Talk:INES Mapper 043: Difference between revisions
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How confident are you about the masks? Involving 12 bits is a surprisingly large number. And A15 has to be involved—as is, writes to NES internal RAM ($0122, $0322, &c) would control IRQs. —[[User:Lidnariq|Lidnariq]] ([[User talk:Lidnariq|talk]]) 12:09, 20 April 2018 (MDT) | How confident are you about the masks? Involving 12 bits is a surprisingly large number. And A15 has to be involved—as is, writes to NES internal RAM ($0122, $0322, &c) would control IRQs. —[[User:Lidnariq|Lidnariq]] ([[User talk:Lidnariq|talk]]) 12:09, 20 April 2018 (MDT) | ||
:It's from the original Nintendulator source code. FCEUX implements this mapper somewhat differently, but also checks for a very specific mask. [[User:NewRisingSun|NewRisingSun]] ([[User talk:NewRisingSun|talk]]) 15:01, 20 April 2018 (MDT) | :It's from the original Nintendulator source code. FCEUX implements this mapper somewhat differently, but also checks for a very specific mask. [[User:NewRisingSun|NewRisingSun]] ([[User talk:NewRisingSun|talk]]) 15:01, 20 April 2018 (MDT) | ||
:And it turns out the reason FCEUX implements it differently is that it actually puts yet another SMB2J conversion (Mr. Mary 2) under the same mapper 43, which (of course) uses different hardware than Whirlwind Manu's LF36; for one thing, LF36 uses CHR-ROM, while Mr. Mary 2 uses CHR-RAM. I think I'm going to go nuts trying to document all the different SMB2J conversions. :P [[User:NewRisingSun|NewRisingSun]] ([[User talk:NewRisingSun|talk]]) 15:16, 20 April 2018 (MDT) | |||
Revision as of 21:16, 20 April 2018
Register mask
How confident are you about the masks? Involving 12 bits is a surprisingly large number. And A15 has to be involved—as is, writes to NES internal RAM ($0122, $0322, &c) would control IRQs. —Lidnariq (talk) 12:09, 20 April 2018 (MDT)
- It's from the original Nintendulator source code. FCEUX implements this mapper somewhat differently, but also checks for a very specific mask. NewRisingSun (talk) 15:01, 20 April 2018 (MDT)
- And it turns out the reason FCEUX implements it differently is that it actually puts yet another SMB2J conversion (Mr. Mary 2) under the same mapper 43, which (of course) uses different hardware than Whirlwind Manu's LF36; for one thing, LF36 uses CHR-ROM, while Mr. Mary 2 uses CHR-RAM. I think I'm going to go nuts trying to document all the different SMB2J conversions. :P NewRisingSun (talk) 15:16, 20 April 2018 (MDT)
