r/retrobattlestations • u/daxx2k • 11h ago
Show-and-Tell My 1989 Atari Portfolio now talks back — a SKYNET-inspired expansion project
I wanted to give my Atari Portfolio something new to do while keeping its original keyboard and LCD at the centre of the experience.
The result is the Portfolio AI Interface: an ESP32-S3 expansion module connected through the original Atari Serial Interface and an RS-232 level converter. A small DOS client runs from an apfRAM memory card.
It supports typed and spoken AI conversations, camera image descriptions and background synthwave radio. The AI runs online through the OpenAI API; the Portfolio provides the terminal interface.
Getting the serial communication, speech playback and tiny-screen layout working together took some iteration. I also designed an enclosure to match the original expansion modules, including a speaker grille inspired by the Portfolio.
The Terminator 2 connection was impossible to resist.
Build and demo:
Code, wiring documentation and print files are linked in the video description.




