diff --git a/README.md b/README.md
index ec81851..9dde802 100644
--- a/README.md
+++ b/README.md
@@ -25,6 +25,19 @@ system fully up on a PDP-7 system, fix any bugs and document everything.
 We have a [real PDP-7](http://physics.uoregon.edu/outreach/movies/pdplives/)
 and [SimH](http://simh.trailing-edge.com/) as target platforms.
 
+## Running pdp7-unix
+
+You will need [simh](http://simh.trailing-edge.com/) 4.0 to run pdp7-unix.  You can get the source code [here](https://github.com/simh/simh).  To compile it:
+
+`make pdp7`
+
+to run pdp-unix from the pdp7-unix source tree
+
+`make run`
+
+Press `ctl-e` to break out the simulator into simh
+
+
 ## Source Tree
 
 The code in the original scans are (c) Novell who own the rights to the Unix
@@ -37,7 +50,6 @@ source code. Everything that didn't come from the scanned files is GPLv3.
 * /tools     holds the source for the tools written to assist the project
 * /build     is an area to build the kernel & filesystem and run them
 * /misc	     holds miscellaneous notes and information
-* /pdp7parse holds a Java parser for pdp7 source code
 
 ## Travis Status
 
diff --git a/build/Makefile b/build/Makefile
index 288e0f3..ad09828 100644
--- a/build/Makefile
+++ b/build/Makefile
@@ -12,11 +12,12 @@ OTHERSRC=../src/other
 TESTSRC=../src/tests
 BINDIR=../bin
 TESTDIR=../tests
+IMAGEFILE=image.fs
 
-all: cmd others a.rim image.fs
+all: cmd others a.rim image
 
 # Manually make all before make run
-run:
+run: clean all
 	pdp7 unixv0.simh
 
 a.rim:
@@ -27,12 +28,12 @@ coldboot:
 	$(AS) -f rim  -o a.rim $(SYSSRC)/sop.s $(SYSSRC)/s[1-9].s
 	$(AS) -n -f list -o a.lst $(SYSSRC)/sop.s $(SYSSRC)/s[1-9].s
 
-image.fs:
+image:
 	$(MKFS) --format simh proto
-	$(FSCK) image.fs
-	
+	$(FSCK) $(IMAGEFILE)
+
 clean:
-	rm -f a.rim image.fs a.lst n.out
+	rm -f a.rim $(IMAGEFILE) a.lst n.out
 	rm -rf $(BINDIR)
 	rm -rr $(TESTDIR)