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SPECIFICTION
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Copperline

copperline.dev

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Spec score 7.5 #13 of 22 in Amiga Emulators

What it is

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.

Spec sheet

Purpose
Copperline is an open-source Amiga emulator for games, demos and development.Read 28 Sep 2026 · copperline.dev
Product
Copperline is an open-source Amiga emulator written in Rust for games, demos, and development.Read 29 Sep 2026 · copperline.dev
Integrations
Copperline provides a libretro core for RetroArch and documentation for debugging Amiga source code with Visual Studio Code.Read 29 Sep 2026 · copperline.dev
Support
Users can report issues or contribute fixes on GitHub and discuss configurations, demos, and Amiga hardware on Discord.Read 29 Sep 2026 · copperline.dev
License
Copperline is free software under GNU GPL v3 or later; its CPU core crate is MIT-licensed.Read 29 Sep 2026 · copperline.dev
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.Read 28 Sep 2026 · copperline.dev
Automation
Copperline supports scripted inputs and captures, headless runs, and a JSON-RPC control protocol for automation.Read 29 Sep 2026 · copperline.dev
Compatibility limits
High-density Amiga floppy images and sector-based PC/CrossDOS images are unsupported.Read 29 Sep 2026 · copperline.dev
Debugging
The Debug workspace provides register, disassembly, and memory inspectors, breakpoints, and reverse execution from snapshots.Read 29 Sep 2026 · copperline.dev
Development tools
Copperline supports scripted inputs and captures, repeatable test sessions, a JSON-RPC control protocol and debugging Amiga source code from VS Code.Read 28 Sep 2026 · copperline.dev
Hardware
It models OCS, ECS, and AGA Amiga machines with 68000 through 68060 CPUs.Read 29 Sep 2026 · copperline.dev
Hardware support
It models OCS, ECS and AGA Amiga machines with 68000 through 68060 CPUs, expansion boards, hard disks and CD drives.Read 28 Sep 2026 · copperline.dev
macOS signing
The macOS download is ad-hoc signed rather than notarized, so macOS may block its first launch.Read 29 Sep 2026 · copperline.dev
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.Read 29 Sep 2026 · copperline.dev
Platform requirement
The Linux AppImage requires a Vulkan driver.Read 29 Sep 2026 · copperline.dev
RetroArch
Its libretro core supports A500, A1200 and CD32 software, WHDLoad, playlists, save states, four local controller ports and RetroArch netplay.Read 28 Sep 2026 · copperline.dev
ROM requirement
Copperline includes the AROS open-source Kickstart replacement, though some software requires an original Kickstart ROM.Read 28 Sep 2026 · copperline.dev
ROM support
Copperline includes the AROS Kickstart replacement; some software requires an original Kickstart ROM.Read 29 Sep 2026 · copperline.dev
Security and signing
The macOS download is ad-hoc signed rather than notarized, so macOS may require approval on first launch.Read 28 Sep 2026 · copperline.dev

Strong points and limits

Strong points

  • Models OCS, ECS, and AGA hardware with 68000–68060 CPUs.
  • Debug workspace supports reverse stepping from snapshots.
  • Automation includes scripted inputs and JSON-RPC control.
  • Rollback netplay supports desktop and browser players.

Limits

  • Some software requires an original Kickstart ROM.
  • High-density Amiga floppy images are unsupported.
  • Linux AppImage requires a Vulkan driver.
  • macOS may require approval on first launch.

Who it suits

Copperline suits Amiga users who want to play games and demos, or developers who need debugging, automation, and repeatable test sessions. Its browser and desktop netplay options also serve players who want multiplayer sessions.

Verdict

Copperline combines Amiga emulation with development and debugging tools, plus rollback netplay. Check its disk-image limits, ROM needs, and platform-specific launch requirements before choosing it.

Where Specifiction places it

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