Asm Craft

Assembled programs execute on a virtual machine that the mod provides, so code written for it runs in the game world rather than on the host system. The author describes the machine as using a framework that differs from the usual setup. A C++ compiler for the language is still being worked on, and the author says it aims to be as complete as possible.

The virtual machine has seven registers. The first four pass variables when calling a function, one holds the pointer to the current execution address, one stores a function's return value, and the last holds the result of a condition check, which has only two states. It has two memories: one for the application's commands at 1024 bytes, and another for runtime data. The machine supports only 22 commands, listed in a table in the author text.

Support for Minecraft Assembly Language is presented as present in the mod. The author notes that Chinese-language users may need a translator, since the mod does not yet support that language well. Asm Craft is client and server, so the server and every player need it. Fabric is the only loader, with files for 1.21.4 only, and the code is open source under the MIT License.