emulator: DoubleCherryGB
type: libretro
source: "https://github.com/TimOelrichs/doublecherryGB-libretro"
profiled_date: "2026-03-18"
core_version: "v0.17.0"
display_name: "Nintendo - Game Boy / Color (DoubleCherryGB)"
cores:
  - DoubleCherryGB
systems:
  - nintendo-gb
  - nintendo-gbc

notes: |
  DoubleCherryGB is a Game Boy / Game Boy Color emulator forked from TGB Dual
  by GIGO and Hii. It adds multi-Game Boy emulation with virtual link cable
  support for up to 16 players, DMG-07 4-Player Adapter emulation, and
  built-in Pokemon distribution events.

  No BIOS or boot ROM files are required or supported. The core does not
  call RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY for firmware loading and does
  not attempt to open any files from the system directory.

  In cpu.cpp:82, the program counter is initialized to 0x100 (post-boot ROM
  entry point), and cpu::reset() sets all registers to their post-boot
  values directly (AF=0x01B0 for DMG, 0x11B0 for CGB). This means the
  core completely bypasses the boot ROM sequence via HLE register setup.

  The .info file at libretro-core-info confirms no firmware entries.

  Supported extensions: gb, dmg, gbc, cgb, sgb.
  Library version: v0.18.0.

files: []