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.

12_networking/protocols.md

@@ -0,0 +1,67 @@
+[← Home](../README.md) · [Networking](README.md)
+
+# Protocol Implementation — DHCP, DNS, HTTP
+
+## Overview
+
+With `bsdsocket.library` providing a BSD-compatible API, standard network protocols can be implemented using familiar patterns adapted for the Amiga's single-address-space, library-based architecture.
+
+---
+
+## DNS Resolution
+
+```c
+/* gethostbyname — provided by bsdsocket.library: */
+struct hostent *he = gethostbyname("www.amiga.org");
+if (he) {
+    struct in_addr addr = *(struct in_addr *)he->h_addr;
+    Printf("IP: %s\n", Inet_NtoA(addr.s_addr));
+}
+```
+
+---
+
+## HTTP Client (Minimal)
+
+```c
+LONG sock = socket(AF_INET, SOCK_STREAM, 0);
+struct hostent *he = gethostbyname("www.example.com");
+struct sockaddr_in sa;
+sa.sin_family = AF_INET;
+sa.sin_port   = htons(80);
+CopyMem(he->h_addr, &sa.sin_addr, he->h_length);
+
+connect(sock, (struct sockaddr *)&sa, sizeof(sa));
+
+char req[] = "GET / HTTP/1.0\r\nHost: www.example.com\r\n\r\n";
+send(sock, req, strlen(req), 0);
+
+char buf[8192];
+LONG total = 0, n;
+while ((n = recv(sock, buf + total, sizeof(buf) - total - 1, 0)) > 0)
+    total += n;
+buf[total] = 0;
+Printf("%s\n", buf);
+
+CloseSocket(sock);
+```
+
+---
+
+## DHCP Overview
+
+DHCP on Amiga is typically handled by the TCP/IP stack itself (Roadshow, Miami) or an external client (AmiTCP + `dhclient`). The sequence is standard:
+
+1. `DHCPDISCOVER` — broadcast on port 67
+2. `DHCPOFFER` — server responds with IP offer
+3. `DHCPREQUEST` — client accepts
+4. `DHCPACK` — server confirms; lease begins
+
+For MiSTer/FPGA cores with custom SANA-II drivers, DHCP is handled automatically once the SANA-II driver is online and the stack is configured for `IPTYPE=DHCP`.
+
+---
+
+## References
+
+- `12_networking/bsdsocket.md` — socket API reference
+- `12_networking/tcp_ip_stacks.md` — stack configuration