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The YM2413, a.k.a. OPLL, is an FM synthesis sound chip manufactured by Yamaha Corporation. It is related to Yamaha's OPL family of FM synthesis chips, and is a cost-reduced version of the YM3812 (OPL2).
The YM2413 was used in the FM Sound Unit expansion for the Sega Mark III and the Japanese model Sega Master System, as well as the MSX-MUSIC standard, which was released both as separate enhancement cards (such as the Panasonic FM-PAC) and built-in into several MSX2+ and the MSX TurboR computers.
Yamaha YM2413 (a.k.a. OPLL) 1986 18 9 2 Japanese Master System, Sega Mark III, MSX (in MSX Music cartridges like the FM-PAC, and internally in several Japanese models by Panasonic, Sony and Sanyo), Yamaha Portasound digital keyboards (PSS-140, PSS-170, PSS-270) Silicon-gate NMOS LSI chip [68] [33] [62] YM2604 (OPS2) / YM3609 (EGM) 1986 96 16 6
The VRC7 is an advanced MMC chip from Konami, supporting bank switching and IRQ counting equivalent to the VRC6, as well as containing a YM2413 derivative providing 6 channels of 2-op FM synthesis. The advanced audio hardware is used only in the Famicom game Lagrange Point .
The Yamaha YM2151, also known as OPM (FM Operator Type-M) is an eight-channel, four-operator sound chip developed by Yamaha.It was Yamaha's first single-chip FM synthesis implementation, being created originally for some of the Yamaha DX series of keyboards (DX21, DX27, and DX100 [1]).
The YM2612, a.k.a. OPN2, is a sound chip developed by Yamaha.It is a member of Yamaha's OPN family of FM synthesis chips, and is derived from the YM2203. [1]The YM2612 is a six-channel FM synthesizer used in several game and computer systems, most notably in Sega's Mega Drive/Genesis video game console [2] as well as Fujitsu's FM Towns computer series. [3]
For ROM wave data access, the Yamaha YRW801 2MB ROM chip can be connected to the OPL4. It holds approximately 330 samples, mostly 22.05-kHz 12-bit samples with some drums at 44.1 kHz.
The YM2608, a.k.a. OPNA, is a sound chip developed by Yamaha.It is a member of Yamaha's OPN family of FM synthesis chips, and is the successor to the YM2203.It was notably used in NEC's PC-8801/PC-9801 series computers.