NES 2.0 Mapper 481: Difference between revisions
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==Bank register ($8000-$FFFF, write)== | ==Bank register ($8000-$FFFF, write)== | ||
D~[O... .BBB], Address mask: $8000 | D~[O... .BBB], Address mask: $8000 | ||
| +++- PRG | | +++- PRG A16..A14 if CPU A14=0 | ||
| 7 if CPU A14=1 | | 7 if CPU A14=1 | ||
+--------- PRG | +--------- PRG A17 regardless of CPU A14 | ||
==Notes== | ==Notes== | ||
The common dump of ''小霸王 2合1꞉ 仓库世家 & 动脑筋'' is a barely-working overdump for [[INES Mapper 241]] that has the first game inaccessible and boots into the middle of the second game without showing its title screen. | The common dump of ''小霸王 2合1꞉ 仓库世家 & 动脑筋'' is a barely-working overdump for [[INES Mapper 241]] that has the first game inaccessible and boots into the middle of the second game without showing its title screen. | ||
Latest revision as of 01:39, 18 December 2024
NES 2.0 Mapper 481 denotes the Subor 045N PCB, used on at least one educational computer cartridge with two games on it. It's basically 2x128 KiB of UNROM, switched by an outer bank bit.
- 小霸王 2合1꞉ 仓库世家 & 动脑筋
Banks
- CPU 8000-BFFF: Switchable 16 KiB inner bank
- CPU C000-FFFF: Fixed 16 KiB inner bank 7
- PPU 0000-1FFF: 8 KiB unbanked CHR-RAM
- Mirroring: hard-wired to horizontal or vertical
Bank register ($8000-$FFFF, write)
D~[O... .BBB], Address mask: $8000 | +++- PRG A16..A14 if CPU A14=0 | 7 if CPU A14=1 +--------- PRG A17 regardless of CPU A14
Notes
The common dump of 小霸王 2合1꞉ 仓库世家 & 动脑筋 is a barely-working overdump for INES Mapper 241 that has the first game inaccessible and boots into the middle of the second game without showing its title screen.
