INES Mapper 081: Difference between revisions
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{{DEFAULTSORT:81}}[[Category:INES Mappers]][[Category:GNROM-like mappers]][[Category:Mappers with bus conflicts]] | {{DEFAULTSORT:81}}[[Category:INES Mappers]][[Category:GNROM-like mappers]][[Category:Mappers with bus conflicts]] | ||
This mapper is used on exactly one known game: Super Gun from NTDEC (cartridge code CN- | This mapper is used on exactly one known game: Super Gun from NTDEC (cartridge code CN-12). | ||
==Banks== | ==Banks== | ||
Revision as of 15:07, 27 August 2017
N715021
| Company | NTDEC |
| Complexity | Discrete logic |
| Boards | N715021 |
| PRG ROM capacity | 64K |
| PRG ROM window | 16K + 16K fixed |
| PRG RAM capacity | None |
| CHR capacity | 32K |
| CHR window | 8K |
| Nametable mirroring | Fixed H or V, controlled by solder pads |
| Bus conflicts | Yes |
| IRQ | No |
| Audio | No |
| iNES mappers | 081 |
This mapper is used on exactly one known game: Super Gun from NTDEC (cartridge code CN-12).
Banks
- CPU $8000-$BFFF: 16 KB switchable PRG ROM bank
- CPU $C000-$FFFF: 16 KB PRG ROM bank, fixed to the last bank
- PPU $0000-$1FFF: 8 KB switchable CHR ROM bank
Registers
CHR Bank Select ($6000-$7FFF)
7 bit 0 ---- ---- ..CC .... || ++------ Select 8 KB CHR ROM bank for PPU $0000-$1FFF
PRG Bank Select ($8000-$FFFF)
7 bit 0
---- ----
.... PP..
||
++--- Select 16 KB PRG ROM bank for CPU $8000-$BFFF
