page_title: Memory management controller
section_title: VRC7
hierarchical_section_title: Memory management controller / Third-party chips / VRC7
caption_attribution_description: This is the VRC7 portion of the Lagrange Point PCB. In clockwise order: 1) The OPLL post-processor (as the YM2413's (and derrivatives) output is raw), 2) The VRC7, and 3) The SRAM battery, which is there for no reason whatsoever as it only has relevance to SRAM. This image was scanned by myself, and I upload it without a license for all to use.
context_page_description: Multi-memory controllers or memory management controllers are different kinds of special chips designed by various video game developers for use in Nintendo Entertainment System cartridges. These chips extend the capabilities of the original console and make it possible to create NES games with features the original console cannot offer alone. The basic NES hardware supports only 40k of ROM total, up to 32k PRG and 8k CHR, thus only a single tile and sprite table are possible. This limit was rapidly reached within the Famicom's first two years on the market and game developers began requesting a way to expand the console's capabilities.
  These chips are also known as mappers.
context_section_description: Manufacturer: Konami, Yamaha
  Games: Lagrange Point, Tiny Toon Adventures 2: Trouble in Wackyland
  The VRC7 is an advanced MMC chip from Konami, supporting bank switching and IRQ counting equivalent to the VRC6, and containing a YM2413 derivative providing 6 channels of FM Synthesis audio. This advanced audio is used only in the Famicom game Lagrange Point; while the Japanese version of Tiny Toon Adventures 2 also uses the VRC7, it does not make use of the extended audio.
caption: The VRC7 with a post-processor for the FM synthesis
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