Registers
| Old3DS | Name | Address | Width | Used by |
|---|---|---|---|---|
| Yes | REG_SPICARDCNT | 0x1000D800 | 4 | |
| Yes | REG_SPICARDASSERT | 0x1000D804 | 4 | |
| Yes | REG_SPICARDSIZE | 0x1000D808 | 4 | |
| Yes | REG_SPICARDFIFO | 0x1000D80C | 4 | |
| Yes | REG_SPICARDFIFOSTAT | 0x1000D810 | 4 | |
| Yes | ? | 0x1000D814 | 4 | |
| Yes | ? | 0x1000D818 | 4 | |
| Yes | ? | 0x1000D81C | 4 |
REG_SPICARDCNT
| BIT | DESCRIPTION |
|---|---|
| 5-0 | Baud Rate |
| 12 | Bus Mode |
| 13 | Transfer Mode (0 = read, 1 = write) |
| 15 | Trigger (0 = idle, 1 = busy) |
REG_SPICARDCNT
When deasserting the card, this registers is set to 0. Presumably contains 1 when the card is asserted.
REG_SPICARDSIZE
| BIT | DESCRIPTION |
|---|---|
| 31-0 | Transfer size |
REG_SPICARDFIFO
| BIT | DESCRIPTION |
|---|---|
| 31-0 | Data |
REG_SPICARDFIFOSTAT
| BIT | DESCRIPTION |
|---|---|
| 0 | FIFO Full (0 = not full, 1 = full) |