Category: Mappers with scanline IRQs
Mappers in this category have the ability to schedule an IRQ an arbitrary and continuously-adjustable number of scanlines in the future. This is triggered in response to a rendering signal such as PPU A12.
Mappers with configurable cycle-based IRQs can simulate a scanline-counter by waiting an equivalent number of CPU cycles, but have less robust horizontal timing, since they will fire relative to their start time, rather than relative to a rendering signal. The VRC IRQ has a convenient mode for this.
Mappers with a fixed delay (but still clocked by the PPU) should go in the fixed-timing category instead.
Subcategories
Pages in this category
98 pages
- INES Mapper 014
- INES Mapper 017
- INES Mapper 037
- INES Mapper 045
- INES Mapper 047
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- INES Mapper 074
- INES Mapper 100
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- J.Y. Company ASIC
- MMC3
- MMC5
- MMC6
- NES 2.0 Mapper 260
- NES 2.0 Mapper 268
- NES 2.0 Mapper 281
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- NES 2.0 Mapper 441
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- NES 2.0 Mapper 451
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- NES 2.0 Mapper 467
- NES 2.0 Mapper 523
- NES 2.0 Mapper 534
- NES 2.0 Mapper 540
- NES 2.0 Mapper 594
- NES 2.0 Mapper 682
- RAMBO-1
- TKSROM
- TLSROM