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13w01a is the first snapshot released for Java Edition 1.5, and the first snapshot released in 2013.

Additions[]

Blocks[]

Block of Redstone JE1 BE1 Block of redstone
  • Stores redstone dust similar to blocks of diamond, etc.
  • Emits constant redstone power.
  • Works as a pushable redstone power source.
Daylight Detector Daylight sensors
  • Output power while receiving sunlight.
  • The level varies depending on the time (more sunlight=more redstone power), and it does not function at night.
Hopper (D) JE1 Hoppers
Nether Quartz Ore JE1 BE1 Nether quartz ore
Redstone Comparator (S) JE1 Redstone comparator
  • Has 2 inputs and 1 output.
  • If A≥B, the output will be A, otherwise it will stay off – When the comparator is toggled, it will output full strength instead of A it will subtract B from A and need a comparator as input for B.
  • Replacement for the capacitor.
  • Whichever side gives the bigger signal will be considered signal B.
Trapped Chest Trapped chests
  • Gives out a signal depending on the amount of players looking inside. 1 person = 1 strength signal, 2 people = 2, etc.
  • Crafted with a chest and a tripwire hook.
  • Large trapped chests can be staggered with large chests to allow more compact storage.
  • Texture is slightly different than a normal chest, with a red stain around the latch.
Light Weighted Pressure Plate JE1 BE1 Heavy Weighted Pressure Plate JE1 BE1 Weighted pressure plates
  • Detects item stacks.
  • Gold version reaches full strength at 60 items.
  • Iron version reaches full strength at 600 items.
  • Linear, so 10 strength signal means twice as many items as a 5 strength signal.

Items[]

Nether Brick JE1 BE1 Nether Brick
Nether Quartz JE1 BE1 Nether quartz

Changes[]

Blocks[]

Locked chest JE4 Locked chests
  • Texture for the block was changed from Locked chest JE3
Pistons
  • Are more stable from previous versions.
    • Sticky pistons are less sticky.
Redstone circuits
  • Are now more consistent.

Items[]

General
  • Now shows the item name in-game.

Gameplay[]

Death messages
  • Now show the weapon someone was killed with.
Inventory management
  • Double-click items to fill the stack up as much as possible.
  • Drag item stacks around to divide them up over the dragged-over slots.
  • Drag item stacks around with the right mouse button to place one of that stack in each dragged-over slot, if that slot is not occupied already.
  • Shift double-click an item stack to move all other item stacks of that kind to that part of the inventory.
  • Press Q while the mouse is over an item in the inventory or a container to drop it.

Bugs[]

  • [MC-5711] Redstone torches attached to the side of a block do not pop off if the block supporting them is destroyed.
  • [MC-5721] Dragging to spread an item out in the creative inventory, then clicking on the inventory tab, and placing the 0 stack item down, the game will crash.
  • [MC-5728] Infinite loop caused by subtraction mode comparators causes the world to be unplayable.
  • Mineral duplication: you can exponentially dupe minerals by putting then in a crafting table with a block of their material, then double clicking on a mineral in the crafting table, works on the same principle as the method below.
  • Crafted item duplication: Any stackable crafted item can be duplicated by setting up its recipe in a crafting table, then double clicking an existing version of this item in the inventory. Requires at least one of that item to be present in the inventory.

Fixes[]

3 issues fixed
From released versions before 1.5
  • MC-177[12w26a] Clocked piston arm turns invisible when exiting game/dying/etc.
  • MC-184[Beta 1.2] (Powered) redstone doesn't update right.
  • MC-5621[Beta 1.7] Blocks like redstone dust, repeaters, doors, and levers don't drop when the underlying block is pushed by a piston.

Gallery[]

Trivia[]

  • Along with 18w01a, 13w01a was released on the earliest calendar year out of all snapshots, on January 3.
    • Until this point, the snapshot released on the earliest calendar year out of all snapshots was 12w01a on January 5.

References[]

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