Documented SPU Channels
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List of channels
| Channel Name | Number (hex) | Notes |
|---|---|---|
| SPU Write Outbound Interrupt Mailbox | 0x1E | |
| SPU Read Inbound Mailbox | 0x1D | |
| SPU Write Outbound Mailbox | 0x1C | |
| MFC Read Atomic Command Status | 0x1B | |
| MFC Write List Stall-and-Notify Tag Acknowledgment | 0x1A | |
| MFC Read List Stall-and-Notify Tag Status | 0x19 | |
| MFC Read Tag Group Status | 0x18 | |
| MFC Write Tag Status Update Request | 0x17 | |
| MFC Write Tag Group Query Mask | 0x16 | |
| MFC Command Opcode | 0x15 | lower 16 bits |
| MFC Class ID | 0x15 | upper 16 bits |
| MFC Tag ID | 0x14 | |
| MFC Transfer Size or List Size | 0x13 | |
| MFC Effective Address Low or List Address | 0x12 | |
| MFC Effective Address High | 0x11 | |
| MFC LS Address | 0x10 | |
| SPU Read State Save-and-Restore | 0xF | |
| SPU Write State Save-and-Restore | 0xE | |
| SPU Read Machine Status | 0xD | |
| MFC Read Tag Group Query Mask Channel | 0xC | |
| SPU Read Decrementer | 0x8 | |
| SPU Write Decrementer | 0x7 | |
| SPU Signal Notification 2 | 0x4 | |
| SPU Signal Notification 1 | 0x3 |