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OpenComputers Mod — Reference

Contents (9)
  1. Core Computer Hardware
  2. Computer Cases
  3. Essential Components
  4. Peripheral Blocks
  5. Display and Input
  6. Networking and Power
  7. Specialized Blocks
  8. Crafting Materials
  9. Nanomachines

Core Computer Hardware

To function, a computer requires a Case, a CPU, RAM, a Graphics Card (GPU), a Screen, and an Operating System (usually OpenOS on a Hard Disk Drive).

Computer Cases

Cases come in three tiers, determining how many component slots and expansion card slots are available.

Tier Card Slots Component Slots Memory Slots Description
Tier 1 1 2 2 Basic iron-based case for simple tasks.
Tier 2 2 3 2 Gold-based case with more expansion room.
Tier 3 3 4 2 Diamond-based case for high-end automation.
Creative 3 9 3 Infinite power and maximum slots.

Essential Components

  • CPU (Central Processing Unit): Determines the number of components the computer can manage. Tiers 1, 2, and 3 increase the component limit.
  • Memory (RAM): Required to run programs. If a program exceeds the available RAM, the computer will crash with an "out of memory" error.
  • Graphics Card (GPU): Controls the output to a Screen. Higher tiers support higher resolutions and more colors.
  • Hard Disk Drive (HDD): Permanent storage for files and the Operating System.
  • EEPROM: Contains the bootloader (BIOS). A computer cannot start without an EEPROM programmed with Lua code (typically the 'Lua BIOS').

Peripheral Blocks

Display and Input

  • Screen: Displays text and graphics. Screens can be placed next to each other to form a single large display. Tier 2 and 3 screens support color.
  • Keyboard: Must be attached to a screen (or placed adjacent) to allow player input.
  • Hologram Projector: A high-end device that projects a 3D voxel grid into the air, useful for maps or data visualization.

Networking and Power

  • Power Converter: Converts external energy (RF, EU, etc.) into OpenComputers' internal energy buffer.
  • Capacitor: Stores energy for the computer network. Essential for handling power spikes.
  • Cable: Connects blocks in a network. Components connected via cables can communicate with the computer.
  • Switch: Connects different networks while filtering traffic to prevent packet collisions.

Specialized Blocks

  • Adapter: Allows the computer to interact with non-OpenComputers blocks, such as chests, furnaces, or machines from other mods (e.g., IndustrialCraft 2, Thermal Expansion).
  • Disk Drive: Allows the reading and writing of Floppy Disks.
  • Geolyzer: Scans the surrounding terrain to detect ore density and block hardness.
  • 3D Printer: Uses Chamelium and Ink to print custom decorative or functional blocks designed in Lua.

Crafting Materials

Crafting in OpenComputers is tiered and progressive. Most high-level components require several sub-components:

  • Transistor: The most basic building block, used in almost every recipe.
  • Microchip (Tier 1-3): Used to create CPUs, RAM, and complex cards.
  • Printed Circuit Board (PCB): Created by treating an Unprepared PCB with acid (usually involving water and gold/iron dust).
  • Control Unit: A high-tier component used for building Computer Cases and Robots.
  • Chamelium: A synthetic material used as 'filament' for the 3D Printer.

Nanomachines

Nanomachines are a late-game mechanic where the player can inject themselves with a Nanomachine Controller. By using a Nanomachine Remote, players can trigger various buffs (Speed, Strength, Night Vision) or abilities (Flight) by configuring the internal neural network of the nanites. These require a constant supply of energy, which can be provided by standing near a Wireless Charger.