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/windows.md

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+[← Home](../README.md) · [Intuition](README.md)
+
+# Windows — OpenWindow, IDCMP, WA_ Tags
+
+## Overview
+
+A **Window** is a rectangular region on a Screen where an application renders and receives input. Windows are managed by Intuition and provide title bars, borders, close/zoom/depth gadgets, sizing, and IDCMP message delivery.
+
+---
+
+## Opening a Window (OS 2.0+)
+
+```c
+struct Window *win = OpenWindowTags(NULL,
+    WA_Left,        50,
+    WA_Top,         30,
+    WA_Width,       400,
+    WA_Height,      200,
+    WA_Title,       "My Window",
+    WA_Flags,       WFLG_CLOSEGADGET | WFLG_DRAGBAR | WFLG_DEPTHGADGET |
+                    WFLG_SIZEGADGET | WFLG_ACTIVATE | WFLG_GIMMEZEROZERO,
+    WA_IDCMP,       IDCMP_CLOSEWINDOW | IDCMP_MOUSEBUTTONS | IDCMP_VANILLAKEY,
+    WA_CustomScreen, myScreen,
+    TAG_DONE);
+```
+
+### Common WA_ Tags
+
+| Tag | Description |
+|---|---|
+| `WA_Left`, `WA_Top` | Position |
+| `WA_Width`, `WA_Height` | Size |
+| `WA_MinWidth`, `WA_MaxWidth` | Size limits |
+| `WA_Title` | Window title string |
+| `WA_Flags` | `WFLG_*` flags |
+| `WA_IDCMP` | IDCMP class mask |
+| `WA_CustomScreen` | Screen to open on |
+| `WA_PubScreen` | Public screen to open on |
+| `WA_SuperBitMap` | Use super-bitmap scrolling |
+| `WA_Gadgets` | First gadget in chain |
+| `WA_Checkmark` | Custom checkmark image |
+| `WA_Borderless` | No borders |
+
+---
+
+## Window Flags (`WFLG_*`)
+
+```c
+#define WFLG_SIZEGADGET    (1<<0)
+#define WFLG_DRAGBAR       (1<<1)
+#define WFLG_DEPTHGADGET   (1<<2)
+#define WFLG_CLOSEGADGET   (1<<3)
+#define WFLG_SIZEBRIGHT    (1<<4)   /* right-side sizing */
+#define WFLG_SIZEBBOTTOM   (1<<5)
+#define WFLG_SMART_REFRESH (0)       /* refresh type */
+#define WFLG_SIMPLE_REFRESH (1<<6)
+#define WFLG_SUPER_BITMAP  (1<<7)
+#define WFLG_BACKDROP      (1<<8)
+#define WFLG_REPORTMOUSE   (1<<9)
+#define WFLG_GIMMEZEROZERO (1<<10)   /* inner area starts at 0,0 */
+#define WFLG_BORDERLESS    (1<<11)
+#define WFLG_ACTIVATE      (1<<12)
+#define WFLG_RMBTRAP       (1<<16)   /* trap right-button clicks */
+#define WFLG_NOCAREREFRESH (1<<17)
+```
+
+---
+
+## Event Loop
+
+```c
+BOOL running = TRUE;
+while (running) {
+    WaitPort(win->UserPort);
+    struct IntuiMessage *imsg;
+    while ((imsg = (struct IntuiMessage *)GetMsg(win->UserPort))) {
+        switch (imsg->Class) {
+            case IDCMP_CLOSEWINDOW:
+                running = FALSE;
+                break;
+            case IDCMP_VANILLAKEY:
+                Printf("Key: %lc\n", imsg->Code);
+                break;
+        }
+        ReplyMsg((struct Message *)imsg);
+    }
+}
+CloseWindow(win);
+```
+
+---
+
+## References
+
+- NDK39: `intuition/intuition.h`
+- ADCD 2.1: `OpenWindowTagList`, `CloseWindow`
+- `09_intuition/idcmp.md` — IDCMP message classes