diff --git a/codegen.e b/codegen.e
index 304f132..1b69f4c 100644
--- a/codegen.e
+++ b/codegen.e
@@ -64,7 +64,7 @@ DEF g_sizeofptr
 DEF g_linelist:PTR TO linedef, g_codelablist:PTR TO codelab, g_multireturn:PTR TO multireturn
 DEF g_optpowerpc, g_optmodule
 DEF g_globalsize, g_rwreflist:PTR TO rwref, g_databufsize
-DEF g_nilcheck, g_linedebug
+DEF g_nilcheck, g_linedebug, g_stepdebug,g_stepdebug50
 DEF link_reloc32list, link_nrofreloc32s
 DEF g_linenum, g_numregalloc, g_numfregalloc
 DEF g_stacksize, g_modulelist:PTR TO mlh
@@ -449,6 +449,14 @@ PROC def_line(l)
       IF g_linelist.offset = (currentOffset()) THEN RETURN
    ENDIF
    g_linelist := NEW [g_linelist, l, currentOffset()]:linedef
+   IF g_stepdebug AND (g_optpowerpc=CPU_M68)
+     nop()
+   ENDIF
+   IF g_stepdebug50 AND (g_optpowerpc=CPU_M68)
+     nop()
+     nop()
+     nop()
+   ENDIF
 ENDPROC
 
 
@@ -658,7 +666,7 @@ PROC compileCode(n:PTR TO item, oneliner=FALSE) OF codegen
    #endif
 
    IF FreeStack() < 4000 THEN Raise("STCK") -> 2.0
-
+   
 
    WHILE (t := n.data)
       as := NIL
diff --git a/diself.e b/diself.e
index 63de696..f423a8d 100644
--- a/diself.e
+++ b/diself.e
@@ -3,7 +3,7 @@
 
 OPT PREPROCESS
 
-MODULE '*ecxelf'
+MODULE '*eecelf'
 MODULE '*ppcdisasm'
 
 -> Jan, Apr, Jul 2003
diff --git a/dishunk.e b/dishunk.e
index f1def64..edd179b 100644
--- a/dishunk.e
+++ b/dishunk.e
@@ -24,6 +24,9 @@ ENDPROC x SHR v
 PROC main() HANDLE
    DEF fh=NIL, ptr:PTR TO LONG, str[24]:STRING, rdargs=NIL, args[2]:ARRAY OF LONG
 
+   args[]:=0
+   args[1]:=0
+
    /* read agrs */
    rdargs := ReadArgs('FILE/A,'+
                       'DIS/S',
@@ -41,8 +44,6 @@ PROC main() HANDLE
 
    disasm := args[1]
 
-
-
    WHILE (ptr := dohunk(ptr))
    ENDWHILE
 
diff --git a/eecmain.e b/eecmain.e
index 7fb2412..a232ba0 100644
--- a/eecmain.e
+++ b/eecmain.e
@@ -124,6 +124,8 @@ DEF g_optimize=FALSE -> OPTI/S
 DEF g_nowarn=FALSE -> OPT NOWARN, NOWARN/S
 DEF g_vardebug=FALSE -> VARDEBUG/S
 DEF g_linedebug=FALSE -> LINEDEBUG/S
+DEF g_stepdebug=FALSE -> STEPDEBUG/S
+DEF g_stepdebug50=FALSE -> STEPDEBUG50/S
 DEF g_symbolhunk=FALSE -> SYMBOLHUNK/S
 DEF g_quiet=FALSE -> v49
 DEF g_showbuf=FALSE
@@ -291,6 +293,7 @@ ENUM ARG_SOURCE,
 	  ARG_EXENAME, -> v49
 	  ARG_MODNAME, -> 1.5.6
 	  ARG_STEPDEBUG, -> 1.6.0
+	  ARG_STEPDEBUG50, -> 2.3.1
 	  ARG_POWERPC, -> v52
 	  ARG_MORPHOS, -> v52
 	  ARG_AMIGAOS, -> 1.10.0
@@ -346,6 +349,7 @@ PROC main() HANDLE
 	                   'EXENAME/K,'+
 	                   'MODNAME/K,'+
 	                   'STEP=STEPDEBUG/S,'+
+	                   'STEP50=STEPDEBUG50/S,'+
 	                   'POWERPC/S,'+
 	                   'MORPHOS/S,'+
 	                   'AMIGAOS/S,'+
@@ -400,6 +404,18 @@ PROC main() HANDLE
 	   g_symbolhunk := TRUE
 	ENDIF
 	IF args[ARG_LINEDEBUG]  THEN g_linedebug := TRUE
+	IF args[ARG_STEPDEBUG] 
+     g_stepdebug := TRUE
+     g_symbolhunk := TRUE
+     g_linedebug := TRUE
+     g_vardebug := TRUE
+  ENDIF
+	IF args[ARG_STEPDEBUG50]
+    g_stepdebug50 := TRUE
+    g_symbolhunk := TRUE
+    g_linedebug := TRUE
+    g_vardebug := TRUE
+  ENDIF
 	IF args[ARG_VARDEBUG]   THEN g_vardebug := TRUE
 	IF args[ARG_SHOWBUF]    THEN g_showbuf := TRUE
 	IF args[ARG_WBTOFRONT]  THEN wbtofront := TRUE