diff --git a/src/main/java/li/cil/oc2/common/Config.java b/src/main/java/li/cil/oc2/common/Config.java
index 1c4ff161..ce97475f 100644
--- a/src/main/java/li/cil/oc2/common/Config.java
+++ b/src/main/java/li/cil/oc2/common/Config.java
@@ -1,9 +1,83 @@
 package li.cil.oc2.common;
 
-public final class Config {
-    public static long maxAllocatedData = 512 * Constants.MEGABYTE;
+import li.cil.oc2.api.API;
+import net.minecraftforge.common.ForgeConfigSpec;
+import net.minecraftforge.eventbus.api.SubscribeEvent;
+import net.minecraftforge.fml.ModLoadingContext;
+import net.minecraftforge.fml.common.Mod;
+import net.minecraftforge.fml.config.ModConfig;
+import org.apache.commons.lang3.tuple.Pair;
 
+@Mod.EventBusSubscriber(modid = API.MOD_ID, bus = Mod.EventBusSubscriber.Bus.MOD)
+public final class Config {
+    private static final CommonSettings COMMON_INSTANCE;
+    private static final ForgeConfigSpec COMMON_SPEC;
+
+    ///////////////////////////////////////////////////////////////////
+
+    public static long maxAllocatedMemory = 512 * Constants.MEGABYTE;
     public static int maxMemorySize = 8 * Constants.MEGABYTE;
     public static int maxHardDriveSize = 8 * Constants.MEGABYTE;
     public static int maxFlashMemorySize = 4 * Constants.KILOBYTE;
+
+    ///////////////////////////////////////////////////////////////////
+
+    static {
+        final Pair<CommonSettings, ForgeConfigSpec> commonConfig = new ForgeConfigSpec.Builder().configure(CommonSettings::new);
+        COMMON_INSTANCE = commonConfig.getKey();
+        COMMON_SPEC = commonConfig.getValue();
+    }
+
+    ///////////////////////////////////////////////////////////////////
+
+    public static void initialize() {
+        ModLoadingContext.get().registerConfig(ModConfig.Type.COMMON, COMMON_SPEC);
+    }
+
+    ///////////////////////////////////////////////////////////////////
+
+    @SubscribeEvent
+    public static void handleModConfigEvent(final ModConfig.ModConfigEvent event) {
+        if (event.getConfig().getSpec() == COMMON_SPEC) {
+            maxAllocatedMemory = COMMON_INSTANCE.maxAllocatedMemory.get();
+            maxMemorySize = COMMON_INSTANCE.maxMemorySize.get();
+            maxHardDriveSize = COMMON_INSTANCE.maxHardDriveSize.get();
+            maxFlashMemorySize = COMMON_INSTANCE.maxFlashMemorySize.get();
+        }
+    }
+
+    ///////////////////////////////////////////////////////////////////
+
+    private static final class CommonSettings {
+        public ForgeConfigSpec.LongValue maxAllocatedMemory;
+        public ForgeConfigSpec.IntValue maxMemorySize;
+        public ForgeConfigSpec.IntValue maxHardDriveSize;
+        public ForgeConfigSpec.IntValue maxFlashMemorySize;
+
+        public CommonSettings(final ForgeConfigSpec.Builder builder) {
+            builder.push("vm");
+
+            maxAllocatedMemory = builder
+                    .translation(Constants.CONFIG_MAX_ALLOCATED_MEMORY)
+                    .comment("The maximum amount of memory that may be allocated to run virtual machines.")
+                    .defineInRange("maxAllocatedMemory", Config.maxAllocatedMemory, 0L, 64L * Constants.GIGABYTE);
+
+            maxMemorySize = builder
+                    .translation(Constants.CONFIG_MAX_MEMORY_SIZE)
+                    .comment("The maximum size of a single memory device.")
+                    .defineInRange("maxMemorySize", Config.maxMemorySize, 0, 256 * Constants.MEGABYTE);
+
+            maxHardDriveSize = builder
+                    .translation(Constants.CONFIG_MAX_HARD_DRIVE_SIZE)
+                    .comment("The maximum size of a single hard drive device.")
+                    .defineInRange("maxHardDriveSize", Config.maxHardDriveSize, 0, 512 * Constants.MEGABYTE);
+
+            maxFlashMemorySize = builder
+                    .translation(Constants.CONFIG_MAX_FLASH_MEMORY_SIZE)
+                    .comment("The maximum size of a single flash memory device.")
+                    .defineInRange("maxFlashMemorySize", Config.maxFlashMemorySize, 0, 128 * Constants.MEGABYTE);
+
+            builder.pop();
+        }
+    }
 }
diff --git a/src/main/java/li/cil/oc2/common/Constants.java b/src/main/java/li/cil/oc2/common/Constants.java
index 64834830..be7c24e3 100644
--- a/src/main/java/li/cil/oc2/common/Constants.java
+++ b/src/main/java/li/cil/oc2/common/Constants.java
@@ -3,6 +3,7 @@ package li.cil.oc2.common;
 public final class Constants {
     public static final int KILOBYTE = 1024;
     public static final int MEGABYTE = 1024 * KILOBYTE;
+    public static final int GIGABYTE = 1024 * MEGABYTE;
 
     ///////////////////////////////////////////////////////////////////
 
@@ -27,6 +28,13 @@ public final class Constants {
 
     ///////////////////////////////////////////////////////////////////
 
+    public static final String CONFIG_MAX_ALLOCATED_MEMORY = "config.oc2.maxAllocatedMemory";
+    public static final String CONFIG_MAX_MEMORY_SIZE = "config.oc2.maxMemorySize";
+    public static final String CONFIG_MAX_HARD_DRIVE_SIZE = "config.oc2.maxHardDriveSize";
+    public static final String CONFIG_MAX_FLASH_MEMORY_SIZE = "config.oc2.maxFlashMemorySize";
+
+    ///////////////////////////////////////////////////////////////////
+
     public static final String COMPUTER_SCREEN_CAPTURE_INPUT_CAPTION = "gui.oc2.computer.capture_input.capt";
     public static final String COMPUTER_SCREEN_CAPTURE_INPUT_DESCRIPTION = "gui.oc2.computer.capture_input.desc";
     public static final String COMPUTER_SCREEN_POWER_CAPTION = "gui.oc2.computer.power.capt";
diff --git a/src/main/java/li/cil/oc2/common/OpenComputers.java b/src/main/java/li/cil/oc2/common/OpenComputers.java
index 2b77d72c..fc15918c 100644
--- a/src/main/java/li/cil/oc2/common/OpenComputers.java
+++ b/src/main/java/li/cil/oc2/common/OpenComputers.java
@@ -3,7 +3,6 @@ package li.cil.oc2.common;
 import li.cil.ceres.Ceres;
 import li.cil.oc2.api.API;
 import li.cil.oc2.client.ClientSetup;
-import li.cil.oc2.common.CommonSetup;
 import li.cil.oc2.common.block.Blocks;
 import li.cil.oc2.common.bus.device.DeviceTypes;
 import li.cil.oc2.common.bus.device.data.BaseBlockDevices;
@@ -19,6 +18,16 @@ import net.minecraftforge.fml.javafmlmod.FMLJavaModLoadingContext;
 @Mod(API.MOD_ID)
 public final class OpenComputers {
     public OpenComputers() {
+        // Do class lookup in a separate thread to avoid blocking for too long.
+        // Specifically, this is to run detection of annotated types via the Reflections
+        // library in the serialization library and the device tree registry.
+        new Thread(() -> {
+            Ceres.initialize();
+            DeviceTreeRegistry.initialize();
+        }).start();
+
+        Config.initialize();
+
         Items.initialize();
         Blocks.initialize();
         TileEntities.initialize();
@@ -30,13 +39,5 @@ public final class OpenComputers {
 
         FMLJavaModLoadingContext.get().getModEventBus().addListener(CommonSetup::run);
         FMLJavaModLoadingContext.get().getModEventBus().addListener(ClientSetup::run);
-
-        // Do class lookup in a separate thread to avoid blocking for too long.
-        // Specifically, this is to run detection of annotated types via the Reflections
-        // library in the serialization library and the device tree registry.
-        new Thread(() -> {
-            Ceres.initialize();
-            DeviceTreeRegistry.initialize();
-        }).start();
     }
 }
diff --git a/src/main/java/li/cil/oc2/common/vm/Allocator.java b/src/main/java/li/cil/oc2/common/vm/Allocator.java
index 72101ffd..a024b39a 100644
--- a/src/main/java/li/cil/oc2/common/vm/Allocator.java
+++ b/src/main/java/li/cil/oc2/common/vm/Allocator.java
@@ -94,7 +94,7 @@ public final class Allocator {
         if (size < 0) {
             throw new IllegalArgumentException();
         }
-        return Config.maxAllocatedData - size >= allocated;
+        return Config.maxAllocatedMemory - size >= allocated;
     }
 
     private static final class Allocation {