diff --git a/.travis.yml b/.travis.yml
new file mode 100644
index 0000000..5650818
--- /dev/null
+++ b/.travis.yml
@@ -0,0 +1,11 @@
+sudo: enabled
+os: osx
+language: c
+
+install:
+- git clone https://github.com/cc65/cc65 /tmp/cc65 &&
+  sudo make -C /tmp/cc65 ca65 ld65 avail &&
+  ca65 --version
+
+script:
+  - make
diff --git a/package.sh b/package.sh
index 8e4c7ae..801e525 100755
--- a/package.sh
+++ b/package.sh
@@ -11,7 +11,7 @@ VOLNAME="basys33"
 # Create a new disk image.
 
 rm -f "$IMGFILE"
-cadius CREATEVOLUME "$IMGFILE" "$VOLNAME" 800KB --quiet --no-case-bits
+cadius CREATEVOLUME "$IMGFILE" "$VOLNAME" 140KB --quiet --no-case-bits
 
 cp "basis.system.SYS" "basis.system#FF0000"
 cadius ADDFILE "$IMGFILE" "/$VOLNAME" "basis.system#FF0000" --quiet --no-case-bits