DIRECTORY / SANDBOXES / BEFUNGE-93.VM

BEFUNGE-93 2D VM

Chris Pressey's 1993 2D toroidal instruction pointer grid and stack-based esoteric VM.

← ALL SANDBOXES

BEFUNGE-93 2D VM

// PRELOADED ESOTERIC CARTRIDGES

CLOCK FREQUENCY (OPS/SEC) 120 Hz

STACK: [ empty ]

STDOUT:

CLICK CELL: Paint / Edit Instruction | 'p' / 'g': Self-Modifying Memory | TOROIDAL: 80×25 Wrapped Grid

📚

RESEARCH & LEARNING VAULT // Befunge-93 2D Self-Modifying Grid Virtual Machine

Toroidal 2D spatial instruction matrix, self-modifying 'p'/'g' memory, and esoteric computation.

ACADEMIC & ALGORITHMIC REFERENCE

// HISTORICAL ORIGINS

Invented by Chris Pressey in 1993 with the explicit goal of creating a language as difficult to compile as possible by introducing a 2-dimensional instruction pointer and self-modifying code.

// GOVERNING EQUATIONS

\text{IP}_{t+1} = (\text{IP}_t + \vec{v}) \bmod (80, 25), \quad \text{Memory}(y, x) \leftarrow v \; \text{via} \; 'p'

// BROWSER IMPLEMENTATION

An 80x25 toroidal grid where the instruction pointer navigates four cardinal directions, pushing and popping from a LIFO stack, while using 'g' (get) and 'p' (put) to dynamically rewrite its own byte grid during execution.

// GUIDED EXPERIMENTS TO TRY IN THIS SANDBOX

1Self-Replicating Quine

🎯 Action:Select '02. Quine' and press '▶ RUN' at 300 Hz.

✨ Observe:Watch the instruction pointer read its own grid coordinates using 'g' and echo its exact source code into the STDOUT tape.

// CURATED PAPERS, RFCS & RESOURCES

Befunge-93 Language Specificationpaper

By Chris Pressey (Cat's Eye Technologies, 1993)

Original specification and instruction set architecture for the 2D Befunge virtual machine.