A security researcher has demonstrated a software-only partial jailbreak of the Switch 2, gaining "userland" access that he says "lets us run homebrew, reverse engineer and mod Switch 2 games, back up save files off the Switch, and access most of the Switch 2’s peripherals through MMIO."

The hack relies on the original Switch version of SmileBasic 4, the latest in a long-running series of programming environments and interpreters that run on Nintendo hardware. The so-called "tethered" hack also requires access to a macOS or Linux PC on the same network to run a node.js package that helps enable privileged system access.

Researcher Sammy Hajhamid writes that he used OpenAI's Codex to poke at SmileBasic's language interpreter, using a custom harness that could send USB commands to the system and view results via HDMI (as well as power cycling via a Bluetooth light switch flipping device). After "substantial effort for ~2 weeks," that harness discovered a 32-bit integer overflow that occurs when removing items from an array in SmileBasic. That error gives access to an array pointer, which in turn allows read-and-write access to portions of system memory.

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Last year, we reported on Red Viper, a Virtual Boy emulator that added a splash of Super Game Boy-style color to Nintendo's famously failed red-on-black "portable" 3D headset from the '90s. Now, a new emulation experiment, VBoy Color, has taken the concept to a higher level, using a tile-based palette system that allows for many more distinct colors in each individual Virtual Boy frame.

Rather than simply replacing the Virtual Boy's four shades of red with four different colors, VBoy Color's readme files explain how the emulator's game-specific Color Packs can assign a distinct four-color palette to each 8x8 tile in a Virtual Boy scene. That means the emulator can differentiate between green pipes, grey platforms, and red brick wall in Mario Clash, for instance, even though all those in-game objects share the same overlapping red hues in the original game.

The Game Boy Color-esque results feel like being transported into an alternate history where Nintendo invested in a full-color display rather than cheaper red LEDs for the Virtual Boy hardware. The increased contrast between differently colored elements is particularly welcome in games like Jack Bros. or Vertical Force, where the original red-on-red display often makes it hard to differentiate the player-character from busy red background elements.

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