IR:RST Shared Memory: Difference between revisions

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Created page with "This page describes the format of the ir:rst's shared memory. It contains the current state of New 3DS input device, ie the c-stick and the ZL/ZR shoulder buttons..."
 
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This page describes the format of the [[IR Services|ir:rst]]'s shared memory. It contains the current state of New 3DS input device, ie the c-stick and the ZL/ZR shoulder buttons.


Size: 0x88 ?
=Offset 0x0=
{| class="wikitable" border="1"
|-
!  Relative offset
!  Size
!  Description
|-
| 0x0
| 0x4
| A counter that ranges from 0 to 7, presumably to indicate which entry was last updated
|-
| 0x4
| 0x4
| Unused ? (value 0x0)
|-
| 0x8
| 0x80
| Array of 8 entries, where each entry (see below) is 0x10-bytes.
|}
IR 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.
==PAD State==
{| class="wikitable" border="1"
|-
!  Bit
!  Description
|-
| 14
| ZL
|-
| 15
| ZR
|-
| 24
| C-stick right
|-
| 25
| C-stick left
|-
| 26
| C-stick up
|-
| 27
| C-stick down
|}
The ir:rst PAD entries are the same format as HID ones and meant to be ORd with them (they are complementary, there is no overlap in used bits).
==Entry format==
{| class="wikitable" border="1"
|-
!  Relative offset
!  Size
!  Description
|-
| 0x0
| 0x4
| Current PAD state.
|-
| 0x4
| 0x4
| PAD state for buttons which were pressed(bitmasks which changed from value 0 to value 1) since the last HID update.
|-
| 0x8
| 0x4
| PAD state for buttons which were released(bitmasks which changed from value 1 to value 0) since the last HID update.
|-
| 0xC
| 0x4
| This stores c-stick info: the low s16 is the X coordinate, the high s16 is the Y coordinate. The c-stick center is exactly 0 for these fields. The range for these fields is approximately: -0x9C(bottom/left) - 0x9C(top/right).
|}

Latest revision as of 02:20, 26 October 2014

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