In the mid-90s Nintendo of America eased up on its stringent policies on blood and violence. After Sega created the Mega CD (Sega CD in North America) add on for its 16-bit machine, Nintendo initially contracted with Sony to develop an add-on CD-ROM drive for the SNES, but afraid that Sony would get all the profit from the CD-ROM media, and also surprised at the failure of Sega's Mega CD, Nintendo terminated the contract and went with Philips. Nintendo announced their alliance with Philips at the same conference that Sony announced their CD-ROM drive. Nothing happened about the add-on drive in regard to the SNES, but Sony took the time and research and began to spin it off into a new product, the PlayStation. Philips took a similar route and developed the far less successful CD-i. Since Philips had already gained license to create games using Nintendo's exclusive characters, games from series such as Mario and The Legend of Zelda appeared on the CD-i, though most fans discard them from being part of the series due to their entirely third-party development and poor quality. The deal between Philips and Nintendo eventually fell through, and the CD-i was seen as another ill-fated attempt by Philips to enter the computer market.
----引自Wikipedia (http://en.wikipedia.org/wiki/History_of_Nintendo)

任天堂当时害怕SONY把所有CD-ROM业务的利益都收入囊中,所以毅然终止了合作,并转与Philips展开新的合作.应该说,任与索的合作的破裂主要是由于利益分配不均