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Legacy Connector

Run unmodified legacy mods from b1.7.3, 1.4.7, 1.5.2, 1.6.4, 1.7.10, 1.12.2, and 1.20.1 directly on NeoForge 1.21.1.
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Legacy Connector 0.1.1

File namelegacyconnector-0.1.1.jar
Uploader
KyleBeepKyleBeep
Uploaded
Oct 24, 2026
Downloads
23
Size
15.1 MB
Mod Loaders
NeoForge
File ID
9314757
Type
A
Alpha
Supported game versions
  • 1.21.1

Curse Maven Snippet

NeoForge

implementation "curse.maven:legacy-connector-1763521:9314757"

Learn more about Curse Maven

What's new

Prerelease. Highlights since 0.1.0:

Fixed

  • World save / exit hang: a legacy tile entity reading its neighbours while its chunk unloaded deadlocked the server thread (#47). Reads of unloaded chunks now return air like 1.7.10.
  • A stopped dedicated server now exits instead of hanging on legacy mods' non-daemon thread pools (IC2 and others).
  • Legacy exceptions in block neighbour-change and tick callbacks are logged instead of crashing the server (a HBM landmine plus AE2 tiny TNT crash).
  • Mob sounds: 1.7.10 vanilla sound names (mob.cow.say, mob.zombie.hurt, ...) are translated to the modern entity sound events (#49).

New

  • Galacticraft addons: per-planet gravity, fall damage and silent space from the dimension provider (#42, #43); Galacticraft's dependency downloader is skipped so its coremod hooks register.
  • Legacy chest loot (ChestGenHooks) is added to the vanilla chest loot tables (#46).
  • /legacyconnector dim list shows dimension names (#40).
  • HUD: RenderTickEvent is posted around the HUD pass, icons.png composed from the modern HUD sprites (#41, partial).
  • Many more legacy API classes: config screens (GuiConfig, ConfigElement, DummyConfigElement), ISpecialArmor, CrashReport/ReportedException, BossStatus, SlotFurnace, ContainerChest, vanilla block/item/mob classes mods extend (fence, wall, colored block, slab/bucket items, zombie, skeleton, spider, creeper, slime, pig, horse, TNT, falling block, lightning), packets (game state, block change, experience, effect, respawn), ForgeEventFactory, PlayerDropsEvent, PlayerDestroyItemEvent, RenderLivingEvent, PlaySoundEvent17, TextureUtil, ClientCommandHandler, Timer, WorldGenLakes, dispenser projectiles, red-dust particles.

Known issues: high memory use with very large packs (#48), boss bars only near the boss (#50), mod-dimension void at a Y level (#51), ore host-rock textures (#44). Most client-side fixes in this release are untested on a client.

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