates many BBC Micro Co Processors
GNU General Public License v3.0
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PiTubeDirect

PiTubeDirect is a low cost Second Processor project for Acorn's 8-bit machines (Beeb, Master, Electron, Atom) which uses two cheap chips to interface a Raspberry Pi to the Tube connector.

The Pi emulates one of a number of CPUs, and also the Tube interface chip.

A Pi Zero can emulate a 6502 Second Processor running at 274MHz.

For more information, see the project Wiki.

Here's the minimal configuration, using a Pi Zero and a DIY two-chip level shifter: minimal configuration

Benchmark results for the 65C02 Second Processor: benchmark results