diff --git a/Makefile b/Makefile
index 8e568c8..fb1d9c9 100644
--- a/Makefile
+++ b/Makefile
@@ -2,7 +2,8 @@
 
 export PATH := $(PATH):/home/nick/code/nes/go-fds/bin
 
-all: dasm/disksys.asm \
+all: dasm/ bins/ \
+	 dasm/disksys.asm \
 	 dasm/dk3_file4.asm \
 	 dasm/dk3_file4-post-copy.asm
 
@@ -11,7 +12,10 @@ dasm/dk3_file4-post-copy.asm: bins/dk3_file4.bin dk3_file4-post-copy.cfg labels.
 dasm/disksys.asm: disksys.cfg labels.cfg
 
 clean:
-	-rm dasm/*
+	-rm dasm/* bins/*
+
+%/:
+	mkdir $@
 
 dasm/%.asm: %.cfg.tmp
 	da65 -i $< -o $@
diff --git a/dk3_file4-post-copy.cfg b/dk3_file4-post-copy.cfg
index 45ba86d..df27783 100644
--- a/dk3_file4-post-copy.cfg
+++ b/dk3_file4-post-copy.cfg
@@ -1,7 +1,7 @@
 global {
     cpu "6502";
-    inputname "roms/dk3_file4.bin";
-    startaddr $DC00;
+    inputname "bins/dk3_file4.bin";
+    startaddr $7C00;
     commentcolumn 50;
     comments 3;
 };