amiga-bootcamp/10_devices/input.md

[← Home](../README.md) · [Devices](README.md)

# input.device — Event Stream Merging

## Overview

`input.device` merges events from keyboard, mouse, gameport, and timer into a single input stream that feeds Intuition. Input handlers can be installed at various priorities to filter, modify, or consume events.

---

## Handler Priority Levels

| Priority | Consumer |
|---|---|
| 100 | System reserved |
| 51+ | Custom high-priority handlers |
| 50 | Intuition |
| 20 | Console.device |
| 0 | Default |

---

## Commands

| Code | Constant | Description |
|---|---|---|
| 9 | `IND_ADDHANDLER` | Add input handler |
| 10 | `IND_REMHANDLER` | Remove input handler |
| 11 | `IND_WRITEEVENT` | Inject an InputEvent into the stream |
| 12 | `IND_SETTHRESH` | Set double-click threshold |
| 13 | `IND_SETPERIOD` | Set key repeat period |
| 14 | `IND_SETMPORT` | Set mouse port type |
| 15 | `IND_SETMTRIG` | Set mouse trigger |
| 16 | `IND_SETMTYPE` | Set mouse type |

---

## References

- NDK39: `devices/input.h`
- [input_events.md](../09_intuition/input_events.md) — handler installation example
docs(amiga): complete AmigaOS 3.1/3.2 developer reference — 172 files across 17 sections Comprehensive technical documentation covering: - Hardware: OCS/ECS/AGA custom chip registers, Copper & Blitter deep dives - Boot sequence: cold boot through startup-sequence - Binary format: HUNK executable spec, relocation, debug info - Linking & ABI: .fd files, LVO tables, register calling conventions - Exec kernel: tasks, interrupts, memory, signals, semaphores - AmigaDOS: file I/O, FFS/OFS layout, CLI/Shell scripting - Graphics: planar bitmaps, Copper programming, HAM/EHB modes - Intuition: screens, windows, IDCMP, BOOPSI - Devices: trackdisk, SCSI, serial, timer, audio, keyboard - Libraries: utility, expansion, IFFParse, locale, ARexx - Networking: bsdsocket API, SANA-II, TCP/IP stack comparison - Toolchain: GCC, vasm/vlink, SAS/C, NDK, debugging - Reverse engineering: IDA/Ghidra setup, compiler fingerprints, case studies - CPU & MMU: 68040/060 emulation libs, PMMU, cache management - Driver development: SANA-II, Picasso96/RTG, AHI audio All files include breadcrumb navigation. No local paths or proprietary content. 2026-04-23 12:16:52 -04:00			`[← Home](../README.md) · [Devices](README.md)`

			`# input.device — Event Stream Merging`

			`## Overview`

			`input.device` merges events from keyboard, mouse, gameport, and timer into a single input stream that feeds Intuition. Input handlers can be installed at various priorities to filter, modify, or consume events.

			`---`

			`## Handler Priority Levels`

			`\| Priority \| Consumer \|`
			`\|---\|---\|`
			`\| 100 \| System reserved \|`
			`\| 51+ \| Custom high-priority handlers \|`
			`\| 50 \| Intuition \|`
			`\| 20 \| Console.device \|`
			`\| 0 \| Default \|`

			`---`

			`## Commands`

			`\| Code \| Constant \| Description \|`
			`\|---\|---\|---\|`
			\| 9 \| `IND_ADDHANDLER` \| Add input handler \|
			\| 10 \| `IND_REMHANDLER` \| Remove input handler \|
			\| 11 \| `IND_WRITEEVENT` \| Inject an InputEvent into the stream \|
			\| 12 \| `IND_SETTHRESH` \| Set double-click threshold \|
			\| 13 \| `IND_SETPERIOD` \| Set key repeat period \|
			\| 14 \| `IND_SETMPORT` \| Set mouse port type \|
			\| 15 \| `IND_SETMTRIG` \| Set mouse trigger \|
			\| 16 \| `IND_SETMTYPE` \| Set mouse type \|

			`---`

			`## References`

			- NDK39: `devices/input.h`
docs(amiga): make cross-references clickable markdown links Convert bare .md path references in 29 files to proper [name](relative/path) markdown links for GitHub navigation. 2026-04-23 12:24:21 -04:00			`- [input_events.md](../09_intuition/input_events.md) — handler installation example`