Registers
| Old3DS | Name | Address | Width | Used by |
|---|---|---|---|---|
| Yes | SHA_CNT | 0x1000A000 | 4 | Boot9, Process9 |
| Yes | SHA_INPUTSZ | 0x1000A004 | 4 | Process9 |
| Yes | SHA_OUT | 0x1000A040 | 0x20 | Process9 |
| Yes | SHA_IN | 0x1000A080 | 0x40 | Boot9, Process9 |
SHA_CNT
| Bits | Description |
|---|---|
| 0-1 | 0=Hash ready, 1=Normal, 2=Final Round |
| 3 | Endianess (0=Little endian, 1=Big endian) |
| 4 | ? Input related. Changes the hash completely |
| 5 | Mode (0=SHA256, 1=SHA1) |
| 8 | Unknown. When set, the *entire* ARM9 hangs/crashes when attempting to read REG_SHA_IN. |
| 24 | Enable |
| 25 | 1 when FIFO expects read/write |
SHA_INPUTSZ
This reg contains the total size of the data written to REG_SHA_IN.
SHA_OUT
This reg contains the SHA* hash after the final round.
SHA_IN
The data to be hashed must be written here. The data must be padded with 0x00s to align with the register size (if needed).