generalplus

Reverse engineering the Little Tikes Story Dream Machine (LTSDM) cartridge. Included are hardware inspections, custom circuitry, and several attempts to learn the data pattern. My goal is to allow any parent to convert any audiovisual narrative into a custom cartridge compatible with the LTSDM.

Segher Boessenkool's u'nSP disassembler and emulator

SLEIGH specification for u'nSP

Custom frame toolkit for the Photo Creator Mini Cam — extract, design, and flash your own photo frame overlays onto the camera's SPI NOR flash chip using an XGPro programmer.

An open source implementation of the GeneralPlus A1800 audio codec

Decompilation effort for the BeHero console

🟡 Custom retro gaming OS for the GPL32900B Game Stick 4K. Runs entirely from the SD card, nothing is written to the flash.

Emulator for the VTech MobiGo (2010), the GeneralPlus u'nSP learning handheld: drop a cartridge and play. Touch screen, keyboard and sound; every cartridge tried reaches its menus, several their games; the undocumented ADPCM36 sound format worked out from the cartridges. Bring your own dumps.

🎵 Encode and decode GeneralPlus A1800 audio codec frames in Rust with precise fixed-point, subband processing for efficient low-bitrate audio.