Editing Atari ST (section)

=== ST hardware ===
The lead architect of the new computer project at Tramel Technology and Atari Corporation was ex-Commodore employee [[Shiraz Shivji]], who previously worked on the [[Commodore 64]]'s development.<ref>{{cite book|url=https://books.google.com/books?id=QZS_gXpshd4C&pg=PT230|title=Classic Videogame Hardware Genius Guide|publisher=[[Imagine Publishing]]|page=230|isbn=9781908222220|via=Google Books}}</ref><ref>{{cite magazine |magazine=[[InfoWorld]] |volume=11 |issue=42 |url=https://books.google.com/books?id=nDAEAAAAMBAJ&pg=PA44 |title=Elahian Looks for Funding for Firm Devoted to Building Small Laptop PCs |date=October 16, 1989 |page=44}}</ref> Different CPUs were investigated, including the 32-bit [[National Semiconductor]] [[NS32000]], but engineers were disappointed with its performance,{{r|3years}}{{r|chin19850128}} and they moved to the [[Motorola 68000]]. The Atari ST design was completed in five months in 1984, concluding with it being shown at the January 1985 Consumer Electronics Show.<ref name="3years"/>

A custom sound processor called [[Atari AMY|AMY]] had been in development at Atari, Inc. and was considered for the new ST computer design. The chip needed more time to complete, so AMY was dropped in favor of a commodity Yamaha YM2149F variant of the [[General Instrument AY-3-8910]].<ref>{{cite magazine |magazine=Practical Computing |date= 1985 |page=48 |title=Atari 520ST}}</ref>