GameBuilder BASIC (GB BASIC) is a retro Fantasy Console that generates ROMs compatible with the popular handheld game console. It has everything ready-to-use for writting code, making assets, compiling projects, running with the built-in emulator, exporting to runnable ROM, etc.

Why GB BASIC?

GB BASIC is programmable in a brand new BASIC dialect. The integrated assets editors are intuitive to use. You can generate real ROMs and play on any GB emulator or hardware.

GB BASIC compiles fast
GB BASIC generates ROMs for various mappers, devices and emulators

Features

Programmable in BASIC, an easy to learn and fun to use programming language
Easy to use API for graphics, input, audio, and other facilities
Built-in libraries for scene, actor, controllers, GUI
Built-in libraries for collision detection, persistence, RTC, etc.
Extension feature including mouse & touch, shell command, debugging, etc.
Handy tools for editing tiles, map, scene, actor, font, sound, etc.
Project can be exported into real ROM
Dozens of example projects

Specs

CPU: 4.19MHz/8.38MHz for classic/colored respectively
Threads: up to 16 concurrent execution contexts
Display: 160x144px
Code: BASIC, supports multiple source pages
Gamepad: 8 buttons (D-Pad + A/B + Select/Start)
Mouse and touch: supported by extension
Tiles: up to 256 units per page
Map: up to 255 tiles in one dimension per page; two layers (graphics, attributes)
Sprite: supports 8x8 and 8x16 sprites
Scene: up to 255 tiles in one dimension per page; four layers (map, attributes, properties, actors)
Actor: up to 8x8 tiles per frame; up to 256 frames per page
Font: supports TrueType (.ttf) and bitmap-based (.png .jpg .bmp .tga); up to 16px; 1bpp or 2bpp
Audio: 4 channels; supports importing from JSON, VGM, WAV, FxHammer
Palette: 2bit (4 colors) per tile, palette of map and actor is configurable for colored device
GUI: supports label, progress bar, menu, etc.
Persistence: supported
RTC: supported
Serial port: supported