Registers
| Old3DS | Name | Address | Width | Used by |
|---|---|---|---|---|
| Yes | PXI_SYNC9 | 0x10008000 | 4 | |
| Yes | PXI_CNT9 | 0x10008004 | 2 | |
| Yes | PXI_SEND9 | 0x10008008 | 4 | |
| Yes | PXI_RECV9 | 0x1000800C | 4 | |
| Yes | PXI_SYNC11 | 0x10163000 | 4 | |
| Yes | PXI_CNT11 | 0x10163004 | 2 | |
| Yes | PXI_SEND11 | 0x10163008 | 4 | |
| Yes | PXI_RECV11 | 0x1016300C | 4 |
The PXI registers are similar to those on DS.
PXI_SYNC
| Bit | RW | Description |
|---|---|---|
| 0-7 | R | Data received from remote bits 8-15 (unrelated to SEND/RECV FIFOs) |
| 8-15 | R/W | Data sent to remote bits 0-7 |
| 23 | ? | ? |
| 29 | W? | Trigger PXI_SYNC11 IRQ (if enabled) |
| 30 | W? | Trigger PXI_SYNC9 IRQ (if enabled) |
| 31 | RW | PXI_SYNC IRQ enable (for local processor) |
This can also be accessed as 4 u8 registers.
PXI_CNT
| Bit | RW | Description |
|---|---|---|
| 0 | R | Send Fifo Empty Status (0=Not Empty, 1=Empty) |
| 1 | R | Send Fifo Full Status (0=Not Full, 1=Full) |
| 2 | R/W | Send Fifo Empty IRQ (0=Disable, 1=Enable) |
| 3 | W | Send Fifo Clear (0=Nothing, 1=Flush Send Fifo) |
| 8 | R | Receive Fifo Empty (0=Not Empty, 1=Empty) |
| 9 | R | Receive Fifo Full (0=Not Full, 1=Full) |
| 10 | R/W | Receive Fifo Not Empty IRQ (0=Disable, 1=Enable) |
| 14 | R/W | Error, Read Empty/Send Full (0=No Error, 1=Error/Acknowledge) |
| 15 | R/W | Enable Send/Receive Fifo (0=Disable, 1=Enable) |