50
edits
Changes
Basic Area Table
The DSP communicates with userland through memory locations 0x1ff40000-0x1ff77fff. Within this region are two areas of structures that are exact duplicates of each other. The DSP alternates between the use of these two areas (much like a double-buffer). Each area has 15 structures within it. The location of these structures can be obtained by reading pipe 2.
The mixer has 24 channels, each of which are individually configurable.
{| class="wikitable"
|-
| Structure Number
| DSP memory address
| Size
| Description
|-
| 5
| 0x8400
| 0x20
| Status (?)
|-
| 9
| 0x8410
| 0x260
| Debug (?)
|-
| 6
| 0x8540
| 0x280
| Loopback Samples (PCM16)
|-
| 2
| 0x8680
| 0x120
| Channel Status (x24)
|-
| 8
| 0x9710
| 0x1A40
| ?
|-
| 4
| 0x9430
| 0xC4
| Main Configuration
|-
| 7
| 0x9492
| 0x1400
| ?
|-
| 1
| 0x9e92
| 0x1200
| Channel Config (x24)
|-
| 3
| 0x9430
| 0x300
| GC-ADPCM Coefficients (x24)|-
|-
| 10
| 0xa912
| 0x200
|
|-
| 11
| 0xaa12
| 0x180
|
|-
| 12
| 0xaad2
| 0x300
|
|-
| 13
| 0xac52
| 0x14
|
|-
| 14
| 0xac5c
| 0x2476
| -
|-
| 0
| 0xbfff
| 0x2
| Frame Counter
|}
The mixer has 24 channels, each of which are individually configurable.
{| class="wikitable"
|-
| Structure Number
| DSP memory address
| Size
| Description
|-
| 5
| 0x8400
| 0x20
| Status (?)
|-
| 9
| 0x8410
| 0x260
| Debug (?)
|-
| 6
| 0x8540
| 0x280
| Loopback Samples (PCM16)
|-
| 2
| 0x8680
| 0x120
| Channel Status (x24)
|-
| 8
| 0x9710
| 0x1A40
| ?
|-
| 4
| 0x9430
| 0xC4
| Main Configuration
|-
| 7
| 0x9492
| 0x1400
| ?
|-
| 1
| 0x9e92
| 0x1200
| Channel Config (x24)
|-
| 3
| 0x9430
| 0x300
| GC-ADPCM Coefficients (x24)|-
|-
| 10
| 0xa912
| 0x200
|
|-
| 11
| 0xaa12
| 0x180
|
|-
| 12
| 0xaad2
| 0x300
|
|-
| 13
| 0xac52
| 0x14
|
|-
| 14
| 0xac5c
| 0x2476
| -
|-
| 0
| 0xbfff
| 0x2
| Frame Counter
|}