Update: There is a v6 but the only difference is a jumper to select internal (Apple expansion bus) vs. external (USB) power.

https://github.com/tjboldt/Apple2-IO-RPi

Purpose

The purpose of this project is to provide I/O for an Apple II series 8 bit computer via a Raspberry Pi Zero W which is powered by the Apple II expansion bus. This includes using the attached RPi Zero W for it's storage, network and processor to provide new functionality for the Apple II.

Project Status

So far, this is a project and not a finished product. The current prototype is on the fifth revision and a few have been assembled and tested. It is now possible for the Apple II to boot from and write to a virutal hard drive image stored on the RPi in any slot and execute simple commands on the RPi via the Apple II. The code has very few tests and is incomplete. Note that currently the firmware assumes an 80 column card is in slot 3 and than you have lowercase support. If you have a problem or idea for enhancement, log an issue here. I recommend starring/watching the project for updates on GitHub. You are welcome to fork the project and submit pull requests which I will review.

Features

Boot menu which waits for RPi to be ready

ProDOS bootable drive from image stored on RPi

Execute Linux commands on the RPi from the Apple II

Load binary files directly from the RPi to the II

Update Apple II firmware in place from image on RPi

Supports two drive images at the same time (Note: backward compatible with previous firmware but requires firmware update in order to work with two drives)