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Soul Star (Mega CD) stage 2 mission briefing is garbled. #360

Closed GoogleCodeExporter closed 9 years ago

GoogleCodeExporter commented 9 years ago 
Soul Star seems to occasionally become glitched on genplus-gx (running r812 
here). After playing through the first stage (that's one open space section, a 
brief planet surface section, followed by another brief space section), the 
mission briefing begins for the second stage with garbled graphics (sound is 
fine).

The briefing should look roughly like the first, with an in-game screen in the 
center of the image displaying the objectives in faux-vector graphics. Attached 
are a genplus-gx savestate of the issue along with its associated screenshot to 
demonstrate the issue. The entire screen seems to have scrolled to the left 
somewhat, looping back around from the right with some significant glitching.

If necessary, I can also provide a save state from the end of the first stage, 
before the bug actually shows itself.

I've also experienced a different bug when opening the Options menu from the 
title screen: sometimes the text is in an entirely black palette (against very 
dark green)instead of the correct orange, making it essentially illegible. 
Opening and closing the Options menu rapidly seems to trigger this on about one 
in five attempts.

Original issue reported on code.google.com by vaguerant on 16 Sep 2013 at 1:58

Attachments:

GoogleCodeExporter commented 9 years ago 
[deleted comment]
GoogleCodeExporter commented 9 years ago 

A savestate before that scene would indeed helps, internal game saves (if 
possible) through a copy of .brm file also.

I reproduced the bug in option menu, it seems to be caused by some timing 
discrepancies but I am not sure it doesn't also happen on real hardware. Anyone 
that could test it ?

Original comment by ekeeke31@gmail.com on 17 Sep 2013 at 6:28

GoogleCodeExporter commented 9 years ago 
Here's a save state from right at the end of the first stage. The ship will fly 
into the docking bay, then an FMV of it transforming will play. After this FMV, 
the mission briefing begins.

From this save state I'm able to achieve both a working briefing and a glitched 
one. Allowing the FMV to play through naturally (it's very short, maybe five 
seconds) results in the briefing appearing as expected. Skipping the FMV using 
the Start button results in the glitched version.

Unfortunately, Soul Star doesn't seem to save progress, so save states are the 
only option.

Original comment by vaguerant on 18 Sep 2013 at 5:39

Attachments:

GoogleCodeExporter commented 9 years ago 
I had this gfx garbage also once, but the next time they weren't there.

Original comment by gora.pat...@gmail.com on 18 Sep 2013 at 6:38

GoogleCodeExporter commented 9 years ago 
This was caused by some desync between Main-CPU and SUB-CPU, it has been fixed 
in r834

Original comment by ekeeke31@gmail.com on 28 Oct 2013 at 9:58