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| 0x13 || No || When value is 0 or higher, store it on addr. Only u8 seems to be used.
| 0x13 || No || When value is 0 or higher, store it on addr. Only u8 seems to be used.
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| 0x14 || Partially || SPU emulation related command. Command use 2x u8 value.
| 0x14 || No || SPU emulation related command. Command use 2x u8 value.
  value1 = cmdValue & 0xFF        // Used only to compare for equality with some value at some point.
  value1 = cmdValue & 0xFF        // Used only to compare for equality with some value at some point.
  value2 = (cmdValue >> 8) & 0xFF // Used if compare mentioned above is true.
  value2 = (cmdValue >> 8) & 0xFF // Used if compare mentioned above is true.
If whole s16 cmd is higher than 0 different code path is used in SPU DMA handler.  
Additionally, if whole s16 cmd is higher than 0 different code path is used in SPU DMA handler.  
Additionally on Vita this command has "hidden" setting by bit 18. This setting is seeming to be not available on PSP
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| 0x15 || No || Set shell open for little longer during disc swap. Some games take a while to realize that shell is opened, this setting helps them. Value is multiplier for predefined value, 1 is taking around 3,5 seconds, 2 around 7 seconds, etc.
| 0x15 || No || Set shell open for little longer during disc swap. Some games take a while to realize that shell is opened, this setting helps them. Value is multiplier for predefined value, 1 is taking around 3,5 seconds, 2 around 7 seconds, etc.
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