diff --git a/compiler/examples/numbergame-c64.p8 b/compiler/examples/numbergame-c64.p8
index d15aa586b..539dad67a 100644
--- a/compiler/examples/numbergame-c64.p8
+++ b/compiler/examples/numbergame-c64.p8
@@ -12,21 +12,15 @@
         memory uword freadstr_arg = $22		; argument for FREADSTR
         uword testword
 
-        testword  = guess       ; @todo fix str addrss
-        testword = "sadfsafsdf"     ; @todo fix str address
-        secretnumber = "\n"   ; @todo fix argument conversion to UBYTE
-        c64utils.init_system()
-        c64.VMCSB |= 2		; activate lowercase charset
-
         ; greeting
         c64scr.print_string("Enter your name: ")
         Y = c64scr.input_chars(name)
-        c64.CHROUT("\n")        ; @todo fix argument conversion to UBYTE
-        c64.CHROUT("\n")        ; @todo fix argument conversion to UBYTE
+        c64.CHROUT('\n')
+        c64.CHROUT('\n')
         c64scr.print_string("Hello, ")
         c64scr.print_string(name)
-        c64.CHROUT(".")     ; @todo fix argument conversion to UBYTE
-        c64.CHROUT("\n")    ; @todo fix argument conversion to UBYTE
+        c64.CHROUT('.')
+        c64.CHROUT('\n')
 
         ; create a secret random number from 1-100
         c64.RNDA(0)             ; fac = rnd(0)
@@ -36,10 +30,6 @@
         c64.FADDH()             ;   and again, so +1 total
         A, Y = c64flt.GETADRAY()        ; @todo fix return value type check
         secretnumber = A
-        ;A=math.randbyte()
-        ;A+=c64.RASTER
-        ;A-=c64.TIME_LO
-        ;X,secretnumber=math.divmod_bytes(A, 99)
 
         c64scr.print_string("I am thinking of a number from 1 to 100!You'll have to guess it!\n")
 
@@ -51,8 +41,8 @@ ask_guess:
 
         c64scr.print_string(" left.\nWhat is your next guess? ")
         Y = c64scr.input_chars(guess)
-        c64.CHROUT("\n")        ; @todo fix argument conversion to UBYTE
-        freadstr_arg = guess    ; @todo put string's adress in uword variable
+        c64.CHROUT('\n')
+        freadstr_arg = guess
         c64.FREADSTR(A)
         A, Y = c64flt.GETADRAY()    ; @todo fix return value type check
         if(A==secretnumber) {
@@ -72,7 +62,7 @@ ask_guess:
         ; game over.
         c64scr.print_string("\nToo bad! It was: ")
         c64scr.print_byte_decimal(secretnumber)
-        c64.CHROUT("\n")    ; @todo fix argument conversion to UBYTE
+        c64.CHROUT('\n')
 
 goodbye:
         c64scr.print_string("\nThanks for playing. Bye!\n")
diff --git a/compiler/examples/numbergame-novm.p8 b/compiler/examples/numbergame-novm.p8
new file mode 100644
index 000000000..ff08f2807
--- /dev/null
+++ b/compiler/examples/numbergame-novm.p8
@@ -0,0 +1,42 @@
+%import c64utils
+
+~ main {
+    sub start()  {
+        str   name    = "                    "
+        str   guess   = "000000"
+        ubyte secretnumber = rnd() % 100
+
+        c64scr.print_string("Let's play a number guessing game!\n")
+        c64scr.print_string("Enter your name: ")
+        vm_input_str(name)
+        c64scr.print_string("\nHello, ")
+        c64scr.print_string(name)
+        c64scr.print_string(".\nI am thinking of a number from 1 to 100! You'll have to guess it!\n")
+
+        for ubyte attempts_left in 10 to 1 step -1 {
+            c64scr.print_string("\nYou have ")
+            vm_write_num(attempts_left)
+            c64scr.print_string(" guess")
+            if attempts_left>1  c64scr.print_string("es")
+            c64scr.print_string(" left. What is your next guess? ")
+            vm_input_str(guess)
+            ubyte guessednumber = str2ubyte(guess)
+            if guessednumber==secretnumber {
+                c64scr.print_string("\nYou guessed it, impressive!\n")
+                c64scr.print_string("Thanks for playing.\n")
+                return
+            } else {
+                c64scr.print_string("That is too ")
+                if guessednumber<secretnumber
+                    c64scr.print_string("low!\n")
+                else
+                    c64scr.print_string("high!\n")
+            }
+        }
+
+        c64scr.print_string("\nToo bad! My number was: ")
+        vm_write_num(secretnumber)
+        c64scr.print_string(".\n")
+        return
+    }
+}
diff --git a/compiler/src/prog8/compiler/Compiler.kt b/compiler/src/prog8/compiler/Compiler.kt
index 928048a01..1a85a4f81 100644
--- a/compiler/src/prog8/compiler/Compiler.kt
+++ b/compiler/src/prog8/compiler/Compiler.kt
@@ -810,7 +810,7 @@ private class StatementTranslator(private val prog: IntermediateProgram,
                                 translate(arg.first)
                                 prog.instr(Opcode.POP_REGAX_WORD)
                             } else
-                                throw CompilerException("don't know how to pass register parameter of type $paramDt")
+                                TODO("pass parameter of type $paramDt in registers ${arg.second.registerOrPair}")
                         }
                         AY -> {
                             val valueA: IExpression
@@ -829,7 +829,7 @@ private class StatementTranslator(private val prog: IntermediateProgram,
                                 translate(arg.first)
                                 prog.instr(Opcode.POP_REGAY_WORD)
                             } else
-                                throw CompilerException("don't know how to pass register parameter of type $paramDt")
+                                TODO("pass parameter of type $paramDt in registers ${arg.second.registerOrPair}")
                         }
                         XY -> {
                             // TODO: save X on stack & restore after call
@@ -849,7 +849,7 @@ private class StatementTranslator(private val prog: IntermediateProgram,
                                 translate(arg.first)
                                 prog.instr(Opcode.POP_REGXY_WORD)
                             } else
-                                throw CompilerException("don't know how to pass register parameter of type $paramDt")
+                                TODO("pass parameter of type $paramDt in registers ${arg.second.registerOrPair}")
                         }
                     }
                 }