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no edit summary
3-4 Unused
3-4 Unused
5 Read FIFO Full Flag (0=No, 1=Yes)
5 Read FIFO Full Flag (0=No, 1=Yes)
6 Read FIFO Not-Empty Flag (0=No, 1=Yes) ;ARM9 may read DSP_PDATA
6 Read FIFO Not-Empty Flag (0=No, 1=Yes) ;ARM11 may read DSP_PDATA
7 Write FIFO Full Flag (0=No, 1=Yes)
7 Write FIFO Full Flag (0=No, 1=Yes)
8 Write FIFO Empty Flag (0=No, 1=Yes)
8 Write FIFO Empty Flag (0=No, 1=Yes)
Unknown if/when bit10-15 get reset... maybe after reading the status?
Unknown if/when bit10-15 get reset... maybe after reading the status?
=== DSP_PSEM - ARM9-to-DSP Semaphore (16bit) ===
=== DSP_PSEM - ARM11-to-DSP Semaphore (16bit) ===
0-15 DSP-to-ARM9 Semaphore 0..15 Flags (0=Off, 1=On)
0-15 DSP-to-ARM11 Semaphore 0..15 Flags (0=Off, 1=On)
Reportedly these flags are sent in ARM9-to-DSP direction.
Reportedly these flags are sent in ARM11-to-DSP direction.
Confusingly, the other DSP_Pxxx registers are for opposite direction?
Confusingly, the other DSP_Pxxx registers are for opposite direction?
=== DSP_PMASK - DSP-to-ARM9 Semaphore Mask (16bit) ===
=== DSP_PMASK - DSP-to-ARM11 Semaphore Mask (16bit) ===
0-15 DSP-to-ARM9 Semaphore 0..15 Interrupt Disable (0=Enable, 1=Disable)
0-15 DSP-to-ARM11 Semaphore 0..15 Interrupt Disable (0=Enable, 1=Disable)
=== DSP_PCLEAR - DSP-to-ARM9 Semaphore Clear (W) (16bit) ===
=== DSP_PCLEAR - DSP-to-ARM11 Semaphore Clear (W) (16bit) ===
0-15 DSP-to-ARM9 Semaphore 0..15 Clear (0=No Change, 1=Clear)
0-15 DSP-to-ARM11 Semaphore 0..15 Clear (0=No Change, 1=Clear)
Reportedly clears bits in DSP_PSEM/4004310h. [that's probably nonsense, clearing bits in DSP_SEM/400431Ch would make more sense]
Reportedly clears bits in DSP_PSEM. [that's probably nonsense, clearing bits in DSP_SEM would make more sense]
=== DSP_SEM - DSP-to-ARM9 Semaphore Data (R) (16bit) ===
=== DSP_SEM - DSP-to-ARM9 Semaphore Data (R) (16bit) ===
0-15 DSP-to-ARM9 Semaphore 0..15 Flags (0=Off, 1=On)
0-15 DSP-to-ARM11 Semaphore 0..15 Flags (0=Off, 1=On)
Reportedly these flags are received in DSP-to-ARM9 direction.
Reportedly these flags are received in DSP-to-ARM11 direction.
=== DSP_CMDX - DSP Command Reg. X (R/W) (ARM9 to DSP) (16bit) ===
=== DSP_CMDX - DSP Command Reg. X (R/W) (ARM11 to DSP) (16bit) ===
0-15 Command/Data to DSP
0-15 Command/Data to DSP
=== DSP_REPX - DSP Reply Register X (R) (DSP to ARM9) (16bit) ===
=== DSP_REPX - DSP Reply Register X (R) (DSP to ARM9) (16bit) ===
0-15 Reply/Data from DSP
0-15 Reply/Data from DSP