Increase frequency of Interrupts/DMA instance checks during scanline#263
Draft
andymcca wants to merge 1 commit intolibretro:masterfrom
Draft
Increase frequency of Interrupts/DMA instance checks during scanline#263andymcca wants to merge 1 commit intolibretro:masterfrom
andymcca wants to merge 1 commit intolibretro:masterfrom
Conversation
This resolves issue libretro#224. All games in this issue (all from the same developer) generate a high number of DMA/IRQ requests per scanline relative to other games. Theory is that the default frequency (about once or twice per scanline) isn't enough for these to be fired in a timely fashion for these games, resulting in the graphics corruption reported in the issue. This PR significantly reduces the number of cycles that are run before update_gba is called to check for DMA/IRQ status, which resolves the corrupted graphics. Casual testing with other games hasn't shown any side affects but full impact testing with other games will be needed.
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
1 participant
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
This resolves issue #224. All games in this issue (all from the same developer) generate a high number of DMA/IRQ requests per scanline relative to other games. Theory is that the default frequency (about once or twice per scanline) isn't enough for these to be fired in a timely fashion for these games, resulting in the graphics corruption reported in the issue.
This PR significantly reduces the number of cycles that are run before update_gba is called to check for DMA/IRQ status, which resolves the corrupted graphics. Casual testing with other games hasn't shown any side affects but full impact testing with other games will be needed.