The official release of Minecraft Java Edition 1.19.1 arrived on July 27, 2022 , introducing a mix of helpful mob mechanics and controversial social features. While technically a minor update to "The Wild Update," it brought significant changes to how players interact with both friendly mobs and each other. The Star of the Show: Allay Duplication
: Reports are reviewed by human moderators at Mojang Studios, who can issue temporary or permanent bans from online play and Realms.
: The chat scrollbar was moved to the right of the window for better visibility.
One of the most exciting additions is the ability to duplicate the , the helpful blue mob that collects items for you.
: Dedicated servers can now enforce a secure profile, requiring all players to have a cryptographically signed public key. Technical Changes and Bug Fixes
: If an Allay is near a playing jukebox, it will begin to dance. Handing it an Amethyst Shard while it dances will cause it to "duplicate," creating a second Allay .
This LMC simulator is based on the Little Man Computer (LMC) model of a computer, created by Dr. Stuart Madnick in 1965. LMC is generally used for educational purposes as it models a simple Von Neumann architecture computer which has all of the basic features of a modern computer. It is programmed using assembly code. You can find out more about this model on this wikipedia page.
You can read more about this LMC simulator on 101Computing.net.
Note that in the following table “xx” refers to a memory address (aka mailbox) in the RAM. The online LMC simulator has 100 different mailboxes in the RAM ranging from 00 to 99.
| Mnemonic | Name | Description | Op Code |
| INP | INPUT | Retrieve user input and stores it in the accumulator. | 901 |
| OUT | OUTPUT | Output the value stored in the accumulator. | 902 |
| LDA | LOAD | Load the Accumulator with the contents of the memory address given. | 5xx |
| STA | STORE | Store the value in the Accumulator in the memory address given. | 3xx |
| ADD | ADD | Add the contents of the memory address to the Accumulator | 1xx |
| SUB | SUBTRACT | Subtract the contents of the memory address from the Accumulator | 2xx |
| BRP | BRANCH IF POSITIVE | Branch/Jump to the address given if the Accumulator is zero or positive. | 8xx |
| BRZ | BRANCH IF ZERO | Branch/Jump to the address given if the Accumulator is zero. | 7xx |
| BRA | BRANCH ALWAYS | Branch/Jump to the address given. | 6xx |
| HLT | HALT | Stop the code | 000 |
| DAT | DATA LOCATION | Used to associate a label to a free memory address. An optional value can also be used to be stored at the memory address. |