NES 2.0 Mapper 401: Difference between revisions
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NES 2.0 Mapper 401 | {{DEFAULTSORT:401}}[[Category:MMC3-like mappers]][[Category:Multicart mappers]][[Category:Mappers with scanline IRQs]] | ||
'''NES 2.0 Mapper 401''' denotes the '''KC885''' multicart circuit board, used for the ''Super 19-in-1'' (VIP19) multicart. It is basically [[INES Mapper 045|mapper 45]] with the higher address lines connected weirdly. | |||
* PRG A13-A17: from $6000 #1 bits 0-4, same as mapper 45 | |||
* PRG A18: either from $6000 #2 bit 5 or from $6000 #1 bit 6, depending on solder pad setting | |||
* PRG A19: either from $6000 #2 bit 6 or from $6000 #1 bit 5, depending on solder pad setting | |||
* PRG /CE: $6000 #1 bit 7, if solder pad connected | |||
The menu code tries the two ways of selecting PRG A18 and A19 and whether $6000 #1 bit 7 disables PRG-ROM, and selects one of eight different menus based on what it finds. Other multicarts using mapper 45's chipset do the same thing; KC885 is unique in that the standard mapper 45 way of connecting PRG-ROM will not work at all. | |||
Latest revision as of 19:22, 11 December 2021
NES 2.0 Mapper 401 denotes the KC885 multicart circuit board, used for the Super 19-in-1 (VIP19) multicart. It is basically mapper 45 with the higher address lines connected weirdly.
- PRG A13-A17: from $6000 #1 bits 0-4, same as mapper 45
- PRG A18: either from $6000 #2 bit 5 or from $6000 #1 bit 6, depending on solder pad setting
- PRG A19: either from $6000 #2 bit 6 or from $6000 #1 bit 5, depending on solder pad setting
- PRG /CE: $6000 #1 bit 7, if solder pad connected
The menu code tries the two ways of selecting PRG A18 and A19 and whether $6000 #1 bit 7 disables PRG-ROM, and selects one of eight different menus based on what it finds. Other multicarts using mapper 45's chipset do the same thing; KC885 is unique in that the standard mapper 45 way of connecting PRG-ROM will not work at all.
