diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..ce49713
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,8 @@
+# Build directory
+out
+
+# Directory mounted in Virtual ][ as a ProDOS volume
+mount
+
+# OS-specific files
+.DS_Store
diff --git a/Makefile b/Makefile
index 8d8087f..b5dd72a 100644
--- a/Makefile
+++ b/Makefile
@@ -7,7 +7,7 @@ OUTDIR = out
 
 HEADERS = $(wildcard inc/*.inc)
 
-TARGETS = $(OUTDIR)/ram.system.SYS
+TARGETS = $(OUTDIR)/ram.drv.system.SYS
 
 .PHONY: clean all
 all: $(OUTDIR) $(TARGETS)
diff --git a/README.md b/README.md
index 7e34657..f0646db 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,7 @@
 # Disassembly of Glen E. Bredon's `RAM.DRV.SYSTEM` for the Apple II
 
-This was started before realizing what the origin of the `RAM.SYSTEM` file was.
+This was started before realizing what the origin of the `RAM.SYSTEM`
+found on a MouseDesk 2.0 disk image file was.
 
 There is a more complete diassembly with commentary at:
 
diff --git a/orig/RAM.SYSTEM.SYS b/orig/RAM.SYSTEM.SYS
new file mode 100644
index 0000000..7e86261
Binary files /dev/null and b/orig/RAM.SYSTEM.SYS differ
diff --git a/ram.system.s b/ram.drv.system.s
similarity index 100%
rename from ram.system.s
rename to ram.drv.system.s
diff --git a/res/go.sh b/res/go.sh
index c36ecb7..c7ed09f 100755
--- a/res/go.sh
+++ b/res/go.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
 
-# Run this from the ram.system directory
+# Run this from the ram.drv.system directory
 
 set -e
 source "res/util.sh"
@@ -15,4 +15,4 @@ function verify {
 #do_make clean
 do_make all
 
-verify "RAM.SYSTEM.SYS" "ram.system.SYS"
+verify "RAM.SYSTEM.SYS" "ram.drv.system.SYS"