diff --git a/Makefile b/Makefile
index 295054c2a..3ef74ff8e 100644
--- a/Makefile
+++ b/Makefile
@@ -10,7 +10,7 @@
 # adapted by 4am on 2018-08-19
 #
 
-DISK=4cade.2mg
+DISK=4cade.hdv
 VOLUME=TOTAL.REPLAY
 
 # third-party tools required to build
@@ -26,7 +26,7 @@ CADIUS=cadius
 EXOMIZER=exomizer mem -q -P23 -lnone
 
 dsk: md asm
-	cp res/blank.2mg build/"$(DISK)" >>build/log
+	cp res/blank.hdv build/"$(DISK)" >>build/log
 	cp res/_FileInformation.txt build/ >>build/log
 	$(CADIUS) ADDFILE build/"$(DISK)" "/$(VOLUME)/" "build/LAUNCHER.SYSTEM" >>build/log
 	rsync -aP res/PREFS.CONF build/PREFS.CONF >> build/log
diff --git a/bin/changebootloader.js b/bin/changebootloader.js
index 7875c2efb..06dc1a5d0 100644
--- a/bin/changebootloader.js
+++ b/bin/changebootloader.js
@@ -1,7 +1,6 @@
 a = new ActiveXObject("scripting.filesystemobject")
 b = a.opentextfile(WScript.Arguments(0))
-c = b.read(0x40)
 b.skip(0x200)
-d = b.read(a.getfile(WScript.Arguments(0)).size-0x240)
+d = b.read(a.getfile(WScript.Arguments(0)).size-0x200)
 b.close()
-b=a.createtextfile(WScript.Arguments(0), 1).write(c+a.opentextfile(WScript.Arguments(1)).read(512)+d)
+b=a.createtextfile(WScript.Arguments(0), 1).write(a.opentextfile(WScript.Arguments(1)).read(512)+d)
diff --git a/bin/changebootloader.sh b/bin/changebootloader.sh
index 9f4b8c6d4..bb0417d50 100755
--- a/bin/changebootloader.sh
+++ b/bin/changebootloader.sh
@@ -1,3 +1,3 @@
 #!/bin/sh
 
-dd of="$1" bs=1 seek=64 count=512 conv=notrunc < "$2"
+dd of="$1" bs=1 count=512 conv=notrunc < "$2"
diff --git a/res/blank.2mg b/res/blank.hdv
similarity index 99%
rename from res/blank.2mg
rename to res/blank.hdv
index 781f8fe64..7c46b9ca9 100644
Binary files a/res/blank.2mg and b/res/blank.hdv differ
diff --git a/winmake.bat b/winmake.bat
index 54c903829..e61d283dd 100644
--- a/winmake.bat
+++ b/winmake.bat
@@ -7,7 +7,7 @@ rem a qkumba monstrosity from 2018-10-29
 rem
 
 setlocal enabledelayedexpansion
-set DISK=4cade.2mg
+set DISK=4cade.hdv
 set VOLUME=TOTAL.REPLAY
 
 rem third-party tools required to build (must be in path)
@@ -42,7 +42,7 @@ if "%1" equ "dsk" (
 call :asm
 call :compress
 2>nul del build\log
-1>nul copy /y res\blank.2mg "build\%DISK%" >>build\log
+1>nul copy /y res\blank.hdv "build\%DISK%" >>build\log
 1>nul copy /y res\_FileInformation.txt build\ >>build\log
 %CADIUS% ADDFILE "build\%DISK%" "/%VOLUME%/" "build\LAUNCHER.SYSTEM" >>build\log
 1>nul copy /y res\PREFS.CONF build\ >>build\log