Game Boy Port of Snake in Assembly

2 days ago

Snake game is used as an example for learning Game Boy development.
Game structure includes three screens managed by a state machine: title, play, and game over.
Core systems include a ring buffer for snake body coordinates, an occupancy grid for collision detection, and dirty rendering.
Rendering uses background tiles instead of sprites to avoid sprite limits and simplify rendering.
Movement logic includes preventing reverse direction and handling tail chase edge case.
Random number generation uses a simple linear feedback shift register mixed with the DIV register.
VBlank-safe rendering ensures no screen tearing, using bulk writes with LCD off or dirty tile updates.
RAM usage is under 500 bytes, with largest allocations for occupancy grid and snake arrays.
Code demonstrates fundamental Game Boy techniques like state machines, polling input, and collision detection.

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