diff --git a/Makefile b/Makefile
index bf16831..c4bda90 100644
--- a/Makefile
+++ b/Makefile
@@ -9,7 +9,7 @@
 # adapted by 4am on 2018-01-07
 #
 
-DISK=Pitch Dark.2mg
+DISK=Pitch Dark.hdv
 
 # third-party tools required to build
 # https://sourceforge.net/projects/acme-crossass/
@@ -39,7 +39,7 @@ asm: md
 	$(ACME) -r build/zinfo5u.lst src/zinfo/z5u/z5u.s
 
 dsk: md asm
-	cp res/"Pitch Dark.master games collection.do.not.edit.2mg" build/"$(DISK)"
+	cp res/"Pitch Dark.master games collection.do.not.edit.hdv" build/"$(DISK)"
 	cp res/_FileInformation.txt build/
 	bin/fixFileInformation.sh build/_FileInformation.txt
 	$(CADIUS) ADDFILE build/"$(DISK)" "/PITCH.DARK/" "build/GRUE.SYSTEM"
diff --git a/README.md b/README.md
index dc17c3f..8339014 100644
--- a/README.md
+++ b/README.md
@@ -9,7 +9,7 @@
 You will need
  - [Xcode command line tools](https://www.google.com/search?q=xcode+command+line+tools)
  - [ACME](https://sourceforge.net/projects/acme-crossass/)
- - [sicklittlemonkey's Cadius fork](https://github.com/sicklittlemonkey/cadius)
+ - [Cadius](https://github.com/mach-kernel/cadius)
 
 Then open a terminal window and type
 
@@ -18,7 +18,7 @@ $ cd pitch-dark/
 $ make
 ```
 
-If all goes well, the `build/` subdirectory will contain a `Pitch Dark.2mg` image which can be mounted in emulators like [OpenEmulator](https://archive.org/details/OpenEmulatorSnapshots) or [Virtual II](http://virtualii.com/).
+If all goes well, the `build/` subdirectory will contain a `Pitch Dark.hdv` image which can be mounted in emulators like [OpenEmulator](https://archive.org/details/OpenEmulatorSnapshots) or [Virtual II](http://virtualii.com/).
 
 ## Windows
 
@@ -34,4 +34,4 @@ Then open a `CMD.EXE` window and type
 C:\> CD PITCH-DARK
 C:\4cade> WINMAKE
 ```
-If all goes well, the `BUILD\` subdirectory will contain a `Pitch Dark.2mg` image which can be mounted in emulators like [AppleWin](https://github.com/AppleWin/AppleWin).
+If all goes well, the `BUILD\` subdirectory will contain a `Pitch Dark.hdv` image which can be mounted in emulators like [AppleWin](https://github.com/AppleWin/AppleWin).
diff --git a/res/Pitch Dark.master games collection.do.not.edit.2mg b/res/Pitch Dark.master games collection.do.not.edit.hdv
similarity index 99%
rename from res/Pitch Dark.master games collection.do.not.edit.2mg
rename to res/Pitch Dark.master games collection.do.not.edit.hdv
index f26a723..6bf791f 100644
Binary files a/res/Pitch Dark.master games collection.do.not.edit.2mg and b/res/Pitch Dark.master games collection.do.not.edit.hdv differ