RetroComputers Mod: Programmable Computers and Redstone Integration in Minecraft
Minecraft has always been a game of boundless creativity, but sometimes you want more than just redstone dust and repeaters to build complex logic. The RetroComputers mod brings fully programmable computers into your blocky world, heavily inspired by the beloved RedPower 2 computers. If you ever dreamed of writing code to control your redstone contraptions, automate sorting systems, or even scan players for security, this mod delivers a nostalgic yet powerful experience.
What Makes RetroComputers Special
Unlike basic command block setups, RetroComputers gives you a complete ecosystem of blocks and items that mimic real retro computing hardware. You craft a central Computer block, insert an XC8010 CPU, and connect peripherals like Terminals, Disk Drives, and Memory Expansions using Ribbon Cables. The star of the show is the Terminal, which features a beautiful CRT effect that instantly transports you back to the era of green phosphor monitors. The mod runs a custom FORTH-based operating system, so you’ll be typing commands and loading programs from Floppy Disks rather than clicking through GUIs.
Core Blocks and Items
Here’s a quick rundown of everything you can build and tinker with:
- Computer: The heart of the system. Right-click its back to insert the CPU.
- Terminal: Your window into the computer’s soul. Displays output and accepts keyboard input with a nostalgic scanline filter.
- Disk Drive: Reads boot disks and program disks. Insert a FORTH Boot Disk to start the OS.
- Backplane / Memory Expansion: The built-in 8KB of memory won’t get you far. Each Memory Expansion adds 8KB, up to 56KB extra, for a total of 64KB.
- Analog Redstone Port: Outputs variable redstone signal strength based on your program’s calculations.
- Redstone Port: Sends signals to bundled cables, perfect for compact redstone networks.
- Wireless Transceiver: Transmits data between computers without a physical connection.
- Retinal Scanner: Scans players and triggers actions—ideal for secure doors or custom permissions.
- Ribbon Cable: Connects all peripherals together in a tidy chain.
- Sortron: Integrates with Teckle tubes to create an advanced sorting machine that you can program.
- XC8010 CPU: The standard processor, very similar to RP2’s CPU but not code-compatible (no BASIC yet).
- Floppy Disk: A writable 256KB storage medium for your own programs.
- FORTH Boot Disk: Three variants exist, each loading the FORTH environment.
- Program Disks: Found in dungeon and mineshaft chests, containing utilities for the Transceiver, Retinal Scanner, Sortron, or a decompiler.
- Screwdriver: Changes peripheral bus addresses, essential when you have multiple identical devices in one network.
Setting Up Your First Computer
Getting started feels like assembling a vintage PC. First, craft a Computer, an XC8010 CPU, a Disk Drive, any FORTH Boot Disk, and a Terminal. Place the Computer block, then right-click its back with the CPU to install it. Position the Disk Drive and Terminal adjacent to the Computer—no Ribbon Cables are strictly required for this basic setup, but they help organize larger networks. Insert the boot disk into the drive, right-click the Computer to open its GUI, and flip the power switch on the right. The Terminal will come alive, and you can begin typing FORTH commands immediately.
Expanding Memory and Adding Peripherals
The default 8KB of memory is enough for tiny scripts, but serious automation demands more. Craft a Backplane and several Memory Expansions. Place the Backplane next to the Computer, then attach up to seven Memory Expansions to it, each granting an additional 8KB. Once your memory is sorted, start wiring up Redstone Ports to control pistons, doors, or lamps. The Analog Redstone Port is particularly clever—you can output a signal strength between 0 and 15 directly from your code, enabling smooth dimming or variable speed controls.
Advanced Automation: Wireless, Sorting, and Security
RetroComputers truly shines when you combine its more exotic components. The Wireless Transceiver allows remote communication between computers, so you can build a distributed factory floor where one master machine coordinates several slave units. The Sortron links to Teckle tubes and acts as a programmable sorting machine—perfect for massive storage systems. For adventure maps or multiplayer servers, the Retinal Scanner checks a player’s identity and can trigger redstone signals to open doors, dispense items, or log entries. Program disks found in loot chests often contain pre-made utilities for these devices, saving you from writing everything from scratch.
When you’re ready to dive deeper, the Screwdriver becomes your best friend. Every peripheral has a default bus address, but if you want to use two Terminals or two Disk Drives on the same computer, you’ll need to assign each a unique address. It’s a small detail that adds enormous flexibility to complex builds. If you’re looking for a hassle-free way to try RetroComputers, the foxygame.net launcher lets you download and install the mod directly from its menu, streamlining the entire process so you can focus on coding instead of file management.
Programming and the FORTH Environment
The operating system is FORTH, a stack-based language that might feel unfamiliar at first but becomes intuitive with practice. Commands are typed in the Terminal, and you can save your programs onto blank Floppy Disks for later use. While the mod doesn’t yet include BASIC like its RedPower 2 inspiration, the existing FORTH environment is fully capable of controlling every peripheral. Look for program disks in dungeon chests—they often contain ready-to-run scripts for the Transceiver or Retinal Scanner, and a decompiler disk lets you peek at how they work to learn the syntax.
Compatibility and Requirements
RetroComputers requires three library mods to function: Forgelin, QuackLib, and MCMultiPart. Make sure all are present in your mods folder, otherwise the game will crash. The mod is still relatively new, so expect occasional bugs; the developer actively encourages feedback and bug reports. It’s designed for Minecraft versions that support these libraries, so check your game version before installing.
Final Thoughts
RetroComputers fills a niche that many technical players have missed since the days of RedPower 2. It doesn’t just add a computer block—it delivers a whole ecosystem of programmable peripherals that integrate deeply with redstone and item transport. Whether you want to build a secure vault with retinal scanners, a wireless redstone network, or a fully automated sorting facility, this mod provides the tools to do it with a charming retro aesthetic. The learning curve is real, but the satisfaction of watching your FORTH code control a factory is unmatched. Give it a try, experiment with the looted program disks, and don’t hesitate to share your creations with the community.