Talk:NES 2.0 Mapper 268: Difference between revisions
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:::: There is only a single multicart ("Ultimate NES Remix - Super 154-in-1" from "GameJoy") using submapper 3 at the moment, and none that use submapper 2. It uses the SMD172C-L1 PCB. The current dump was produced by trial-and-error using the Tengu dumper, so it may be that its correct PRG bank order is actually that of what you described as submapper 8/9. If that is so, submapper 2/3 actually does not exist, so what you described as submappers 8/9 should be ''moved'' to submappers 2/3, and the current ROM image of "Ultimate NES Remix - Super 154-in-1" should have its address lines reordered. The ASIC markings have been sanded off, but the SMD172C-L1 PCB has a date code of 20210830. [[User:NewRisingSun|NewRisingSun]] ([[User talk:NewRisingSun|talk]]) 19:27, 8 December 2022 (UTC) | :::: There is only a single multicart ("Ultimate NES Remix - Super 154-in-1" from "GameJoy") using submapper 3 at the moment, and none that use submapper 2. It uses the SMD172C-L1 PCB. The current dump was produced by trial-and-error using the Tengu dumper, so it may be that its correct PRG bank order is actually that of what you described as submapper 8/9. If that is so, submapper 2/3 actually does not exist, so what you described as submappers 8/9 should be ''moved'' to submappers 2/3, and the current ROM image of "Ultimate NES Remix - Super 154-in-1" should have its address lines reordered. The ASIC markings have been sanded off, but the SMD172C-L1 PCB has a date code of 20210830. [[User:NewRisingSun|NewRisingSun]] ([[User talk:NewRisingSun|talk]]) 19:27, 8 December 2022 (UTC) | ||
::::: Yep, we can move it to 2/3, i think. I'll fix fceux code to match it. [[User:Cluster|Cluster]] ([[User talk:Cluster|talk]]) 19:31, 8 December 2022 (UTC) | ::::: Yep, we can move it to 2/3, i think. I'll fix fceux code to match it. [[User:Cluster|Cluster]] ([[User talk:Cluster|talk]]) 19:31, 8 December 2022 (UTC) | ||
:::::: Not so fast; I must research first ''if'' the 154-in-1 is really that new ASIC version. When did that ASIC version come out? Can you ask the developer if it was already used on the SMD172C-L1 PCB from 2021? [[User:NewRisingSun|NewRisingSun]] ([[User talk:NewRisingSun|talk]]) 19:39, 8 December 2022 (UTC) |
Revision as of 19:39, 8 December 2022
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)
- There is only a single multicart ("Ultimate NES Remix - Super 154-in-1" from "GameJoy") using submapper 3 at the moment, and none that use submapper 2. It uses the SMD172C-L1 PCB. The current dump was produced by trial-and-error using the Tengu dumper, so it may be that its correct PRG bank order is actually that of what you described as submapper 8/9. If that is so, submapper 2/3 actually does not exist, so what you described as submappers 8/9 should be moved to submappers 2/3, and the current ROM image of "Ultimate NES Remix - Super 154-in-1" should have its address lines reordered. The ASIC markings have been sanded off, but the SMD172C-L1 PCB has a date code of 20210830. NewRisingSun (talk) 19:27, 8 December 2022 (UTC)
- Yep, we can move it to 2/3, i think. I'll fix fceux code to match it. Cluster (talk) 19:31, 8 December 2022 (UTC)
- Not so fast; I must research first if the 154-in-1 is really that new ASIC version. When did that ASIC version come out? Can you ask the developer if it was already used on the SMD172C-L1 PCB from 2021? NewRisingSun (talk) 19:39, 8 December 2022 (UTC)
- Yep, we can move it to 2/3, i think. I'll fix fceux code to match it. Cluster (talk) 19:31, 8 December 2022 (UTC)
- There is only a single multicart ("Ultimate NES Remix - Super 154-in-1" from "GameJoy") using submapper 3 at the moment, and none that use submapper 2. It uses the SMD172C-L1 PCB. The current dump was produced by trial-and-error using the Tengu dumper, so it may be that its correct PRG bank order is actually that of what you described as submapper 8/9. If that is so, submapper 2/3 actually does not exist, so what you described as submappers 8/9 should be moved to submappers 2/3, and the current ROM image of "Ultimate NES Remix - Super 154-in-1" should have its address lines reordered. The ASIC markings have been sanded off, but the SMD172C-L1 PCB has a date code of 20210830. NewRisingSun (talk) 19:27, 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)