Editing Sophie Wilson (section)

=== ARM processor ===
In October 1983, Wilson began designing the instruction set for one of the first [[reduced instruction set computer]] (RISC) processors, the [[ARM architecture|Acorn RISC Machine]] (ARM).{{sfn|Gelenbe|2009|p=121}} The ARM1 was delivered on 26 April 1985 and worked first time,{{sfn|Hohl|Hinds|2014|pp=5–6}} entering into production the same year.<ref name="Selwyn 2024" /> This processor type was later to become one of the most successful [[Semiconductor intellectual property core|IP core]]s – a licensed [[central processing unit|CPU]] core – and by 2012 was being used in 95% of [[smartphone]]s.<ref name="reg" /> Wilson also designed Acorn Replay, the video architecture for Acorn machines. This included operating system extensions for video access, as well as the [[codec]]s, optimised to run high frame rate video on ARM CPUs from the ARM 2 onwards.<ref name="acornuser199207_replay">{{cite magazine | url=https://archive.org/details/AcornUser120-Jul92/page/n108/mode/1up | title=Action Replay | magazine=Acorn User | date=July 1992 | access-date=29 October 2021 | last1=Drage | first1=Chris | pages=107–109 }}</ref>

She was a non-executive director of the technology and games company Eidos plc, which bought and created [[Square Enix Europe#Eidos Interactive|Eidos Interactive]], for the years following its [[Initial public offering|flotation]] in 1990.<ref name="acornusr199308_eidos">{{ cite news | url=https://archive.org/details/AcornUser133-Aug93/page/n30/mode/1up | title=The cutting edge | work=Acorn User | date=August 1993 | access-date=29 October 2021 | last1=Burley | first1=Ian | pages=29–31 }}</ref> She was a consultant to [[Arm (company)|ARM Ltd]] when it was split off from Acorn in 1990.

[[File:ARM development.jpg|thumb|right|Wilson giving a public presentation on [[ARM architecture|ARM]] development in 2009]]
Since the demise of Acorn Computers, Wilson has made a small number of public appearances to talk about work done there.<ref>{{cite web | url = http://www.srcf.ucam.org/cucps/19981999/ | title = CU Computer Preservation Society 1998–1999 | access-date = 28 June 2011 | date = 29 August 2002 | publisher = Cambridge University Computer Preservation Society | quote = On 20th October 1998, Sophie Wilson spoke to an audience of 22 about ''Acorn from the BBC to the ARM''. | archive-date = 31 March 2012 | archive-url = https://web.archive.org/web/20120331073911/http://www.srcf.ucam.org/cucps/19981999/ | url-status = live }}</ref>