diff --git a/ase/stx/bootstrp.c b/ase/stx/bootstrp.c
index 5e1dd590..2d26e61e 100644
--- a/ase/stx/bootstrp.c
+++ b/ase/stx/bootstrp.c
@@ -1,5 +1,5 @@
 /*
- * $Id: bootstrp.c,v 1.22 2005-07-05 11:15:51 bacon Exp $
+ * $Id: bootstrp.c,v 1.23 2005-07-07 07:45:05 bacon Exp $
  */
 
 #include <xp/stx/bootstrp.h>
@@ -472,7 +472,7 @@ static void __create_builtin_classes (xp_stx_t* stx)
 		}
 
 		xp_assert (class != stx->nil);
-		class_obj = (xp_stx_class_t*)XP_STX_WORD_OBJECT(stx, class);
+		class_obj = (xp_stx_class_t*)XP_STX_OBJECT(stx, class);
 		class_obj->superclass = (p->superclass == XP_NULL)?
 			stx->nil: xp_stx_lookup_class(stx,p->superclass);
 
@@ -485,13 +485,13 @@ static void __create_builtin_classes (xp_stx_t* stx)
 			xp_assert (superclass != stx->nil);
 
 			meta = class_obj->header.class;
-			meta_obj = (xp_stx_metaclass_t*)XP_STX_WORD_OBJECT(stx,meta);
+			meta_obj = (xp_stx_metaclass_t*)XP_STX_OBJECT(stx,meta);
 			meta_obj->superclass = XP_STX_CLASS(stx,superclass);
 			meta_obj->instance_class = class;
 
 			while (superclass != stx->nil) {
 				superclass_obj = (xp_stx_class_t*)
-					XP_STX_WORD_OBJECT(stx,superclass);
+					XP_STX_OBJECT(stx,superclass);
 				nfields += 
 					XP_STX_FROM_SMALLINT(superclass_obj->spec) >>
 					XP_STX_SPEC_INDEXABLE_BITS;
@@ -518,7 +518,7 @@ static void __create_builtin_classes (xp_stx_t* stx)
 		class = xp_stx_lookup_class(stx, p->name);
 		xp_assert (class != stx->nil);
 
-		class_obj = (xp_stx_class_t*)XP_STX_WORD_OBJECT(stx, class);
+		class_obj = (xp_stx_class_t*)XP_STX_OBJECT(stx, class);
 
 		if (p->class_variables != XP_NULL) {
 			class_obj->class_variables = 
@@ -542,7 +542,7 @@ static void __create_builtin_classes (xp_stx_t* stx)
 
 		class = xp_stx_lookup_class(stx, p->name);
 		xp_assert (class != stx->nil);
-		class_obj = (xp_stx_class_t*)XP_STX_WORD_OBJECT(stx, class);
+		class_obj = (xp_stx_class_t*)XP_STX_OBJECT(stx, class);
 		class_obj->subclasses = array;
 	}
 
@@ -555,7 +555,7 @@ static void __create_builtin_classes (xp_stx_t* stx)
 		class = xp_stx_lookup_class(stx, p->name);
 		xp_assert (class != stx->nil);
 		metaclass = XP_STX_CLASS(stx,class);
-		metaclass_obj = (xp_stx_metaclass_t*)XP_STX_WORD_OBJECT(stx, metaclass);
+		metaclass_obj = (xp_stx_metaclass_t*)XP_STX_OBJECT(stx, metaclass);
 		metaclass_obj->subclasses = array;
 	}
 }
diff --git a/ase/stx/bytecode.c b/ase/stx/bytecode.c
new file mode 100644
index 00000000..beee3034
--- /dev/null
+++ b/ase/stx/bytecode.c
@@ -0,0 +1,79 @@
+/*
+ * $Id: bytecode.c,v 1.1 2005-07-07 07:45:05 bacon Exp $
+ */
+#include <xp/stx/bytecode.h>
+#include <xp/stx/class.h>
+#include <xp/stx/method.h>
+#include <xp/stx/hash.h>
+
+static void __decode1 (xp_stx_t* stx, xp_word_t idx, void* data);
+static int __decode2 (xp_stx_t* stx, 
+	xp_stx_class_t* class_obj, xp_stx_method_t* method_obj);
+
+int xp_stx_decode (xp_stx_t* stx, xp_word_t class)
+{
+	xp_stx_class_t* class_obj;
+
+	class_obj = (xp_stx_class_t*)XP_STX_OBJECT(stx, class);
+	if (class_obj->methods == stx->nil) return 0;
+
+/* TODO */
+	xp_stx_hash_traverse (stx, class_obj->methods, __decode1, class_obj);
+	return 0;
+}
+
+static void __decode1 (xp_stx_t* stx, xp_word_t idx, void* data)
+{
+	xp_stx_method_t* method_obj;
+	xp_word_t key = XP_STX_WORDAT(stx,idx,XP_STX_PAIRLINK_KEY);
+	xp_word_t value = XP_STX_WORDAT(stx,idx,XP_STX_PAIRLINK_VALUE);
+
+	xp_printf (XP_TEXT("Method: %s\n"), XP_STX_DATA(stx, key));
+	method_obj = (xp_stx_method_t*)XP_STX_OBJECT(stx, value);
+	__decode2 (stx, data, method_obj);
+}
+
+static int __decode2 (xp_stx_t* stx, 
+	xp_stx_class_t* class_obj, xp_stx_method_t* method_obj)
+{
+	xp_stx_byte_object_t* bytecodes;
+	xp_word_t bytecode_size, pc = 0;
+	xp_byte_t code;
+	int opcode, operand;
+
+	bytecodes = XP_STX_BYTE_OBJECT(stx, method_obj->bytecodes);
+	bytecode_size = XP_STX_SIZE(stx, method_obj->bytecodes);
+
+	while (pc < bytecode_size) {
+		code = bytecodes->data[pc++];
+
+		opcode = (code & 0xF0) >> 4;
+		operand = code & 0x0F;
+		if (opcode > 0x9) {
+			if (pc >= bytecode_size) {
+				/* TODO: */	
+				xp_printf (XP_TEXT("error in bytecodes\n"));
+				return -1;
+			}
+			code = bytecodes->data[pc++];
+			operand |= (code << 4);
+		}
+
+		xp_printf (XP_TEXT("opcode = %d, operand = %d\n"), opcode, operand);
+
+		switch (opcode) {
+		case DO_PRIMITIVE:
+			xp_printf (XP_TEXT("DO_PRIMITIVE %d\n"), operand);
+			break;
+		case DO_PRIMITIVE_EXTENDED:
+			xp_printf (XP_TEXT("DO_PIRMITIVE_EXTENDED %d\n"), operand);
+			break;
+		default:
+			xp_printf (XP_TEXT("Unknown\n"));
+		}
+	}
+
+
+        return 0;
+}
+
diff --git a/ase/stx/bytecode.h b/ase/stx/bytecode.h
index 5b681664..ed055c31 100644
--- a/ase/stx/bytecode.h
+++ b/ase/stx/bytecode.h
@@ -1,14 +1,28 @@
 /*
- * $Id: bytecode.h,v 1.1 2005-07-05 11:38:01 bacon Exp $
+ * $Id: bytecode.h,v 1.2 2005-07-07 07:45:05 bacon Exp $
  */
 
 #ifndef _XP_STX_BYTECODE_H_
 #define _XP_STX_BYTECODE_H_
 
-#define PUSH_VARIABLE   0x1
-#define PUSH_ARGUMENT   0x2
-#define PUSH_TEMPORARY  0x3
-#define PUSH_LITERAL    0x4
-#define DO_PRIMITIVE    0xF
+#include <xp/stx/stx.h>
+
+#define PUSH_VARIABLE         0x0
+#define PUSH_ARGUMENT         0x1
+#define PUSH_TEMPORARY        0x2
+#define PUSH_LITERAL          0x3
+#define DO_SPECIAL            0x5
+#define DO_PRIMITIVE          0x6
+#define DO_PRIMITIVE_EXTENDED 0xF
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+int xp_stx_decode (xp_stx_t* stx, xp_word_t class_idx);
+
+#ifdef __cplusplus
+}
+#endif
 
 #endif
diff --git a/ase/stx/class.c b/ase/stx/class.c
index 20b5bdfe..fe98ac21 100644
--- a/ase/stx/class.c
+++ b/ase/stx/class.c
@@ -1,5 +1,5 @@
 /*
- * $Id: class.c,v 1.20 2005-07-05 11:15:51 bacon Exp $
+ * $Id: class.c,v 1.21 2005-07-07 07:45:05 bacon Exp $
  */
 
 #include <xp/stx/class.h>
@@ -58,7 +58,7 @@ int xp_stx_get_instance_variable_index (
 	xp_stx_class_t* class_obj;
 	xp_stx_char_object_t* string;
 
-	class_obj = (xp_stx_class_t*)XP_STX_WORD_OBJECT(stx, class_index);
+	class_obj = (xp_stx_class_t*)XP_STX_OBJECT(stx, class_index);
 	xp_assert (class_obj != XP_NULL);
 
 	if (class_obj->superclass != stx->nil) {
@@ -95,7 +95,7 @@ xp_word_t xp_stx_lookup_class_variable (
 {
 	xp_stx_class_t* class_obj;
 
-	class_obj = (xp_stx_class_t*)XP_STX_WORD_OBJECT(stx, class_index);
+	class_obj = (xp_stx_class_t*)XP_STX_OBJECT(stx, class_index);
 	xp_assert (class_obj != XP_NULL);
 
 	if (class_obj->superclass != stx->nil) {
diff --git a/ase/stx/hash.c b/ase/stx/hash.c
index 210f4556..b2156a19 100644
--- a/ase/stx/hash.c
+++ b/ase/stx/hash.c
@@ -1,5 +1,5 @@
 /*
- * $Id: hash.c,v 1.24 2005-07-05 15:01:57 bacon Exp $
+ * $Id: hash.c,v 1.25 2005-07-07 07:45:05 bacon Exp $
  */
 
 #include <xp/stx/hash.h>
@@ -14,7 +14,7 @@ xp_word_t xp_stx_new_pairlink (
 
 	x = xp_stx_alloc_word_object (
 		stx, XP_NULL, XP_STX_PAIRLINK_SIZE, XP_NULL, 0);
-	obj = (xp_stx_pairlink_t*)XP_STX_WORD_OBJECT(stx, x);
+	obj = (xp_stx_pairlink_t*)XP_STX_OBJECT(stx, x);
 	obj->header.class = stx->class_pairlink;
 	obj->link = stx->nil;
 	obj->key = key;
@@ -42,7 +42,7 @@ xp_word_t xp_stx_hash_lookup (
 		link = XP_STX_WORDAT(stx,link,XP_STX_PAIRLINK_LINK);
 		*/
 
-		obj = (xp_stx_pairlink_t*)XP_STX_WORD_OBJECT(stx,link);
+		obj = (xp_stx_pairlink_t*)XP_STX_OBJECT(stx,link);
 		if (obj->key == key) return link;
 		link = obj->link;
 	}
@@ -63,7 +63,7 @@ xp_word_t xp_stx_hash_lookup_symbol (
 	link = XP_STX_WORDAT(stx,table,hash);
 
 	while (link != stx->nil) {
-		obj = (xp_stx_pairlink_t*)XP_STX_WORD_OBJECT(stx,link);
+		obj = (xp_stx_pairlink_t*)XP_STX_OBJECT(stx,link);
 		tmp = XP_STX_CHAR_OBJECT(stx,obj->key);
 		if (tmp->header.class == stx->class_symbol &&
 		    xp_strcmp (tmp->data, name) == 0) return link;
@@ -110,7 +110,7 @@ void xp_stx_hash_insert (
 
 void xp_stx_hash_traverse (
 	xp_stx_t* stx, xp_word_t table, 
-	void (*func) (xp_stx_t*,xp_word_t))
+	void (*func) (xp_stx_t*,xp_word_t,void*), void* data)
 {
 	xp_word_t link;
 	xp_word_t size = XP_STX_SIZE(stx,table);
@@ -119,7 +119,7 @@ void xp_stx_hash_traverse (
 		link = XP_STX_WORDAT(stx,table,size);
 
 		while (link != stx->nil) {
-			func (stx,link);
+			func (stx, link, data);
 			link = XP_STX_WORDAT(stx,link,XP_STX_PAIRLINK_LINK);
 		}
 	}
diff --git a/ase/stx/hash.h b/ase/stx/hash.h
index 879c3cb6..857b4b3f 100644
--- a/ase/stx/hash.h
+++ b/ase/stx/hash.h
@@ -1,5 +1,5 @@
 /*
- * $Id: hash.h,v 1.9 2005-06-08 16:00:51 bacon Exp $
+ * $Id: hash.h,v 1.10 2005-07-07 07:45:05 bacon Exp $
  */
 
 #ifndef _XP_STX_HASH_H_
@@ -39,7 +39,7 @@ void xp_stx_hash_insert (
 	xp_word_t hash, xp_word_t key, xp_word_t value);
 void xp_stx_hash_traverse (
 	xp_stx_t* stx, xp_word_t table, 
-	void (*func) (xp_stx_t*,xp_word_t));
+	void (*func) (xp_stx_t*,xp_word_t,void*), void* data);
 
 #ifdef __cplusplus
 }
diff --git a/ase/stx/interp.h b/ase/stx/interp.h
index 2b7a79b0..95ca7aa3 100644
--- a/ase/stx/interp.h
+++ b/ase/stx/interp.h
@@ -1,10 +1,12 @@
 /*
- * $Id: interp.h,v 1.1 2005-05-13 16:45:55 bacon Exp $
+ * $Id: interp.h,v 1.2 2005-07-07 07:45:05 bacon Exp $
  */
 
 #ifndef _XP_STX_INTERP_H_
 #define _XP_STX_INTERP_H_
 
+#include <xp/stx/stx.h>
+
 #ifdef __cplusplus
 extern "C" {
 #endif
diff --git a/ase/stx/makefile.in b/ase/stx/makefile.in
index af992bbd..c6dd0ae3 100644
--- a/ase/stx/makefile.in
+++ b/ase/stx/makefile.in
@@ -1,5 +1,5 @@
 SRCS = stx.c memory.c object.c symbol.c class.c \
-	hash.c misc.c method.c context.c name.c token.c parser.c bootstrp.c
+	hash.c misc.c context.c name.c token.c parser.c bootstrp.c bytecode.c
 OBJS = $(SRCS:.c=.o)
 OUT = libxpstx.a
 
diff --git a/ase/stx/misc.h b/ase/stx/misc.h
index 7dff3a56..eda382b4 100644
--- a/ase/stx/misc.h
+++ b/ase/stx/misc.h
@@ -1,5 +1,5 @@
 /*
- * $Id: misc.h,v 1.11 2005-07-05 11:15:51 bacon Exp $
+ * $Id: misc.h,v 1.12 2005-07-07 07:45:05 bacon Exp $
  */
 
 #ifndef _XP_STX_MISC_H_
@@ -13,6 +13,7 @@
 	#include <stdarg.h>
 	#include <stdio.h>
 	#include <ctype.h>
+	#include <stdlib.h>
 
 	#define xp_assert   assert
 	#define xp_malloc   malloc
@@ -32,6 +33,7 @@
 	#include <xp/bas/stdarg.h>
 	#include <xp/bas/ctype.h>
 	#include <xp/bas/string.h>
+	#include <xp/bas/stdlib.h>
 #endif
 
 #if defined(__BORLANDC__) || defined(_MSC_VER)
diff --git a/ase/stx/object.c b/ase/stx/object.c
index 632bd438..d196e639 100644
--- a/ase/stx/object.c
+++ b/ase/stx/object.c
@@ -1,5 +1,5 @@
 /*
- * $Id: object.c,v 1.35 2005-07-05 11:15:51 bacon Exp $
+ * $Id: object.c,v 1.36 2005-07-07 07:45:05 bacon Exp $
  */
 
 #include <xp/stx/object.h>
@@ -192,7 +192,7 @@ xp_word_t xp_stx_instantiate (
 	xp_word_t spec, nfields, new;
 	int indexable;
 
-	class_obj = (xp_stx_class_t*)XP_STX_WORD_OBJECT(stx, class_index);
+	class_obj = (xp_stx_class_t*)XP_STX_OBJECT(stx, class_index);
 
 	/* don't instantiate a metaclass whose instance must be 
 	   created in a different way */
diff --git a/ase/stx/parser.c b/ase/stx/parser.c
index c20c75f0..d73d1431 100644
--- a/ase/stx/parser.c
+++ b/ase/stx/parser.c
@@ -1,5 +1,5 @@
 /*
- * $Id: parser.c,v 1.55 2005-07-05 11:38:01 bacon Exp $
+ * $Id: parser.c,v 1.56 2005-07-07 07:45:05 bacon Exp $
  */
 
 #include <xp/stx/parser.h>
@@ -117,11 +117,8 @@ void xp_stx_parser_close (xp_stx_parser_t* parser)
 #define EMIT_CODE_TEST(parser,high,low) \
 	do { if (__emit_code_test(parser,high,low) == -1) return -1; } while (0)
 
-#define EMIT_CODE(parser,high,low) \
-	do { if (__emit_code(parser,high,low) == -1) { \
-		parser->error_code = XP_STX_PARSER_ERROR_MEMORY; \
-		return -1; \
-	} while(0)
+#define EMIT_CODE(parser,code) \
+	do { if (__emit_code(parser,code) == -1) return -1; } while(0)
 
 #define GET_CHAR(parser) \
 	do { if (__get_char(parser) == -1) return -1; } while (0)
@@ -158,6 +155,7 @@ const xp_char_t* xp_stx_parser_error_string (xp_stx_parser_t* parser)
 
 		XP_TEXT("invalid primitive type"),
 		XP_TEXT("primitive number expected"),
+		XP_TEXT("primitive number out of range"),
 		XP_TEXT("primitive not closed"),
 
 		XP_TEXT("temporary list not closed"),
@@ -251,9 +249,15 @@ static INLINE int __emit_code_test (
 
 static INLINE int __emit_code (xp_stx_parser_t* parser, xp_byte_t code)
 {
-	return (xp_array_add_datum(&parser->bytecode, &code) == XP_NULL)? -1: 0;
+	if (xp_array_add_datum(&parser->bytecode, &code) == XP_NULL) {
+		parser->error_code = XP_STX_PARSER_ERROR_MEMORY;
+		return -1;
+	}
+
+	return 0;
 }
 
+
 int xp_stx_parser_parse_method (
 	xp_stx_parser_t* parser, xp_word_t method_class, void* input)
 {
@@ -313,7 +317,7 @@ static int __finish_method (xp_stx_parser_t* parser)
 	xp_assert (parser->bytecode.size != 0);
 
 	class_obj = (xp_stx_class_t*)
-		XP_STX_WORD_OBJECT(stx, parser->method_class);
+		XP_STX_OBJECT(stx, parser->method_class);
 
 	if (class_obj->methods == stx->nil) {
 		/* TODO: reconfigure method dictionary size */
@@ -327,7 +331,7 @@ static int __finish_method (xp_stx_parser_t* parser)
 
 	method = xp_stx_instantiate(stx, stx->class_method, 
 		XP_NULL, parser->literals, parser->literal_count);
-	method_obj = (xp_stx_method_t*)XP_STX_WORD_OBJECT(stx, method);
+	method_obj = (xp_stx_method_t*)XP_STX_OBJECT(stx, method);
 
 	/* TODO: text saving must be optional */
 	/*method_obj->text = xp_stx_instantiate (
@@ -520,6 +524,8 @@ static int __parse_primitive (xp_stx_parser_t* parser)
 	 * <primitive> ::= '<' 'primitive:' number '>'
 	 */
 
+	int prim_no;
+
 	if (!__is_primitive_opener(&parser->token)) return 0;
 	GET_TOKEN (parser);
 
@@ -534,16 +540,26 @@ static int __parse_primitive (xp_stx_parser_t* parser)
 		parser->error_code = XP_STX_PARSER_ERROR_PRIMITIVE_NUMBER;
 		return -1;
 	}
-EMIT_CODE_TEST (parser, XP_TEXT("DO_PRIMITIVE"), parser->token.name.buffer);
 
-/*
-	EMIT_CODE_TEST (parser, DO_PRIMITIVE);
-	EMIT_CODE_TEST (parser, parser->token.ivalue);
+/*TODO: more checks the validity of the primitive number */
+	if (!xp_stristype(parser->token.name.buffer, xp_isdigit)) {
+		parser->error_code = XP_STX_PARSER_ERROR_PRIMITIVE_NUMBER;
+		return -1;
+	}
 
-	EMIT_CODE_TEST (parser, DO_PRIMITIVE_EXTENDED);
-	EMIT_CODE_TEST (parser, parser->token.ivalue);
-	EMIT_CODE_TEST (parser, parser->token.ivalue);
-*/
+	XP_STRTOI (prim_no, parser->token.name.buffer, XP_NULL, 10);
+	if (prim_no < 0 || prim_no > 0x0FFF) {
+		parser->error_code = XP_STX_PARSER_ERROR_PRIMITIVE_NUMBER_RANGE;
+		return -1;
+	}
+
+	if (prim_no <= 0x0F)  {
+		EMIT_CODE (parser, (DO_PRIMITIVE << 4) | prim_no);
+	}
+	else {
+		EMIT_CODE (parser, (DO_PRIMITIVE_EXTENDED << 4) | (prim_no & 0x0F));
+		EMIT_CODE (parser, prim_no >> 4);
+	}
 
 	GET_TOKEN (parser);
 	if (!__is_primitive_closer(&parser->token)) {
diff --git a/ase/stx/parser.h b/ase/stx/parser.h
index 2cf1631c..3b267252 100644
--- a/ase/stx/parser.h
+++ b/ase/stx/parser.h
@@ -1,5 +1,5 @@
 /*
- * $Id: parser.h,v 1.29 2005-07-05 09:02:13 bacon Exp $
+ * $Id: parser.h,v 1.30 2005-07-07 07:45:05 bacon Exp $
  */
 
 #ifndef _XP_STX_PARSER_H_
@@ -32,6 +32,7 @@ enum
 
 	XP_STX_PARSER_ERROR_PRIMITIVE_KEYWORD,
 	XP_STX_PARSER_ERROR_PRIMITIVE_NUMBER,
+	XP_STX_PARSER_ERROR_PRIMITIVE_NUMBER_RANGE,
 	XP_STX_PARSER_ERROR_PRIMITIVE_NOT_CLOSED,
 
 	XP_STX_PARSER_ERROR_TEMPORARIES_NOT_CLOSED,
diff --git a/ase/stx/symbol.c b/ase/stx/symbol.c
index 5aab5152..a63c8853 100644
--- a/ase/stx/symbol.c
+++ b/ase/stx/symbol.c
@@ -1,5 +1,5 @@
 /*
- * $Id: symbol.c,v 1.13 2005-07-05 09:02:13 bacon Exp $
+ * $Id: symbol.c,v 1.14 2005-07-07 07:45:05 bacon Exp $
  */
 
 #include <xp/stx/symbol.h>
@@ -138,7 +138,7 @@ xp_word_t xp_stx_new_symbol_pp (
 }
 
 void xp_stx_traverse_symbol_table (
-	xp_stx_t* stx, void (*func) (xp_stx_t*,xp_word_t))
+	xp_stx_t* stx, void (*func) (xp_stx_t*,xp_word_t,void*), void* data)
 {
 	xp_word_t link;
 	xp_word_t size;
@@ -151,7 +151,7 @@ void xp_stx_traverse_symbol_table (
 		link = XP_STX_WORDAT(stx,table,size);
 
 		while (link != stx->nil) {
-			func (stx,XP_STX_WORDAT(stx,link,XP_STX_SYMLINK_SYMBOL));
+			func (stx, XP_STX_WORDAT(stx,link,XP_STX_SYMLINK_SYMBOL), data);
 			link = XP_STX_WORDAT(stx,link,XP_STX_SYMLINK_LINK);
 		}
 	}
diff --git a/ase/stx/symbol.h b/ase/stx/symbol.h
index c3e0b5e0..b0008ffc 100644
--- a/ase/stx/symbol.h
+++ b/ase/stx/symbol.h
@@ -1,5 +1,5 @@
 /*
- * $Id: symbol.h,v 1.6 2005-06-08 16:00:51 bacon Exp $
+ * $Id: symbol.h,v 1.7 2005-07-07 07:45:05 bacon Exp $
  */
 
 #ifndef _XP_STX_SYMBOL_H_
@@ -35,7 +35,7 @@ xp_word_t xp_stx_new_symbol_pp (
 	xp_stx_t* stx, const xp_char_t* name,
 	const xp_char_t* prefix, const xp_char_t* postfix);
 void xp_stx_traverse_symbol_table (
-        xp_stx_t* stx, void (*func) (xp_stx_t*,xp_word_t));
+        xp_stx_t* stx, void (*func) (xp_stx_t*,xp_word_t,void*), void* data);
 
 #ifdef __cplusplus
 }
diff --git a/ase/test/stx/parser.c b/ase/test/stx/parser.c
index f3c9d40a..4bca2c10 100644
--- a/ase/test/stx/parser.c
+++ b/ase/test/stx/parser.c
@@ -11,6 +11,7 @@
 #include <xp/stx/parser.h>
 #include <xp/stx/bootstrp.h>
 #include <xp/stx/class.h>
+#include <xp/stx/bytecode.h>
 
 #ifdef __linux
 #include <mcheck.h>
@@ -153,7 +154,13 @@ int xp_main (int argc, xp_char_t* argv[])
 		if (xp_stx_parser_parse_method (&parser, n, 
 			(void*)XP_TEXT("test.st")) == -1) {
 			xp_printf (XP_TEXT("parser error <%s>\n"), 
-			xp_stx_parser_error_string (&parser));
+				xp_stx_parser_error_string (&parser));
+		}
+
+		xp_printf (XP_TEXT("== Decoded Methods ==\n"));
+		if (xp_stx_decode(&stx, n) == -1) {
+			xp_printf (XP_TEXT("parser error <%s>\n"), 
+				xp_stx_parser_error_string (&parser));
 		}
 	}
 
diff --git a/ase/test/stx/stx.c b/ase/test/stx/stx.c
index d483e159..c6838bc4 100644
--- a/ase/test/stx/stx.c
+++ b/ase/test/stx/stx.c
@@ -15,12 +15,12 @@
 #include <xp/stx/class.h>
 #include <xp/stx/hash.h>
 
-void print_symbol_names (xp_stx_t* stx, xp_word_t sym)
+void print_symbol_names (xp_stx_t* stx, xp_word_t sym, void* unused)
 {
 	xp_printf (XP_TEXT("%lu [%s]\n"), (unsigned long)sym, &XP_STX_CHARAT(stx,sym,0));
 }
 
-void print_symbol_names_2 (xp_stx_t* stx, xp_word_t idx)
+void print_symbol_names_2 (xp_stx_t* stx, xp_word_t idx, void* unused)
 {
 	xp_word_t key = XP_STX_WORDAT(stx,idx,XP_STX_PAIRLINK_KEY);
 	xp_word_t value = XP_STX_WORDAT(stx,idx,XP_STX_PAIRLINK_VALUE);
@@ -167,10 +167,10 @@ int xp_main (int argc, xp_char_t* argv[])
 	xp_printf (XP_TEXT("stx.false %lu\n"), (unsigned long)stx.false);
 	xp_printf (XP_TEXT("-------------\n"));
 	
-	xp_stx_traverse_symbol_table (&stx, print_symbol_names);
+	xp_stx_traverse_symbol_table (&stx, print_symbol_names, XP_NULL);
 	xp_printf (XP_TEXT("-------------\n"));
 
-	xp_stx_hash_traverse (&stx, stx.smalltalk, print_symbol_names_2);
+	xp_stx_hash_traverse (&stx, stx.smalltalk, print_symbol_names_2, XP_NULL);
 	xp_printf (XP_TEXT("-------------\n"));
 
 	print_superclasses (&stx, XP_TEXT("Array"));
diff --git a/ase/test/stx/test.st b/ase/test/stx/test.st
index 57d415ff..ef5f573d 100644
--- a/ase/test/stx/test.st
+++ b/ase/test/stx/test.st
@@ -3,7 +3,7 @@ perform: method with: x with: y with: z with: a with: b with: c
 
 	| a b c d e f g |
 
-	< primitive: 10 >
+	< primitive: 21 >
 "
 	a := 'this is ''good'.
 	a := #xxx niceMethod.