SidecarTridge Multi-device for Atari ST

A multi-device emulator for the Atari ST, STE, and Mega series on Raspberry Pi Pico steroids

SidecarTridge Multi-device (aka The SidecarT) is a state-of-the-art multi-device emulator crafted for the Atari ST, STE, and Mega series. It leverages the robust capabilities of the RP2040 microcontroller found in the Raspberry Pi Pico, enabling it to:

• Emulate both 64Kbyte and 128Kbyte ROMs by simply loading the binary files from a microSD card or via a Wi-Fi connection.

• Interact with the cartridge bus in real-time for data reading and writing, which allows for seamless emulation of devices such as floppy disks, hard disks, real-time clocks, keyboards, mouse devices, and more.

• Dive into a realm of possibilities, limited only by your creativity. Thanks to its open architecture and the open-source code, SidecarTridge can evolve to meet any challenge you envision.

Features

• Versatile ROM Emulation: Easily emulate 64Kbyte and 128Kbyte ROMs. Switching between ROMs is a breeze—simply load the binary files either from a microSD card or directly via a Wifi connection.

• Real-time Cartridge Bus Interaction: It isn’t just for ROMs. It’s built to interact with the cartridge bus on-the-fly, making data reading and writing seamless. This real-time integration allows for an enriched experience, especially when emulating devices.

• Diverse Device Emulation: From hard disks and floppy disks to real-time clocks, keyboards, and mouse devices and more. Its advanced capabilities ensure you get an authentic emulation experience across a range of devices.

• Open Source & Customizable: At its core, it is designed for innovation. With open-source code and architecture, you have the freedom to tweak, modify, and expand its functionalities. It’s not just an emulator—it’s a canvas for all your tech endeavors.

• Powered by Raspberry Pi Pico: Thanks to the prowess of the RP2040 microcontroller in the Raspberry Pi Pico, it delivers exceptional performance and reliability. It’s the perfect blend of old-school charm and modern-day tech.

• Ever-evolving Capabilities: The world of Atari ST and its series is vast, a major retro platform. It is built to evolve, ensuring that you’re always at the forefront of emulation technology.

How It Works

Getting started with the device is straightforward and intuitive. Here’s a step-by-step guide:

1. Setup the Hardware: Ensure that the Atari ST computer is powered off. Insert the device into the Atari ST’s lateral cartridge interface and power on the computer.

2. Initiate the device: Hold down the SELECT button on the device for more than one second and run the SIDECART.TOS application.

3. Obtain your ROMs, Floppy images or hard disk files: Using the Atari ST interface, you can easily connect to the web. Dive in, explore, and download your favorite ROMs, Floppy images or hard disk files from the curated lists we’ve prepared. It’s a seamless experience, connecting you directly to HTTP servers for your convenience.

4. Choose Your Functionality: You’ll have an option to select the function of the device. You can emulate a ROM, a Floppy Drive, a Hard disk drive and a Real Time Clock out of the box.

5. Start the Emulation: Either reset your Atari ST computer or power cycle it. The Multi-device will now operate as the selected emulated device (External ROM, floppy, hard disk, real time clock, etc.). This behavior persists even if you switch the computer on and off. If you wish to emulate a device or use another function, simply start over from the second step.

6. Dive In and Enjoy: With everything set up, all that’s left is for you to enjoy the immersive experience!

Video Gallery

Frequently Asked Questions

Should I use a Raspberry Pi Pico WH or W?

The device is compatible with both the Raspberry Pi Pico WH and W. The Raspberry Pi Pico WH (Reference SC0919) comes with the necessary 40-pin connectors to attach to the SidecarTridge’s motherboard. If you opt for the Raspberry Pi Pico W (Reference SC0918), you’ll need to procure two 20-pin connectors and solder them to the board yourself that you can find the store.

Can I use a Raspberry Pi Pico?

No, it is not compatible with the Raspberry Pi Pico. It requires the Infineon CYW43439 Wifi/Bluetooth module, which is only available in the Raspberry Pi Pico WH and W.

I want to develop my own firmware for the device. What is the right Pico to use?

The Raspberry Pi Pico WH is the right choice. It bundles a JST SH 3x1mm male connector on top of the board, which connects to the Raspberry Pi Debug board. Also don’t forget to get a two JST SH 3x1mm female cable for the UART connection. You can learn more in this guide.

What is the difference between the Multi-device and the TOS emulator?

They are different beasts. The Multi-device connects to the expansion port and can emulate different devices like external ROM (but not the TOS ROM), floppy, RTC, hard disk, etc. It works as an expansion device, not a replacement for an existing computer part. The TOS emulator replaces the internal ROM TOS with a custom board, making it as easy to change TOS versions as it is to change files in RAM.

Is the SidecarTridge Multi-device for me?

This is a homebrew product designed for hobbyists with a keen interest in experimenting with their computers. If you seek a seamless, Apple-like experience, it will not meet your expectations.

Can the device harm my computer?

It has undergone extensive testing on various Atari ST, STE, MegaST, and MegaSTE computers featuring diverse TOS versions. However, it’s important to note that this version does not support Atari TT, Falcon computers, and their clones. While heavily modified and customized computers are likely compatible, it’s up to you to decide to use the device. As a rule of thumb, it’s guaranteed to work with any computer at 8Mhz speed.

Why are you open-sourcing the code?

Adopting the General Purpose License for the source code is my way of ensuring that the benefits belong to the community at large, rather than being held by a particular individual or entity.

Why are you open-sourcing the design with restrictions?

The essence of this project lies in community involvement and sheer passion, not profit-making. It’s disheartening to envision entities or individuals merely reproducing the design for commercial gains without adding any substantial value. While I’m completely supportive of enthusiasts creating their own device for personal use or for fellow aficionados, those aiming for monetary benefits should recognize the efforts and intentions behind this initiative. If profits are to be made, they should rightfully support the original creator.

Are device-compatible devices for sale in other online stores official?

No, they are not. If someone is trying to sell you a compatible device, it is not endorsed by the project or me. These devices are pirated designs and violate the license agreement. You can report any such instances to legal@sidecartridge.com for further action. Remember, any brand-new clone sold for profit is not an official product.

Can I contribute to the project?

Of course! Please visit the Documentation site page to learn how to start contributing to the project! No matter if you are a microcontroller ninja, an Atari ST guru, or a C aficionado. You are welcome!

Where can I find ROM images?

I have gathered some images in this directory. You can download them, or simply connect the device to your Wi-Fi and browse the catalog online from your Atari ST!

Where can I find floppy images?

Just like in Soviet Russia, you don’t need to find applications. The applications find you! You can use the embedded application search engine to find the application you need. Just type the name of the application and press enter. The floppy disk image with the application will be automatically downloaded and launched.

Why don’t you ship to some European countries?

I’ve made the difficult decision to discontinue shipping to Austria, Bulgaria, Cyprus, France, Greece, Latvia, Lithuania, Luxembourg, Portugal, Romania, Slovakia, Spain and Sweden. This decision was not made lightly and is primarily due to the specific and significant costs associated with recycling packaging and electronics in these countries. Unfortunately, these costs are disproportionately high relative to the demand I’ve experienced, making it unsustainable for me to offer the products in these markets while adhering strictly to the legal requirements.

However, you can still find this and other products in various marketplaces like eBay, Tindie and others with a simple search.