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This page describes the format of the [[HID_Services|HID]] shared memory.
This page describes the format of the [[HID_Services|HID]] shared memory.
The data for each of the below entries(PAD state, circle-pad, touch-screen, etc) is originally read by the HID module at different times per frame.
The data for each of the below entries(PAD state, circle-pad, touch-screen, etc) is originally written by the HID module at different times per frame.
size: 0x2b0 (FIRM 4.4)
size: 0x2b0 (FIRM 4.4)
|-
|-
! Relative offset
! Relative offset
! Size
! Description
! Description
|-
|-
| 0x1C
| 0x1C
| 0x4
| [[PAD]] state. Bit set = button pressed, bit clear = button not pressed. Bit28-31 do not apply to this entry, but they apply to further PAD state entries. Bit28-31 are set when the corresponding circle pad coordinate is >=41 (or <=-41).
| [[PAD]] state. Bit set = button pressed, bit clear = button not pressed. Bit28-31 do not apply to this entry, but they apply to further PAD state entries. Bit28-31 are set when the corresponding circle pad coordinate is >=41 (or <=-41).
|-
|-
| 0x28
| 0x28
| 0x4
| Second PAD state entry.
| Second PAD state entry.
|-
|-
| 0x34
| 0x34
| 0x4
| This stores circle-pad info: the low s16 is the X coordinate, the high s16 is the Y coordinate. The circle-pad center is ~0 for these fields. The range for these fields is approximately: -0x9C(bottom/left) - 0x9C(top/right).
| This stores circle-pad info: the low s16 is the X coordinate, the high s16 is the Y coordinate. The circle-pad center is ~0 for these fields. The range for these fields is approximately: -0x9C(bottom/left) - 0x9C(top/right).
|-
|-
| 0x38
| 0x38
| 0x4
| Third PAD state entry.
| Third PAD state entry.
|-
|-
| 0x44
| 0x44
| 0x4
| Second circle-pad info entry.
| Second circle-pad info entry.
|-
|-
| 0x48
| 0x48
| 0x4
| Fourth PAD state entry.
| Fourth PAD state entry.
|-
|-
| 0x54
| 0x54
| 0x4
| Third circle-pad info entry.
| Third circle-pad info entry.
|-
|-
| 0x58
| 0x58
| 0x4
| Fifth PAD state entry.
| Fifth PAD state entry.
|-
|-
| 0x64
| 0x64
| 0x4
| Fourth circle-pad info entry.
| Fourth circle-pad info entry.
|-
|-
| 0x68
| 0x68
| 0x4
| Sixth PAD state entry.
| Sixth PAD state entry.
|-
|-
| 0x74
| 0x74
| 0x4
| Fifth circle-pad info entry.
| Fifth circle-pad info entry.
|-
|-
| 0x78
| 0x78
| 0x4
| Seventh PAD state entry.
| Seventh PAD state entry.
|-
|-
| 0x84
| 0x84
| 0x4
| Sixth circle-pad info entry.
| Sixth circle-pad info entry.
|-
|-
| 0x88
| 0x88
| 0x4
| Eighth PAD state entry.
| Eighth PAD state entry.
|-
|-
| 0x94
| 0x94
| 0x4
| Seventh circle-pad info entry.
| Seventh circle-pad info entry.
|-
|-
| 0x98
| 0x98
| 0x4
| Ninth PAD state entry.
| Ninth PAD state entry.
|-
|-
| 0xA4
| 0xA4
| 0x4
| Eighth circle-pad info entry.
| Eighth circle-pad info entry.
|}
=Offset 0xA8=
{| class="wikitable" border="1"
|-
|-
| 0xB8
! Relative offset
| first used entry number in the touch-screen position info buffer?
! Size
! Description
|-
| 0x10
| 0x4
| Index in the array at +0x20 which was last updated by HID module.
|-
| 0x18
| 0x8
| Touch-screen entry, which seems to contain raw coordinate data prior to being converted to pixel coordinates.
|-
| 0x20
| 0x40
| 8 touch-screen entries, containing pixel coordinates.
|}
|}
This 0x60-byte region stores state for touch-screen related info. Each touch-screen entry is all-zero when the touch-screen is not being touched.
This 0x48-byte region stores entries for touch-screen position info. Each entry is 0x8-bytes, there's a total of 9 entries. When the touch-screen is not being touched, this region is all-zero.
HID module first updates index0, then index1, and so on. When updating the array when the index is already 7, the index is reset to 0.
==Entry format==
==Entry format==
| The u8 at +0 here is 0x0 when this entry doesn't contain any actual data, value 0x1 indicates that this entry contains actual data.
| The u8 at +0 here is 0x0 when this entry doesn't contain any actual data, value 0x1 indicates that this entry contains actual data.
|}
|}
=Offset 0x108=
The size of this region is 0x50-bytes. This probably contains the gyroscope and/or accelerometer state?
=Offset 0x158=
The size of this region is 0xE0-bytes. Unknown, contains 0xFF/0x00 bytes?
=Offset 0x238=
The size of this region is 0x78-bytes. Unknown, contains 0xFF/0x00 bytes?