diff --git a/md2teach/babelfish.mk b/md2teach/babelfish.mk
index abe121b..76bca3c 100644
--- a/md2teach/babelfish.mk
+++ b/md2teach/babelfish.mk
@@ -143,7 +143,7 @@ COPYBOOTDIRS=
 # By default, the build uses these arguments with mame:
 #     apple2gs -skip_gameinfo -mouse -window -resolution 1408x1056 -ramsize 4M -sl7 cffa202
 # If you would like to use different arguments, specify that here.
-# MAMEARGS=apple2gs -skip_gameinfo -mouse -window -resolution 1408x1056 -ramsize 4M -sl7 cffa202
+# MAMEARGS=apple2gs -skip_gameinfo -speed 2 -mouse -window -resolution 1408x1056 -ramsize 4M -sl7 cffa202
 
 # For a desktop application, it can operate in 640x200 or 320x200
 # resolution.  This setting is used to define which horizontal
diff --git a/md2teach/make/head.mk b/md2teach/make/head.mk
index b5ca0be..b176c59 100644
--- a/md2teach/make/head.mk
+++ b/md2teach/make/head.mk
@@ -77,7 +77,7 @@ GSPORT=/Applications/GSport/GSport.app/Contents/MacOS/GSport
 GSPORTARGS=
 MAME=/Applications/Ample.app/Contents/MacOS/mame64
 MAMELIB=$(HOME)/Library/Application Support/Ample
-MAMEARGS=apple2gs -skip_gameinfo -mouse -window -resolution 1408x1056 -ramsize 4M -sl7 cffa202
+MAMEARGS=apple2gs -skip_gameinfo -speed 2 -mouse -window -resolution 1408x1056 -ramsize 4M -sl7 cffa202
 
 export GSPLUS
 export GSPLUSARGS
diff --git a/md2teach/make/system601.2mg b/md2teach/make/system601.2mg
index ff5588b..a0b2f55 100644
Binary files a/md2teach/make/system601.2mg and b/md2teach/make/system601.2mg differ
diff --git a/md2teach/shell.mk b/md2teach/shell.mk
index a08cf7a..617cd05 100644
--- a/md2teach/shell.mk
+++ b/md2teach/shell.mk
@@ -34,7 +34,7 @@ TARGETTYPE=shell
 # here:
 #
 # EMULATOR=gsplus
-# EMULATOR=mame
+EMULATOR=mame
 # EMULATOR=gsport
 
 # By default, the build provides a single boot environment to test with.
@@ -118,7 +118,7 @@ COPYBOOTDIRS=
 
 # By default, the build uses no arguments with GSplus.  If you would like to
 # use different arguments, specify that here.
-# GSPLUSARGS=
+GSPLUSARGS=-mem 4194304
 
 # By default, the build expects that you have GSport in the path:
 # 	/Applications/GSport/GSport.app/Contents/MacOS/GSport
@@ -142,7 +142,7 @@ COPYBOOTDIRS=
 # By default, the build uses these arguments with mame:
 # 	apple2gs -skip_gameinfo -mouse -window -resolution 1408x1056 -ramsize 4M -sl7 cffa202
 # If you would like to use different arguments, specify that here.
-# MAMEARGS=apple2gs -skip_gameinfo -mouse -window -resolution 1408x1056 -ramsize 4M -sl7 cffa202
+MAMEARGS=apple2gs -skip_gameinfo -speed 3 -mouse -window -resolution 1408x1056 -ramsize 4M -sl7 cffa202
 
 # For a desktop application, it can operate in 640x200 or 320x200
 # resolution.  This setting is used to define which horizontal