How it started

Back in 2019 Bart created the first chat cartridge as a proof of concept.
Unlike today's cartridge, this first version did not use the ESP32, it used an Arduino Nano with an ESP8266 Serial module for the WiFi communication. The project evolved, and in 2021 it was ready for larger-scale testing. Bart crafted 10 cartridges and distributed them freely to anyone eager to partake in the experiment.
A few successful chat sessions were done, but it was quite a slow process.
Here is a picture of what it looked like back then:
Start screen in 2021
The start screen was in black and white, but the chat screen was nice and colorful.

Version 2.0, a fresh start


In 2023, Theo got in touch with Bart and convinced him to revive the Chat64 project. They teamed up to redesign the hardware and rewrite the software from scratch.
They introduced new functionality such as private chat and even an A.I. Chatbot.
The hardware and all software is now open source and available on Github.
Bart and Theo Theo
Bart and Theo testing software Theo soldering a proto type

Features


The main feature of the cartridge is communications, users from various 8-bit computers can chat in a single room. Additionally, users can send private messages to each other for one-on-one conversations. And if there’s no one around to chat with, don’t worry—Eliza, our A.I. chatbot, is always available. Ask her anything and enjoy an engaging conversation!

  > Chat with other 8-bit enthusiasts across multiple platforms.
  > Unlock the power of A.I. with Eliza, our interactive chatbot.
  > The cartridge get automatic updates from our webserver, it stays up to date!

Eliza


Eliza is our A.I. chatbot, unlike the old Eliza you may remember from back in the day. This is true A.I.—Eliza on steroids, if you will.
Here is a bit of conversation with Eliza:
eliza screenshot

Tested platforms


The Chat64 cartridge was developed for the original C64 hardware but can be used on modern C64 compatible platforms as well.
We know the cartridge works well on the following systems:

Original Hardware

The Cartridge has been tested on most revisions of the original Commodore 64 and Commodore 64c.

c64

The C128 and C128D

Users have reported full functionality on the C128 and C128D.
c128

The Mega65

Users have reported full functionality on the Mega65.





For more info about the Mega65, goto: mega65.org
mega65

The C64 Reloaded MK2

Users have reported full functionality on the C64 Reloaded MK2.
More info about the Reloaded MK2:
http://wiki.icomp.de/wiki/C64_reloaded_mk2
C64reloadedMk2

The Ultimate64

Users have reported full functionality on different versions of the Ultimate64 (elite).
Note that the cartridge uses its own Wi-Fi connection and does not utilize the Ultimate64's network capabilities.







More info: https://ultimate64.com/
Ultimate64

ZX Spectrum 48k

The ZX Spectrum cartridge has been develloped for the 48k version of the original ZX Spectrum
We have tested this cartridge on several version 3 mainboards and a version 1 mainboard without issues.

The 16k spectrum model will not work, we need the extra memory for fast switching between the chats and from chat to menu and back


48k ZX Spectrum

ZX Spectrum 128k (toastrack)

We have not tested this personally but other users have reported full functionality on the ZX Spectrum 128k
ZX Spectrum 128k

Harlequin 128k

We have not tested this personally but other users have reported full functionality on the Harlequin 128k
Harlequin 128k


Media

Retro Recipes

In 2024 the Chat cartridge got featured on Perifractic's Retro Recipes:


Zapp!64

Chat64 was covered as a new flash article in Zapp!64, issue 19 Mar-Apr 2024