runs on the Sam440 line developed by ACube Systems, following an agreement Hyperion. It also runs on Pegasos II systems developed by Genesi/bPlan and AmigaOne systems developed by British Eyetech and A-eon Technologies. AmigaOS 4 can run system-friendly AmigaOS software written for original Commodore Amigas. AmigaOS 4 provides backward-compatibility to 68K software through tiered emulation. If the program is known to be OS-friendly (it does not attempt to access hardware directly), then a lightweight JIT emulator is used and calls are allowed directly to AmigaOS 4's API which remains largely compatible to AmigaOS 3.x. However, if the program is not known, or is known to access hardware directly, then it will be executed using E-UAE. AROS systems AROS is an open-source re-implementation of AmigaOS and is designed more for portability. The features of the first attempts replicated those found in the AmigaOS 3.1. It runs on many x86-based systems as native or hosted flavors. AROS also runs on some 68k-based Amigas and PowerPC systems. There are also sellers of 'AresOne' systems dedicated to run AROS only. Unlike many other Amiga-based solutions, AROS is Amiga binary compatible only on 68k-based systems. This version is recognized for its high degree of compatibility at the source-code level, allowing it to make concessions towards the legacy deficiencies of the OS it was based from. MorphOS systems MorphOS is a closed-source re-implementation of AmigaOS. It runs on PowerPC-based systems but can run system-friendly AmigaOS software written for the original Commodore Amigas. MorphOS runs on Efika, Pegasos I/II and PowerPC based Apple Mac G4 models, such as the Mac Mini, eMac, PowerMac, PowerBook, and iBook. References External links A history of the Amiga - Jeremy Reimer's discussion of the history behind the Amiga's creation and demise with Commodore. Famous Amiga Uses Amiga Amiga History of Silicon Valley