diff --git a/assets/Amiga2000.png b/assets/Amiga2000.png
new file mode 100644
index 0000000..200800f
Binary files /dev/null and b/assets/Amiga2000.png differ
diff --git a/shared/tools.mk b/shared/tools.mk
new file mode 100644
index 0000000..b5db461
--- /dev/null
+++ b/shared/tools.mk
@@ -0,0 +1,24 @@
+WARN_ERROR=-Werror
+HOST_WARNINGS=$(WARN_ERROR) -pedantic-errors -Wfatal-errors -Wall  -Wextra -Wno-unused-parameter -Wshadow -limagequant
+HOST_CFLAGS=$(HOST_WARNINGS) -O3 $(EXTRA_CFLAGS)
+
+$(PROGRAM): out bin $(OBJS) 
+	gcc $(OBJS) -o $(PROGRAM) $(LIBS)
+
+-include $(OBJS:.o=.d)
+
+out/%.o: %.c
+	gcc -c $(HOST_CFLAGS) $< -o $@ 
+	@gcc -MM $(HOST_CFLAGS) $*.c > out/$*.d
+	@mv -f out/$*.d out/$*.d.tmp
+	@sed  's/^.*\:/out\/&/' < out/$*.d.tmp > out/$*.d
+	@rm -f out/$*.d.tmp
+
+out:
+	mkdir out
+
+bin:
+	mkdir bin
+
+clean:
+	rm -rf out bin *~
diff --git a/tools/imagecon/Makefile b/tools/imagecon/Makefile
index fcff735..6fd8355 100644
--- a/tools/imagecon/Makefile
+++ b/tools/imagecon/Makefile
@@ -1,8 +1,5 @@
-IMAGECON=./out/imagecon
+PROGRAM=./out/imagecon
 OBJS=out/imagecon.o out/png.o out/color.o out/dither.o out/ham.o out/palette.o out/file.o out/sliced_ham.o out/quant.o out/utils.o
-WARN_ERROR=-Werror
-HOST_WARNINGS=$(WARN_ERROR) -pedantic-errors -Wfatal-errors -Wall  -Wextra -Wno-unused-parameter -Wshadow -limagequant
-HOST_CFLAGS=$(HOST_WARNINGS) -O3
 LIBS=-lpng -limagequant
 
 # test stuff
@@ -30,47 +27,31 @@ DITHERED_HAM_IMAGE=../../assets/gigi.png
 DITHERED_HAM_BASE=out/dithered_ham
 REFERENCE_DITHERED_HAM_BASE=reference/dithered_ham
 
-$(IMAGECON): out bin $(OBJS) 
-	gcc $(OBJS) -o $(IMAGECON) $(LIBS)
-
--include $(OBJS:.o=.d)
-
-out/%.o: %.c
-	gcc -c $(HOST_CFLAGS) $< -o $@ 
-	@gcc -MM $(HOST_CFLAGS) $*.c > out/$*.d
-	@mv -f out/$*.d out/$*.d.tmp
-	@sed  's/^.*\:/out\/&/' < out/$*.d.tmp > out/$*.d
-	@rm -f out/$*.d.tmp
-
-out:
-	mkdir out
-
-bin:
-	mkdir bin
+include ../../shared/tools.mk
 
 $(USED_PALETTE): $(SHARED_PALETTE)
 	@echo "testing use-palette"
-	$(IMAGECON) --input $(TEST_IMAGE),$(BOB_IMAGE) --output $(SHARED_BASE) --use-palette $(SHARED_PALETTE) --output-bitplanes --output-copperlist
+	$(PROGRAM) --input $(TEST_IMAGE),$(BOB_IMAGE) --output $(SHARED_BASE) --use-palette $(SHARED_PALETTE) --output-bitplanes --output-copperlist
 
-$(SHARED_PALETTE): $(IMAGECON)
+$(SHARED_PALETTE): $(PROGRAM)
 	-rm -f $(SHARED_PALETTE)
-	$(IMAGECON) --input $(TEST_IMAGE),$(BOB_IMAGE) --output $(SHARED_BASE) --colors 32 --quantize --output-palette
+	$(PROGRAM) --input $(TEST_IMAGE),$(BOB_IMAGE) --output $(SHARED_BASE) --colors 32 --quantize --output-palette
 
-$(OUTPUT_BASE).bin: $(IMAGECON) 
+$(OUTPUT_BASE).bin: $(PROGRAM) 
 	-rm -f $(OUTPUT_BASE).bin $(OUTPUT_BASE)-copper-list.s $(OUTPUT_BASE)-palette.s 
-	$(IMAGECON) --input $(TEST_IMAGE) --output $(OUTPUT_BASE) --output-copperlist --output-bitplanes --output-grey-palette --output-palette-asm --colors 32 --quantize
-	$(IMAGECON) --input $(BOB_IMAGE) --output $(BOB_BASE) --output-mask --colors 32 --quantize
+	$(PROGRAM) --input $(TEST_IMAGE) --output $(OUTPUT_BASE) --output-copperlist --output-bitplanes --output-grey-palette --output-palette-asm --colors 32 --quantize
+	$(PROGRAM) --input $(BOB_IMAGE) --output $(BOB_BASE) --output-mask --colors 32 --quantize
 
 $(EHB_BASE).bin: $(EHB_IMAGE)
-	$(IMAGECON) --input $(EHB_IMAGE) --output $(EHB_BASE) --output-bitplanes --colors 32 --quantize --extra-half-brite --output-copperlist
+	$(PROGRAM) --input $(EHB_IMAGE) --output $(EHB_BASE) --output-bitplanes --colors 32 --quantize --extra-half-brite --output-copperlist
 
 $(HAM_BASE).bin: $(HAM_IMAGE)
-	$(IMAGECON) --input $(HAM_IMAGE) --output $(HAM_BASE) --output-bitplanes --ham --output-palette-asm
+	$(PROGRAM) --input $(HAM_IMAGE) --output $(HAM_BASE) --output-bitplanes --ham --output-palette-asm
 
 $(DITHERED_HAM_BASE).bin: $(DITHERED_HAM_IMAGE)
-	$(IMAGECON) --input $(DITHERED_HAM_IMAGE) --output $(DITHERED_HAM_BASE) --dither --output-bitplanes --ham --output-palette-asm
+	$(PROGRAM) --input $(DITHERED_HAM_IMAGE) --output $(DITHERED_HAM_BASE) --dither --output-bitplanes --ham --output-palette-asm
 
-test: $(IMAGECON) $(OUTPUT_BASE).bin $(SHARED_PALETTE) $(USED_PALETTE) $(EHB_BASE).bin $(HAM_BASE).bin $(DITHERED_HAM_BASE).bin
+test: $(PROGRAM) $(OUTPUT_BASE).bin $(SHARED_PALETTE) $(USED_PALETTE) $(EHB_BASE).bin $(HAM_BASE).bin $(DITHERED_HAM_BASE).bin
 	diff $(OUTPUT_BASE).bin $(REFERENCE_BASE).bin	
 	diff $(OUTPUT_BASE)-copper-list.s $(REFERENCE_BASE)-copper-list.s
 	diff $(OUTPUT_BASE)-palette.s $(REFERENCE_BASE)-palette.s
@@ -92,6 +73,3 @@ test: $(IMAGECON) $(OUTPUT_BASE).bin $(SHARED_PALETTE) $(USED_PALETTE) $(EHB_BAS
 	@echo "|  __/|  _  | \`--. \\\`--. \  __|| | | | "
 	@echo "| |   | | | |/\__/ /\__/ / |___| |/ /  "
 	@echo "\_|   \_| |_/\____/\____/\____/|___/   "
-
-clean:
-	rm -rf out bin *~
\ No newline at end of file
diff --git a/tools/makeadf/Makefile b/tools/makeadf/Makefile
index 6bade6c..83b2e1d 100644
--- a/tools/makeadf/Makefile
+++ b/tools/makeadf/Makefile
@@ -1,22 +1,10 @@
-MAKEADF=./out/makeadf
-SRCS=makeadf.c
-HOST_WARNINGS=-pedantic-errors -Wfatal-errors -Wall -Werror -Wextra -Wno-unused-parameter -Wshadow
-HOST_CFLAGS=$(HOST_WARNINGS)
+PROGRAM=./out/makeadf
+OBJS=./out/makeadf.o
 
-$(MAKEADF): out bin $(SRCS)
-	gcc $(HOST_CFLAGS) $(SRCS) -o $(MAKEADF)
+include ../../shared/tools.mk
 
-out:
-	mkdir out
-
-bin:
-	mkdir bin
-
-clean:
-	rm -r out bin *~
-
-test: $(MAKEADF)
-	$(MAKEADF) reference/bootblock.bin > out/test.adf
+test: $(PROGRAM)
+	$(PROGRAM) reference/bootblock.bin > out/test.adf
 	diff reference/test.adf out/test.adf
 	@echo "______  ___   _____ _____ ___________  "
 	@echo "| ___ \/ _ \ /  ___/  ___|  ___|  _  \ "
diff --git a/tools/resize/Makefile b/tools/resize/Makefile
index 6b33283..7e3efdb 100644
--- a/tools/resize/Makefile
+++ b/tools/resize/Makefile
@@ -1,9 +1,9 @@
 PROGRAM=./out/resize
 OBJS=out/resize.o
-WARN_ERROR=-Werror
-HOST_WARNINGS=$(WARN_ERROR) -pedantic-errors -Wfatal-errors -Wall  -Wextra -Wno-unused-parameter -Wshadow -limagequant
-HOST_CFLAGS=$(HOST_WARNINGS) -O3 `GraphicsMagick-config --cppflags`
 LIBS=`GraphicsMagick-config --ldflags --libs`
+EXTRA_CFLAGS=`GraphicsMagick-config --cppflags`
+
+include ../../shared/tools.mk
 
 TEST_IMAGE=../../assets/gigi_full.png
 RESIZED_IMAGE=out/gigi.png
@@ -11,36 +11,31 @@ RESIZED_LACED=out/gigi_laced.png
 REFERENCE_IMAGE=reference/gigi.png
 REFERENCE_LACED=reference/gigi_laced.png
 
-$(PROGRAM): out bin $(OBJS) 
-	gcc $(OBJS) -o $(PROGRAM) $(LIBS)
+TEST_IMAGE2=../../assets/Amiga2000.png
+RESIZED_IMAGE2=out/Amiga2000.png
+REFERENCE_IMAGE2=reference/Amiga2000.png
+RESIZED_LACED2=out/Amiga2000_laced.png
+REFERENCE_LACED2=reference/Amiga2000_laced.png
 
--include $(OBJS:.o=.d)
 
-out/%.o: %.c
-	gcc -c $(HOST_CFLAGS) $< -o $@ 
-	@gcc -MM $(HOST_CFLAGS) $*.c > out/$*.d
-	@mv -f out/$*.d out/$*.d.tmp
-	@sed  's/^.*\:/out\/&/' < out/$*.d.tmp > out/$*.d
-	@rm -f out/$*.d.tmp
-
-out:
-	mkdir out
-
-bin:
-	mkdir bin
-
-clean:
-	rm -rf out bin *~
 
 $(RESIZED_IMAGE): $(TEST_IMAGE) $(PROGRAM) Makefile
 	$(PROGRAM) --width=320 --height=256 --blur=0.75 --input=$(TEST_IMAGE) --output=$(RESIZED_IMAGE)
 
+$(RESIZED_IMAGE2): $(TEST_IMAGE2) $(PROGRAM) Makefile
+	$(PROGRAM) --width=320 --height=256 --blur=0.75 --input=$(TEST_IMAGE2) --output=$(RESIZED_IMAGE2)
+
 $(RESIZED_LACED): $(TEST_IMAGE) $(PROGRAM) Makefile
 	$(PROGRAM) --width=320 --height=512 --interlaced --blur=0.75 --input=$(TEST_IMAGE) --output=$(RESIZED_LACED)
 
-test: $(RESIZED_IMAGE) $(RESIZED_LACED)
+$(RESIZED_LACED2): $(TEST_IMAGE2) $(PROGRAM) Makefile
+	$(PROGRAM) --width=320 --height=512 --interlaced --blur=0.75 --input=$(TEST_IMAGE2) --output=$(RESIZED_LACED2)
+
+test: $(RESIZED_IMAGE) $(RESIZED_LACED) $(RESIZED_IMAGE2) $(RESIZED_LACED2)
 	diff $(RESIZED_IMAGE) $(REFERENCE_IMAGE)
 	diff $(RESIZED_LACED) $(REFERENCE_LACED)
+	diff $(RESIZED_IMAGE2) $(REFERENCE_IMAGE2)
+	diff $(RESIZED_LACED2) $(REFERENCE_LACED2)
 	@echo "______  ___   _____ _____ ___________  "
 	@echo "| ___ \/ _ \ /  ___/  ___|  ___|  _  \ "
 	@echo "| |_/ / /_\ \\\\\ \`--.\ \`--.| |__ | | | | "