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)