Copperline vs FS-UAE

Copperline is a free, open-source Amiga emulator for games, demos, and development, available on Linux, macOS, Windows, and in browsers. It models OCS, ECS, and AGA machines with 68000 through 68060 CPUs, plus expansion boards, hard disks, and CD drives. Its Debug workspace puts registers, disassembly, and memory beside the Amiga display, and supports reverse stepping from snapshots. Development features include scripted inputs and captures, repeatable test sessions, headless runs, a JSON-RPC control protocol, and debugging Amiga source code from Visual Studio Code. Rollback netplay supports two players on desktop or in browsers, up to four desktop players with the four-player adapter, and up to eight spectators. A libretro core supports RetroArch, including A500, A1200, and CD32 software, WHDLoad, playlists, save states, four local controller ports, and RetroArch netplay. Copperline includes the AROS Kickstart replacement, though some software needs an original Kickstart ROM. It does not support high-density Amiga floppy images or sector-based PC/CrossDOS images.

FS-UAE is a free Amiga emulator for Linux, macOS, and Windows, with an emphasis on games and support for high-end Amiga systems. It emulates systems including the Amiga 500, 500+, 600, 1000, 1200, 4000, CD32, and CDTV. It accepts floppy images such as ADF and IPF, CD-ROM images such as ISO and BIN/CUE, and computer folders mounted as Amiga hard drives. Its optional graphical Launcher configures the emulator without configuration files and can identify games through the Open Amiga Game Database, retrieving covers and screenshots. The Launcher can also recognize many archived WHDLoad games. An on-screen menu supports gamepad control for tasks such as changing disks and loading save states. FS-UAE supports cross-platform online play and offers graphics options including aspect correction, zoom, shaders, and visual themes. It is free software under GPLv2, with some project parts and dependencies under other open-source licenses. It requires a moderately fast computer with accelerated OpenGL graphics; a gamepad or joystick is recommended, and users should ideally have the Kickstart ROMs for the systems they want to emulate.