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.

09_intuition/idcmp.md

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+[← Home](../README.md) · [Intuition](README.md)
+
+# IDCMP — IntuiMessage Classes
+
+## Overview
+
+**IDCMP** (Intuition Direct Communication Message Ports) is the mechanism by which Intuition delivers input events to windows. Each window has a `UserPort` (MsgPort) where `IntuiMessage` structures are queued.
+
+---
+
+## struct IntuiMessage
+
+```c
+/* intuition/intuition.h — NDK39 */
+struct IntuiMessage {
+    struct Message   ExecMessage;
+    ULONG            Class;        /* IDCMP_* class */
+    UWORD            Code;         /* class-specific code */
+    UWORD            Qualifier;    /* key/mouse qualifiers */
+    APTR             IAddress;     /* class-specific address (e.g. gadget) */
+    WORD             MouseX;       /* mouse X relative to window */
+    WORD             MouseY;       /* mouse Y relative to window */
+    ULONG            Seconds;      /* timestamp seconds */
+    ULONG            Micros;       /* timestamp microseconds */
+    struct Window   *IDCMPWindow;  /* window that received this */
+    struct IntuiMessage *SpecialLink;
+};
+```
+
+---
+
+## IDCMP Class Constants
+
+| Constant | Hex | Description |
+|---|---|---|
+| `IDCMP_SIZEVERIFY` | `$0001` | Window is about to be resized |
+| `IDCMP_NEWSIZE` | `$0002` | Window was resized |
+| `IDCMP_REFRESHWINDOW` | `$0004` | Window needs refresh |
+| `IDCMP_MOUSEBUTTONS` | `$0008` | Mouse button pressed/released |
+| `IDCMP_MOUSEMOVE` | `$0010` | Mouse moved (if REPORTMOUSE) |
+| `IDCMP_GADGETDOWN` | `$0020` | Gadget pressed |
+| `IDCMP_GADGETUP` | `$0040` | Gadget released |
+| `IDCMP_REQSET` | `$0080` | Requester activated |
+| `IDCMP_MENUPICK` | `$0100` | Menu item selected |
+| `IDCMP_CLOSEWINDOW` | `$0200` | Close gadget clicked |
+| `IDCMP_RAWKEY` | `$0400` | Raw keyboard event |
+| `IDCMP_REQVERIFY` | `$0800` | Requester about to open |
+| `IDCMP_REQCLEAR` | `$1000` | Requester closed |
+| `IDCMP_MENUVERIFY` | `$2000` | Menu about to open |
+| `IDCMP_NEWPREFS` | `$4000` | Preferences changed |
+| `IDCMP_DISKINSERTED` | `$8000` | Disk inserted |
+| `IDCMP_DISKREMOVED` | `$10000` | Disk removed |
+| `IDCMP_ACTIVEWINDOW` | `$40000` | Window activated |
+| `IDCMP_INACTIVEWINDOW` | `$80000` | Window deactivated |
+| `IDCMP_DELTAMOVE` | `$100000` | Delta mouse movement |
+| `IDCMP_VANILLAKEY` | `$200000` | Translated ASCII keypress |
+| `IDCMP_INTUITICKS` | `$400000` | ~10Hz timer tick |
+| `IDCMP_IDCMPUPDATE` | `$800000` | BOOPSI gadget update |
+| `IDCMP_CHANGEWINDOW` | `$2000000` | Window moved/resized |
+
+---
+
+## Qualifier Flags
+
+| Constant | Hex | Description |
+|---|---|---|
+| `IEQUALIFIER_LSHIFT` | `$0001` | Left Shift |
+| `IEQUALIFIER_RSHIFT` | `$0002` | Right Shift |
+| `IEQUALIFIER_CAPSLOCK` | `$0004` | Caps Lock |
+| `IEQUALIFIER_CONTROL` | `$0008` | Control |
+| `IEQUALIFIER_LALT` | `$0010` | Left Alt |
+| `IEQUALIFIER_RALT` | `$0020` | Right Alt |
+| `IEQUALIFIER_LCOMMAND` | `$0040` | Left Amiga |
+| `IEQUALIFIER_RCOMMAND` | `$0080` | Right Amiga |
+| `IEQUALIFIER_LEFTBUTTON` | `$4000` | LMB |
+| `IEQUALIFIER_MIDBUTTON` | `$1000` | MMB |
+| `IEQUALIFIER_RBUTTON` | `$8000` | RMB (not standard) |
+
+---
+
+## References
+
+- NDK39: `intuition/intuition.h`, `devices/inputevent.h`
+- ADCD 2.1: IDCMP reference