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Graphical corruption (ScummVM DS 0.61 Max Media Dock)
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MisterSentient



Joined: 23 Aug 2006
Posts: 9
Graphical corruption (ScummVM DS 0.61 Max Media Dock) 

agentq: I have noticed a mysterious black line appearing on both screens while playing games with ScummVM DS. It always seems to appear in a different spot and only for a brief moment. It looks like the graphic data is getting corrupted somehow. Is this possibly an issue with the MMCF FAT code I am using in my version of ScummVM DS? Have you heard of this issue?

I am currently using the version of ScummVM 0.61 I created for the Max Media Dock.

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Post Sat Aug 26, 2006 12:19 pm 
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agentq
ScummVM Porter


Joined: 21 Dec 2005
Posts: 806
Location: London, UK
 

The black lines are nothing to do with the FAT code, but seem to be the result of a DMA transfer within a bitmap buffer without the source data being flushed from the CPU write cache. I put in code to flush the cache but it only reduced the problem, not eliminating it altogether.

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Post Sun Aug 27, 2006 5:21 am 
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MisterSentient



Joined: 23 Aug 2006
Posts: 9
 

quote:
Originally posted by agentq
The black lines are nothing to do with the FAT code, but seem to be the result of a DMA transfer within a bitmap buffer without the source data being flushed from the CPU write cache. I put in code to flush the cache but it only reduced the problem, not eliminating it altogether.


Okay. I was just worried that there might be something wrong with my MMD version.

Are you the only one working on ScummVM DS at the moment?
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Post Sun Aug 27, 2006 12:16 pm 
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