INES Mapper 159: Difference between revisions
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(however, a few of my ROMs had the wrong mappers on them, so note exactly which ones should use which mapper) |
(→Registers: what's the distinction between the X24C01 and 24C01? elucidate.) |
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[[Category:iNES Mappers|159]][[Category:Mappers with cycle IRQs|159]] | |||
[[ | iNES Mapper 159 is used for [[Bandai FCG]] boards with an [[Bandai LZ93D50 pinout|LZ93D50 ASIC]] and a 128-byte serial EEPROM (X24C01). The 128 bytes must be denoted as PRG-NVRAM in the [[NES 2.0]] header using byte value $10. | ||
=Game List= | |||
* ''Dragon Ball Z: Kyoushuu! Saiya-jin'' | |||
* ''Magical Taruruuto-kun: Fantastic World!!'' | |||
* ''Magical Taruruuto-kun 2: Mahou Daibouken'' | |||
* ''SD Gundam Gaiden - Knight Gundam Monogatari'' | |||
=Banks= | |||
* | * CPU $8000-$BFFF: 16 KiB switchable PRG ROM bank | ||
* | * CPU $C000-$FFFF: 16 KiB PRG ROM bank, fixed to the last bank | ||
* | * 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 | |||
[[ | =Registers= | ||
All registers function the same way as [[INES Mapper 016]], submapper 5, except that the serial EEPROM is not a 24C02 but Xicor's X24C01. This EEPROM has operational differences compared to both the larger 24C02 and other vendors' 24C01. Bandai's developers consistently thought the X24C01 was a little-endian device, and their code clocks in address and data bytes assuming this. However, it's actually a big-endian device, and a multi-byte read or write from EEPROM will increment the address accordingly. | |||
Latest revision as of 00:11, 10 May 2020
iNES Mapper 159 is used for Bandai FCG boards with an LZ93D50 ASIC and a 128-byte serial EEPROM (X24C01). The 128 bytes must be denoted as PRG-NVRAM in the NES 2.0 header using byte value $10.
Game List
- Dragon Ball Z: Kyoushuu! Saiya-jin
- Magical Taruruuto-kun: Fantastic World!!
- Magical Taruruuto-kun 2: Mahou Daibouken
- SD Gundam Gaiden - Knight Gundam Monogatari
Banks
- CPU $8000-$BFFF: 16 KiB switchable PRG ROM bank
- CPU $C000-$FFFF: 16 KiB PRG ROM bank, fixed to the last bank
- 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
Registers
All registers function the same way as INES Mapper 016, submapper 5, except that the serial EEPROM is not a 24C02 but Xicor's X24C01. This EEPROM has operational differences compared to both the larger 24C02 and other vendors' 24C01. Bandai's developers consistently thought the X24C01 was a little-endian device, and their code clocks in address and data bytes assuming this. However, it's actually a big-endian device, and a multi-byte read or write from EEPROM will increment the address accordingly.
