Editing UAE (emulator) (section)

==Emulation speed==
There have been many threads in the past on [[Usenet]] and other public forums where people argued about the possibility of writing an Amiga emulator. Some considered UAE to be attempting the impossible; to be demanding that a system read, process and output 100 MB/s of data when the fastest PC was a 66&nbsp;MHz [[Intel 80486|486]], while keeping various emulated chips (the Amiga [[chipset]]) all in sync and appearing as they were supposed to appear to software.

UAE was almost entirely unusable in its first releases, but slowly and step by step, it fleshed out its support of the Amiga chipset and by the end of 1997 was able to emulate an [[Amiga 500]] at a quality and speed that were sufficient for productivity use and for many games.

Since then, UAE has been usable, thanks partly to the effort taken to develop it and partly to the big improvements in technology that brought computers many times faster than those UAE was initially running on. Many [[Amiga games]] and applications can run smoothly on a [[Pentium II]]-era system. The realization that a useful Amiga emulator could be written contributed to an increase in enthusiasm about emulation, which started or sped-up efforts to write emulators for other and often less popular computer and electronic game architectures{{Citation needed|date=July 2018}}.

A major improvement was made in 2000 by Bernd Meyer with the use of [[Just-in-time compilation]],<ref name="amigahistory" /> which significantly improved the emulation speed, to the extent that average PCs could now emulate some [[Amiga software]] faster than any real Amiga could run it. UAE can use as much of the host's power in [[native mode]] as possible, or balance it with other requirements of the host OS, or to accurately reflect the original speed, depending on a user's choice. UAE also provides an [[ReTargetable Graphics|RTG]]-compatible "[[video card]]" for the Amiga side of the emulation which is tailored for display on the host hardware, so as not to be limited to the emulation of the original Amiga video hardware.