INES Mapper 098

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Revision as of 23:04, 25 October 2024 by Michel iwaniec (talk | contribs) (Changed to reflect intention to assign in-development mapper for gbdk-2020 to this mapper number)
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iNES Mapper 098 has been earmarked for an in-development mapper intended to make GBC -> NES ports easier with modest hardware manufacturing costs.

Exact hardware specs are yet-to-be-finalized. But key features include:

  • UNROM-style bankswitching with support for up to 4MB flash ROM, optionally self-flashable
  • 32kB of CHR-RAM, divided into 4kB pages
  • Optional support for up to 32kB of switchable PRG-RAM
  • 8x8 color attributes (8x1 achievable with raster tricks)
  • Cheap scanline IRQ partially driven by software
  • 4-screen layout using parts of CHR-RAM, or 2/1-screen layout using CIRAM
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