INES Mapper 155: Difference between revisions
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[[Category:iNES Mappers|155]] | [[Category:iNES Mappers|155]] | ||
[[iNES Mapper 155]] is | [[iNES Mapper 155]] is assigned to the MMC1A variant of the [[MMC1]]. Unlike MMC1B and MMC1C, MMC1A lacks the WRAM disable bit in the PRG bank register ($E000-$FFFF). Games that use this mapper write values between $10 and $1F to the PRG bank register, write to WRAM at $6000-$7FFF, and require the write to succeed. | ||
According to the database shipped with Nestopia | According to the database shipped with Nestopia 1.4.0, these two Famicom games require this behavior: | ||
* Tatakae!! Ramen Man: Sakuretsu Choujin 102 Gei (闘将！！拉麺男 炸裂超人一○二芸) | * Tatakae!! Ramen Man: Sakuretsu Choujin 102 Gei (闘将！！拉麺男 炸裂超人一○二芸) ([http://bootgod.dyndns.org:7777/profile.php?id=3736 NesCartDB]) | ||
* The Money Game (ザ・マネーゲーム) | * The Money Game (ザ・マネーゲーム) ([http://bootgod.dyndns.org:7777/profile.php?id=3458 NesCartDB]) | ||
Either this was done as a copy protection mechanism or the programmers just weren't aware that later MMC1 revisions would add a bit for disabling WRAM. | |||
Technically, these two games are on [[SxROM|SKROM and SJROM]], and so theoretically this mapper should not have to implement any of the boards that repurpose PRG or CHR pins (SE-, SH-, SN-, SO-, SU-, SX-ROM). However, it is probably still wise to pay attention to the caveats said [[MMC1|here]] and [[iNES Mapper 001|here]]. | Technically, these two games are on [[SxROM|SKROM and SJROM]], and so theoretically this mapper should not have to implement any of the boards that repurpose PRG or CHR pins (SE-, SH-, SN-, SO-, SU-, SX-ROM). However, it is probably still wise to pay attention to the caveats said [[MMC1|here]] and [[iNES Mapper 001|here]]. | ||
Revision as of 15:10, 5 January 2014
iNES Mapper 155 is assigned to the MMC1A variant of the MMC1. Unlike MMC1B and MMC1C, MMC1A lacks the WRAM disable bit in the PRG bank register ($E000-$FFFF). Games that use this mapper write values between $10 and $1F to the PRG bank register, write to WRAM at $6000-$7FFF, and require the write to succeed.
According to the database shipped with Nestopia 1.4.0, these two Famicom games require this behavior:
- Tatakae!! Ramen Man: Sakuretsu Choujin 102 Gei (闘将！！拉麺男 炸裂超人一○二芸) (NesCartDB)
- The Money Game (ザ・マネーゲーム) (NesCartDB)
Either this was done as a copy protection mechanism or the programmers just weren't aware that later MMC1 revisions would add a bit for disabling WRAM.
Technically, these two games are on SKROM and SJROM, and so theoretically this mapper should not have to implement any of the boards that repurpose PRG or CHR pins (SE-, SH-, SN-, SO-, SU-, SX-ROM). However, it is probably still wise to pay attention to the caveats said here and here.
