Talk:Yamaha YM2413

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I moved this comment from the end of the article to the talkpage. Sietse 13:51, 8 Apr 2005 (UTC)

//The above fact about the Famicom game Langrange Point is not correct. That game uses a chip known as the VRC7, which (I believe) was developed by Konami in-house and used in other Famicom games, such as Castlevania III (Japanese Famicom version only). It is NOT the YM2413. The VRC7 and the YM2413 both use FM synthesis, and both sound very similar, however, that's where the similarities end. If someone wants to edit the page, and make the correction I've mentioned, it would be appreciated. Otherwise leave this message here. (VRC7 needs its own page by the way, as it has a cult following.)\\ - EchoMorphsapient

  • It has been updated. By the way, the chip's proper name is "VRCVII" as this is what is actually marked on the IC on the cartridge. Look at the chip at the top of this photo: [1]. Also, a technical document on the VRCVII is available here: [2]. Thanks go to Kevin Horton for both the document and the photo. Firebug 06:02, 27 Apr 2005 (UTC)
  • So, what is then the actual difference between the FM parts in the VRC-VII and the 2413? From what little other information is available on the net, they seem pretty much identical. Not to mention that with Yamaha holding the patent on FM at the time, Konami pretty much would have no other source. I suspect they simply licensed an IP core that was available and integrated it into their mapper chip, and that the VRC-VII FM parts for all intents and purposes is a 2413. -- magetoo 17:00, 17 May 2006 (UTC)
    • Compare [3] (vrcvii) to [4] (ym2413). They have the same register map, the same parameters, and even the same built-in instruments. The ym2413 document is more complete, but it's obviously the same chip. Thus, the "very similar, but not identical" comment could probably be cut.