NES 2.0 Mapper 417: Difference between revisions
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NewRisingSun (talk | contribs) (Created page with "{{DEFAULTSORT:417}}Category:Mappers with cycle IRQs '''NES 2.0 Mapper 417''' denotes the PCB of the "Fine Studio" bootleg copy of ''Batman: The Video Game''. =Banks= * CP...") |
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The counter increases on every M2 cycle regardless of IRQ enable status. If enabled, an IRQ is generated upon 10-bit counter overflow. | The counter increases on every M2 cycle regardless of IRQ enable status. If enabled, an IRQ is generated upon 10-bit counter overflow. | ||
==CIRAM Bank Select | ==CIRAM Bank Select== | ||
Mask: $8073 | Mask: $8073 | ||
Write to $8050: Select 1 KiB CIRAM bank at PPU $2000 | Write to $8050: Select 1 KiB CIRAM bank at PPU $2000 | ||
Revision as of 21:04, 15 December 2020
NES 2.0 Mapper 417 denotes the PCB of the "Fine Studio" bootleg copy of Batman: The Video Game.
Banks
- CPU $8000-$9FFF: 8 KiB switchable PRG-ROM bank
- CPU $A000-$BFFF: 8 KiB switchable PRG-ROM bank
- CPU $C000-$DFFF: 8 KiB switchable PRG-ROM bank
- CPU $E000-$FFFF: 8 KiB fixed PRG-ROM bank, last
- PPU $0000-$03FF: 1 KiB switchable CHR-ROM bank
- PPU $0400-$07FF: 1 KiB switchable CHR-ROM bank
- PPU $0800-$0BFF: 1 KiB switchable CHR-ROM bank
- PPU $0C00-$0FFF: 1 KiB switchable CHR-ROM bank
- PPU $1000-$13FF: 1 KiB switchable CHR-ROM bank
- PPU $1400-$17FF: 1 KiB switchable CHR-ROM bank
- PPU $1800-$1BFF: 1 KiB switchable CHR-ROM bank
- PPU $1C00-$1FFF: 1 KiB switchable CHR-ROM bank
- PPU $2000-$23FF: 1 KiB switchable CIRAM bank
- PPU $2400-$27FF: 1 KiB switchable CIRAM bank
- PPU $2800-$2BFF: 1 KiB switchable CIRAM bank
- PPU $2C00-$2FFF: 1 KiB switchable CIRAM bank
Registers
PRG-ROM Bank Select
Mask: $8073 Write to $8000: Select 8 KiB PRG-ROM bank at CPU $8000 Write to $8001: Select 8 KiB PRG-ROM bank at CPU $A000 Write to $8002: Select 8 KiB PRG-ROM bank at CPU $C000
CHR-ROM Bank Select
Mask: $8073 Write to $8010: Select 1 KiB CHR-ROM bank at PPU $0000 Write to $8011: Select 1 KiB CHR-ROM bank at PPU $0400 Write to $8012: Select 1 KiB CHR-ROM bank at PPU $0800 Write to $8013: Select 1 KiB CHR-ROM bank at PPU $0C00 Write to $8020: Select 1 KiB CHR-ROM bank at PPU $1000 Write to $8021: Select 1 KiB CHR-ROM bank at PPU $1400 Write to $8022: Select 1 KiB CHR-ROM bank at PPU $1800 Write to $8023: Select 1 KiB CHR-ROM bank at PPU $1C00
IRQ Control
Mask: $8070 Write to $8030: Reset counter and enable IRQ Write to $8040: Disable and acknowledge IRQ
The counter increases on every M2 cycle regardless of IRQ enable status. If enabled, an IRQ is generated upon 10-bit counter overflow.
CIRAM Bank Select
Mask: $8073 Write to $8050: Select 1 KiB CIRAM bank at PPU $2000 Write to $8051: Select 1 KiB CIRAM bank at PPU $2400 Write to $8052: Select 1 KiB CIRAM bank at PPU $2800 Write to $8053: Select 1 KiB CIRAM bank at PPU $2C00
