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Copperline
What it is
Copperline is a free, open-source Amiga emulator for games, demos, and development. It models OCS, ECS, and AGA machines using processors from the 68000 through 68060, with support for expansion boards, hard disks, and CD drives. A Debug workspace shows registers, disassembly, and memory alongside the Amiga display, and can reverse-step through snapshots. Development features include scripted inputs and captures, repeatable test sessions, headless runs, JSON-RPC control, and debugging Amiga source code from Visual Studio Code. Rollback netplay accommodates two players on desktop or in browsers; a four-player adapter enables up to four desktop players, with up to eight spectators. The libretro core works with RetroArch and supports A500, A1200, and CD32 software, WHDLoad, playlists, save states, four local controller ports, and RetroArch netplay. Copperline runs on Linux, macOS, Windows, and in browsers. It includes the AROS Kickstart replacement, but some software requires an original Kickstart ROM. High-density Amiga floppy images and sector-based PC/CrossDOS images are not supported.
For and against
For
- Models OCS, ECS, and AGA Amiga machines
- Offers rollback netplay and spectator support
- Debug workspace includes reverse stepping
- Supports scripted inputs and JSON-RPC control
- Runs on desktop systems and in browsers
Against
- Some software requires an original Kickstart ROM
- High-density Amiga floppy images are unsupported
- Sector-based PC/CrossDOS images are unsupported
- macOS may require approval at first launch
The verdict
Copperline combines Amiga emulation with debugging, automation, and multiplayer options. Check its ROM requirements and disk-image limitations for the software you want to use.
Who it suits
Copperline suits people who want to run Amiga games or demos, or work on Amiga software and repeatable tests. RetroArch users can also use its libretro core for supported Amiga software.
On the record
- Automation
- Copperline supports scripted inputs and captures, headless runs, and a JSON-RPC control protocol for automation.copperline.dev · read 29 Sep 2026
- Compatibility limits
- High-density Amiga floppy images and sector-based PC/CrossDOS images are unsupported.copperline.dev · read 29 Sep 2026
- Debugging
- The Debug workspace provides register, disassembly, and memory inspectors, breakpoints, and reverse execution from snapshots.copperline.dev · read 29 Sep 2026
- Development tools
- Copperline supports scripted inputs and captures, repeatable test sessions, a JSON-RPC control protocol and debugging Amiga source code from VS Code.copperline.dev · read 28 Sep 2026
- Hardware
- It models OCS, ECS, and AGA Amiga machines with 68000 through 68060 CPUs.copperline.dev · read 29 Sep 2026
- Hardware support
- It models OCS, ECS and AGA Amiga machines with 68000 through 68060 CPUs, expansion boards, hard disks and CD drives.copperline.dev · read 28 Sep 2026
- Integrations
- Copperline provides a libretro core for RetroArch and documentation for debugging Amiga source code with Visual Studio Code.copperline.dev · read 29 Sep 2026
- License
- Copperline is free software under GNU GPL v3 or later; its CPU core crate is MIT-licensed.copperline.dev · read 29 Sep 2026
- macOS signing
- The macOS download is ad-hoc signed rather than notarized, so macOS may block its first launch.copperline.dev · read 29 Sep 2026
- Maker
- The site identifies Andrew Hutchings, known as LinuxJedi, as the maker and says he uses real Amigas as a reference for checking emulator behavior.copperline.dev · read 28 Sep 2026
- Netplay
- Rollback netplay supports two players on desktop or in browsers, and up to four desktop players with the four-player adapter, plus up to eight spectators.copperline.dev · read 29 Sep 2026
- Platform requirement
- The Linux AppImage requires a Vulkan driver.copperline.dev · read 29 Sep 2026
- Product
- Copperline is an open-source Amiga emulator written in Rust for games, demos, and development.copperline.dev · read 29 Sep 2026
- Purpose
- Copperline is an open-source Amiga emulator for games, demos and development.copperline.dev · read 28 Sep 2026
- RetroArch
- Its libretro core supports A500, A1200 and CD32 software, WHDLoad, playlists, save states, four local controller ports and RetroArch netplay.copperline.dev · read 28 Sep 2026
- ROM requirement
- Copperline includes the AROS open-source Kickstart replacement, though some software requires an original Kickstart ROM.copperline.dev · read 28 Sep 2026
- ROM support
- Copperline includes the AROS Kickstart replacement; some software requires an original Kickstart ROM.copperline.dev · read 29 Sep 2026
- Security and signing
- The macOS download is ad-hoc signed rather than notarized, so macOS may require approval on first launch.copperline.dev · read 28 Sep 2026
