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SPU2-X: Change initial IRQA value, fixes F1 2005. This is a weird one, read the long comment. 

git-svn-id: http://pcsx2.googlecode.com/svn/trunk@4746 96395faa-99c1-11dd-bbfe-3dabce05a288
This commit is contained in:
sudonim1@gmail.com 2011-06-15 18:01:04 +00:00
parent 86b80f2603
commit b16629acc9
1 changed files with 9 additions and 1 deletions
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10
plugins/spu2-x/src/spu2sys.cpp
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@ -146,7 +146,15 @@ void V_Core::Init( int index )
EffectsEndA = c ? 0xFFFFF : 0xEFFFF;
FxEnable = 0; // Uninitialized it's 0 for both cores. Resetting libs however may set this to 0 or 1.
IRQA = 0xFFFFF; //0x40505E9C : 0x3220EAA4; // << Actual PS2 values, so this is uninitialized.
// These are real PS2 values, mainly constant apart from a few bits: 0x3220EAA4, 0x40505E9C.
// These values mean nothing. They do not reflect the actual address the SPU2 is testing,
// it would seem that reading the IRQA register returns the last written value, not the
// value of the internal register. Rewriting the registers with their current values changes
// whether interrupts fire (they do while uninitialised, but do not when rewritten).
// The exact boot value is unknown and probably unknowable, but it seems to be somewhere
// in the input or output areas, so we're using 0x800.
// F1 2005 is known to rely on an uninitialised IRQA being an address which will be hit.
IRQA = 0x800;
IRQEnable = 0; // PS2 confirmed
for( uint v=0; v<NumVoices; ++v )