Talk:NES 2.0 Mapper 268

Official documentation

I added files shared by the original developer of this mapper. There is some interesting info that can be added to the article. Cluster (talk) 00:15, 30 July 2021 (UTC)

Submapper 8/9

Why do we need a submapper for this? As I see it, it's merely submapper 2/3 with A20/A21/A22 in a different order. NewRisingSun (talk) 20:03, 7 December 2022 (UTC)

So, it's not compatible with 2/3 because of A20/A21/A22 in a different order. There are ROMs which can't be emulated using existing submappers. I see no reason why they shouldn't be added. Also, AFAIK from the developer, all new ASICs will use this submapper. Cluster (talk) 15:19, 8 December 2022 (UTC)

The reason is that there can only be sixteen submappers, or eight pairs of two, so I don't want to waste them. It must be investigated whether the address order of 2 and 8, respectively are indeed correct, or one is based on misordered ROM files. Misordered ROM files should be correctly ordered instead of adding submappers for incorrectly-ordered ROM files. What is the source for the submapper 8 address line order? NewRisingSun (talk) 18:01, 8 December 2022 (UTC)

This is info from the ASIC developer from China. He says that it's ASIC version "23b" and all new chips will be this version now. I have multiple dumps from the desoldered flash chips and multiple binary files sent by the developer. Cluster (talk) 18:17, 8 December 2022 (UTC)

Also, please note that this submapper is really needed by people who making their own multigame ROMs for cartridges. They need to emulate them somehow. Cluster (talk) 18:27, 8 December 2022 (UTC)