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.

13_toolchain/makefiles.md

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+[← Home](../README.md) · [Toolchain](README.md)
+
+# Makefile Patterns for Amiga Cross-Compilation
+
+## Overview
+
+Standard Makefile patterns for building Amiga executables from Linux/macOS using the bebbo cross-toolchain or vasm/vlink.
+
+---
+
+## GCC Cross-Compilation
+
+```makefile
+# Makefile for m68k-amigaos-gcc
+PREFIX  = m68k-amigaos-
+CC      = $(PREFIX)gcc
+AS      = $(PREFIX)as
+LD      = $(PREFIX)gcc
+STRIP   = $(PREFIX)strip
+
+NDK     = /opt/amiga/m68k-amigaos/ndk-include
+
+CFLAGS  = -noixemul -m68000 -Os -fomit-frame-pointer \
+          -I$(NDK) -Wall -Wextra
+LDFLAGS = -noixemul -Wl,--emit-relocs
+LIBS    = -lamiga
+
+TARGET  = myapp
+SRCS    = main.c util.c
+OBJS    = $(SRCS:.c=.o)
+
+all: $(TARGET)
+
+$(TARGET): $(OBJS)
+	$(LD) $(LDFLAGS) -o $@ $^ $(LIBS)
+	$(STRIP) $@
+
+%.o: %.c
+	$(CC) $(CFLAGS) -c -o $@ $<
+
+clean:
+	rm -f $(OBJS) $(TARGET)
+
+.PHONY: all clean
+```
+
+---
+
+## vasm/vlink Assembly Project
+
+```makefile
+VASM  = vasmm68k_mot
+VLINK = vlink
+
+AFLAGS = -Fhunk -m68000 -I/opt/amiga/ndk/Include/include_i
+LFLAGS = -bamigahunk -s
+
+TARGET = myprog
+SRCS   = main.s gfx.s sound.s
+OBJS   = $(SRCS:.s=.o)
+
+all: $(TARGET)
+
+$(TARGET): $(OBJS)
+	$(VLINK) $(LFLAGS) -o $@ $^
+
+%.o: %.s
+	$(VASM) $(AFLAGS) -o $@ $<
+
+clean:
+	rm -f $(OBJS) $(TARGET)
+```
+
+---
+
+## Mixed C + Assembly
+
+```makefile
+CC   = m68k-amigaos-gcc
+VASM = vasmm68k_mot
+
+%.o: %.c
+	$(CC) $(CFLAGS) -c -o $@ $<
+
+%.o: %.s
+	$(VASM) -Fhunk -m68000 -o $@ $<
+
+myapp: main.o fastblit.o
+	$(CC) $(LDFLAGS) -o $@ $^ $(LIBS)
+```
+
+---
+
+## References
+
+- `13_toolchain/gcc_amiga.md` — GCC setup
+- `13_toolchain/vasm_vlink.md` — vasm/vlink setup