Added top level Makefile to create target specific .zip files.

.gitignore

@@ -8,5 +8,6 @@
 *.d64
 *.dsk
 *.atr
+*.zip
 *.obj
 *.exe

Makefile

@@ -0,0 +1,49 @@
+all: c64 apple2 atari
+
+ifeq ($(shell echo),)
+  NULLDEV = /dev/null
+else
+  NULLDEV = nul:
+endif
+
+ZIPCOMMENT := $(shell git rev-parse --short HEAD 2>$(NULLDEV))
+ifeq ($(words $(ZIPCOMMENT)),1)
+  ZIPCOMMENT := https://github.com/cc65/ip65/commit/$(ZIPCOMMENT)
+else
+  ZIPCOMMENT := N/A
+endif
+
+%.zip:
+	zip $@ $^
+	echo $(ZIPCOMMENT) | zip -z $@
+
+c64: ip65-c64.zip
+
+apple2: ip65-apple2.zip
+
+atari: ip65-atari.zip
+
+ip65-c64.zip:    ip65.h ip65.lib ip65_tcp.lib ip65_c64.lib                    ip65.d64
+
+ip65-apple2.zip: ip65.h ip65.lib ip65_tcp.lib ip65_apple2.lib                 ip65.dsk
+
+ip65-atari.zip:  ip65.h ip65.lib ip65_tcp.lib ip65_atari.lib ip65_atarixl.lib ip65.atr
+
+ip65.h:
+	cp inc/$@ $@
+
+ip65.lib ip65_tcp.lib:
+	make -C ip65 $@
+	cp ip65/$@ $@
+
+ip65_c64.lib ip65_apple2.lib ip65_atari.lib ip65_atarixl.lib:
+	make -C drivers $@
+	cp drivers/$@ $@
+
+ip65.%:
+	make -C apps $@
+	cp apps/$@ $@
+
+clean:
+	make -C apps clean
+	-rm -f *.h *.lib *.d64 *.dsk *.atr *.zip