v2026.04.02/emulators/beetle_lynx.yml

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emulator: Beetle Lynx (Mednafen Lynx)
type: libretro
source: "https://github.com/libretro/beetle-lynx-libretro"
profiled_date: "2026-03-18"
core_version: "v1.24.0"
display_name: "Atari - Lynx (Beetle Lynx)"
cores: [mednafen_lynx]
systems: [atari-lynx]
verification: existence
notes: >
Fork of Mednafen's Handy module for Atari Lynx emulation via libretro.
The core loads lynxboot.img from the system directory at game load time
(libretro.cpp:191). CRom constructor in rom.cpp reads exactly 512 bytes
from the file. If the file is missing or undersized, the ROM array is
filled with 0x88 (DEFAULT_ROM_CONTENTS) and the core continues without
error, but games will not boot correctly without the real boot ROM.
The cart database in cart.cpp identifies the BIOS by CRC32 0x0d973c9d
("[BIOS] Atari Lynx (USA, Europe)", size 512).
No hash validation is performed on the BIOS at load time.
Core options: lynx_rot_screen (screen rotation), lynx_pix_format
(pixel format), lynx_force_60hz (force 60Hz refresh).
ROM extensions: .lnx, .lyx, .bll, .o
files:
- name: "lynxboot.img"
description: "Atari Lynx Boot ROM"
region: "World"
required: true
size: 512
sha1: "e4ed47fae31693e016b081c6bda48da5b70d7ccb"
md5: "fcd403db69f54290b51035d82f835e7b"
crc32: "0d973c9d"
source_ref: "libretro.cpp:191, rom.cpp:50-78, cart.cpp:67"
notes: "512-byte boot ROM. Core silently degrades without it but games will not run."