0x1EC03000
| NAME | PHYSICAL ADDRESS | WIDTH | DESCRIPTION |
|---|---|---|---|
| REG_DSP_FIFO | 0x1ED03000 | 2 | |
| REG_DSP_?? | 0x1ED03004 | 2 | ??? |
| REG_DSP_FIFO_CNT | 0x1ED03008 | 2 | |
| REG_DSP_?? | 0x1ED03010 | 2 | ??? |
| REG_DSP_STATUS | 0x1ED0300C | 2 | |
| REG_DSP_?? | 0x1ED03014 | 2 | ??? |
| REG_DSP_?? | 0x1ED03018 | 2 | ??? |
| REG_DSP_?? | 0x1ED0301C | 2 | ??? |
| REG_DSP_PORT<0-2> | 0x1ED03020 | 3*8=0x18 |
REG_DSP_STATUS
bit1,8: FIFO WRITE ERRORS?
bit6: FIFO_READ_READY
bit7: FIFO_WRITE_READY
bit9: ???
bit10-12: PORT<0-2>_RECV_READY
bit13-15: PORT<0-2>_SEND_READY
0x1EC03400
The channel registers are based at 0x1EC03400(process virtual address). There's 0x20-bytes total for each channel slot, thus the base-address for a channel's slot is determined with: 0x1EC03400 + (channel_index*0x20). The below offsets are relative to these channel register slots.
| Relative offset | Size | Description |
|---|---|---|
| 0x0 | 2 | REG_CSNDCHANX_CNT. For Type0 Cmd 0xE, CSND module basically writes this value here: u16 (cmdword[2] & 0xFFFF). |
| 0x2 | 2 | For Type0 Cmd 0xE, CSND module writes this value here: 0 - (cmdword[2]>>16). |
| 0x4 | 2 | For Type0 Cmd 0xE, CSND module writes value 0 here. |
| 0x6 | 2 | For Type0 Cmd 0xE, CSND module writes value 0 here. |
| 0x8 | 2 | For Type0 Cmd 0xE, CSND module writes this value here: (u16)cmdword[4]. |
| 0xA | 2 | For Type0 Cmd 0xE, CSND module writes this value here: cmdword[4]>>16. |
| 0xC | 4 | This is the audio data physical address, for the main channel. |
| 0x10 | 4 | This is the audio data total byte-size. The CSND module masks the size loaded from the Type0 command-data with value 0x7FFFFFF, which is then used when writing these registers. |
| 0x14 | 4 | This is the audio data physical address, for the second channel. When this is not 0x0 stereo audio is used, otherwise mono audio is used. |
| 0x18 | 4 | When CSND module handles type0 Cmd 0xE with encoding!=IMA-ADPCM, CSND module sets this to zero. This register can be initialized via CSND module type0 Cmd 0xB. |
| 0x1C | 4 | CSND module writes value zero here immediately after it writes to chanslotreg+0x18. |