Java Edition 13w01a

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13w01a Banner.png

Java Edition



Release date

January 3, 2013[1]

Snapshot for



Client (.json)
Server (.exe)

Protocol version


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



Block of redstone
  • Stores redstone dust similar to blocks of diamond, etc.
  • Emits constant redstone power.
  • Works as a pushable redstone power source.
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.
Nether quartz ore
  • New ore exclusive to the Nether.
  • Drops 1 nether quartz item when mined.
  • Generates around netherrack.
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 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.
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.


Nether quartz



Locked chests
  • Texture for the block was changed.
  • Are more stable from previous versions.
Redstone circuits
  • Are now more consistent.


  • Now shows the item name in-game.


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.


2 bugs fixed

From released versions before 1.5

  • MC-177 – Clocked piston arm turns invisible when exiting game/dying/etc.
  • MC-184 – (Powered) redstone doesn't update right.