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MiSTer-devel / Saturn_MiSTer

Sega Saturn for MiSTer
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Pyon Pyon Kyaruru no Mahjong Biyori // Corruption In Intro On Single RAM Build (10-30-2024~) #251

Open InfernoHabanero opened 1 month ago

InfernoHabanero commented 1 month ago

Screenshot 2024-09-21 00-16-55

In the intro to Pyon Pyon Kyaruru no Mahjong Biyori, there a brief moment where the graphics corrupt. This is easy to replicate; all you need to do is let the intro play out and it's guaranteed to show up.

Tested on both the 09/18/2024 single and dual RAM builds with 128MB 2.9 RAM modules.

Zet-sensei commented 3 days ago

Fixed with commit https://github.com/MiSTer-devel/Saturn_MiSTer/commit/d7aee5703a2ff8b9829ccb1f78726b04f6031864 on a Dual RAM system.

InfernoHabanero commented 3 days ago

Yeah I can confirm it's fixed on the dual RAM build. Single RAM build actually has worse glitching though, so this is a two-steps-back-two-steps-forward solution.

I'm going to still keep this open, but with the clarification that this is still a problem with the single RAM build.

srg320 commented 3 days ago

The intro is very dependent on the RAM-H access speed. In a single sdram build, RAM-H (and 6 other core memories) is located in ddram, which has low latency. So it is impossible to make the intro work correctly in a single sdram build.