I would like to point to Naruko's post where he's given us a comprehensive description of the Sunsoft-4, and how it's used in all three games. Especially the game Nantettatte!! Baseball, which uses an external pluggable options ROM to update it with new season data (I think?)
His writeup survived machine translation surprisingly well, and I've done my best to incorporate the information into the wiki.
He ends with a plea to emulator authors to please fix support for loading these external ROMs with Nantettatte!! Baseball. He suggests a possible iNES layout for it, but it strikes me as roundabout. Dumps of the base game plus expansion are currently available as UNIF in GoodNES3.1.4:
If you have any questions, you can ask me or in his post.
His writeup survived machine translation surprisingly well, and I've done my best to incorporate the information into the wiki.
He ends with a plea to emulator authors to please fix support for loading these external ROMs with Nantettatte!! Baseball. He suggests a possible iNES layout for it, but it strikes me as roundabout. Dumps of the base game plus expansion are currently available as UNIF in GoodNES3.1.4:
Code:
$ crc32 *PRG1
fdb61142 Nantettatte!! Baseball '91 Kaimaku Hen (J) [U][!].PRG1
dc0bd3c3 Nantettatte!! Baseball OB Allstar Hen (J) [U][!].PRG1
$ cat *91*PRG1 *91*PRG1 > doubled; crc32 doubled
d1d4a6a1
So he's verified the UNIF dump of one expansion.fdb61142 Nantettatte!! Baseball '91 Kaimaku Hen (J) [U][!].PRG1
dc0bd3c3 Nantettatte!! Baseball OB Allstar Hen (J) [U][!].PRG1
$ cat *91*PRG1 *91*PRG1 > doubled; crc32 doubled
d1d4a6a1
If you have any questions, you can ask me or in his post.