Editing IBM AS/400 (section)

=== Silverlake ===
During the Fort Knox project, a [[skunkworks project]] was started at [[IBM Rochester]] by engineers who believed that Fort Knox's failure was inevitable. These engineers developed code that allowed System/36 applications to run on top of the System/38,<ref name="schleicher-interview" /> and when Fort Knox was cancelled, this skunkworks project evolved into an official project to replace both the System/36 and System/38 with a single new hardware platform.{{sfnp|Soltis|2001|p={{pn|date=October 2023}}}} The project became known as ''Silverlake'' (named for [[Silver Lake (Rochester, Minnesota)|Silver Lake in Rochester, Minnesota]]) and officially began in December 1985.<ref>{{cite web|website=helpsystems.com |url=https://www.helpsystems.com/blog/happy-30th-anniversary-ibm-i|title=Happy 30th Anniversary, IBM i! |author=Tom Huntington|date=2018-06-21 |access-date=2021-03-05|archive-date=2021-04-20 |archive-url=https://web.archive.org/web/20210420033243/https://www.helpsystems.com/blog/happy-30th-anniversary-ibm-i|url-status=dead}}</ref> The Silverlake hardware was essentially an evolution of the System/38 that reused some of the technology developed for the Fort Knox project.<ref name="schleicher-interview"/><ref>{{cite web|url=https://wiki.midrange.com/index.php/Silverlake |title=Silverlake |website=wiki.midrange.com |date=2006-08-21|access-date=2021-03-06}}</ref>

Silverlake's goal was to deliver a replacement for the System/36 and System/38 in as short a timeframe as possible, as the Fort Knox project had stalled new product development at Rochester, leaving IBM without a competitive midrange system.<ref name="brave-new-world">{{cite web |url=https://www.postbulletin.com/the-brave-new-world-of-ibm-rochester-by-eric-j/article_dca93382-06b2-5f8a-8c4a-a42b58334432.html|title=The brave new world of IBM Rochester |author=Eric J. Wieffering |date=1992-05-23|website=postbulletin.com|access-date=2021-03-06}}</ref> On its launch in 1986, the System/370-compatible [[IBM 9370]] was positioned as IBM's preferred midrange platform, but failed to achieve the commercial success IBM hoped it would have.{{sfnp|Soltis|1997|p={{pn|date=March 2022}}}}<ref>{{cite news |url=https://www.chicagotribune.com/news/ct-xpm-1988-06-20-8801090224-story.html|title=NEW IBM MIDRANGE TO DEBUT |author=Christine Winter |date=1988-06-20|newspaper=[[Chicago Tribune]]}}</ref> Much like Silverlake, the 9370 also reused the co-processor developed during the Fort Knox project as its main processor and the same SPD I/O bus that was derived from the [[Series/1]] bus.{{sfnp|Soltis|1997|p={{pn|date=March 2022}}}}