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.

11_libraries/iffparse.md

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+[← Home](../README.md) · [Libraries](README.md)
+
+# iffparse.library — IFF File Parsing
+
+## Overview
+
+IFF (Interchange File Format) is EA/Commodore's universal container format. `iffparse.library` provides stream-oriented parsing/writing of IFF files. Common IFF types: ILBM (images), 8SVX (audio), ANIM (animation), FTXT (formatted text).
+
+---
+
+## IFF Structure
+
+```
+FORM <size> <type>
+  <chunk_id> <size> <data...>
+  <chunk_id> <size> <data...>
+  ...
+```
+
+All values are big-endian. Chunks are padded to even byte boundaries.
+
+---
+
+## Key Functions
+
+```c
+struct Library *IFFParseBase = OpenLibrary("iffparse.library", 0);
+struct IFFHandle *iff = AllocIFF();
+
+/* Open from file: */
+iff->iff_Stream = (ULONG)Open("image.iff", MODE_OLDFILE);
+InitIFFasDOS(iff);
+OpenIFF(iff, IFFF_READ);
+
+/* Register chunks we want to stop at: */
+StopChunk(iff, ID_ILBM, ID_BMHD);
+StopChunk(iff, ID_ILBM, ID_BODY);
+StopChunk(iff, ID_ILBM, ID_CMAP);
+
+/* Parse: */
+LONG error;
+while ((error = ParseIFF(iff, IFFPARSE_SCAN)) == 0) {
+    struct ContextNode *cn = CurrentChunk(iff);
+    switch (cn->cn_ID) {
+        case ID_BMHD:
+            ReadChunkBytes(iff, &bmhd, sizeof(bmhd));
+            break;
+        case ID_CMAP:
+            ReadChunkBytes(iff, palette, cn->cn_Size);
+            break;
+        case ID_BODY:
+            ReadChunkBytes(iff, bodydata, cn->cn_Size);
+            break;
+    }
+}
+
+CloseIFF(iff);
+Close((BPTR)iff->iff_Stream);
+FreeIFF(iff);
+```
+
+---
+
+## Common Chunk IDs
+
+| FORM Type | Chunk | Description |
+|---|---|---|
+| `ILBM` | `BMHD` | Bitmap header (width, height, depth) |
+| `ILBM` | `CMAP` | Colour map (R,G,B triples) |
+| `ILBM` | `BODY` | Image body data |
+| `ILBM` | `CAMG` | Amiga display mode |
+| `8SVX` | `VHDR` | Voice header |
+| `8SVX` | `BODY` | Audio sample data |
+| `ANIM` | `ANHD` | Animation header |
+| `ANIM` | `DLTA` | Delta frame data |
+
+---
+
+## References
+
+- NDK39: `libraries/iffparse.h`, `datatypes/pictureclass.h`