David Polt

Just finished a Minecraft library for creating blocks server side. The players dont have to download anything. The plugin only has to be installed on the server. I also made a conveyor block for testing the plugin. If the player or any entity stands on it they get moved in the corresponding direction. The conveyor block is a directional block meaning it can be placed in any direction the player is looking at. It works by placing an invisible block for the hitbox and then spawing a display entity at the location. For the player it looks like a completely new block but in reality its just a display entity.

Even more bugs in the Main decoder. I finally managed to fix all of them and even wrote some tests to make sure no more are in the decoder. I never want to touch this file ever again. There are so many 0s and 1s and if only one of them is off the whole instruction doesnt work. The datapath is mostly done and hopefully doesnt require further changes. I also isolated most of the circuits so they are easier testable. The picture shows the new schematic of the datapath

I found some bugs in the MainDec module. Some bits were misaligned. I also managed to finish the ALU decoder which takes the current operation and tells the computer what arithmetic operation it should perform. The main decoder is similar to that but instead of controlling the ALU (arithmetic logic unit) it moves the data around the cpu. All of the wires parallel to each other are the control lines which will go into the datapath (the part that operates the pc, but needs signals to know what it should do).

Just noticed that there was a massive issue in the design of the jump instructions. They used to only work with positive relative jumps. Now the program can jump in both directions up and down. This was achieved by adding a sign extender. And logical shift left. It multiplies all of the addresses by 2

I optimized the controller to remove all of the unecessary subtractors and multipliers. I also managed to add the branching logic. It just uses the flags from the flag register and decides whether or not to jump. The project is written in verilog which is a programming language made for designing hardware. I luckly dont have to place all of the logic gates manually. The image shows that a lot of hardware was removed and some added.

I have worked on a new and versitile paper library for creating custom items. As a test i made the lava chicken from A Minecraft Movie. The texturepack also got added to the git repository.

Created a custom island system. When players join they get assigned to their own island. Once the player leaves the island is unloaded to save memory. All progress is saved. The current system only supports one island per player but can be expanded to handle multiple.

A Basic controller which will change the inputs of the datapath depending on the current instruction and state of the machine. It sill needs some further work because it has way to much unecessary hardware like a multiplier and a subtractor.