diff --git a/ase/stx/bytecode.c b/ase/stx/bytecode.c
index 31147f22..4a2317e4 100644
--- a/ase/stx/bytecode.c
+++ b/ase/stx/bytecode.c
@@ -1,5 +1,5 @@
 /*
- * $Id: bytecode.c,v 1.3 2005-07-07 16:52:48 bacon Exp $
+ * $Id: bytecode.c,v 1.4 2005-07-08 11:32:50 bacon Exp $
  */
 #include <xp/stx/bytecode.h>
 #include <xp/stx/class.h>
@@ -41,15 +41,15 @@ static const xp_char_t* opcode_names[] =
 	XP_TEXT("PUSH_LITERAL_VARIABLE"),
 	XP_TEXT("STORE_VARIABLE"),
 	XP_TEXT("STORE_TEMPORARY"),
+	XP_TEXT("SEND"),
+	XP_TEXT("JUMP"),
 	XP_TEXT("DO_SPECIAL"),
 	XP_TEXT("DO_PRIMITIVE"),
-	XP_TEXT("UNKNOWN"),
-	XP_TEXT("UNKNOWN"),
 	XP_TEXT("PUSH_VARIABLE_EXTENDED"),
 	XP_TEXT("PUSH_TEMPORARY_EXTENDED"),
+	XP_TEXT("STORE_VARIABLE_EXTENDED"),
 	XP_TEXT("STORE_TEMPORARY_EXTENDED"),
-	XP_TEXT("UNKNOWN"),
-	XP_TEXT("UNKNOWN"),
+	XP_TEXT("DO_SPECIAL_EXTENDED"),
 	XP_TEXT("DO_PRIMITIVE_EXTENDED")
 };
 
diff --git a/ase/stx/bytecode.h b/ase/stx/bytecode.h
index 00b03574..8ca2f1b7 100644
--- a/ase/stx/bytecode.h
+++ b/ase/stx/bytecode.h
@@ -1,5 +1,5 @@
 /*
- * $Id: bytecode.h,v 1.4 2005-07-07 16:52:48 bacon Exp $
+ * $Id: bytecode.h,v 1.5 2005-07-08 11:32:50 bacon Exp $
  */
 
 #ifndef _XP_STX_BYTECODE_H_
@@ -7,18 +7,35 @@
 
 #include <xp/stx/stx.h>
 
-#define PUSH_VARIABLE           0x0
-#define PUSH_TEMPORARY          0x1
-#define PUSH_LITERAL_CONSTANT   0x2
-#define PUSH_LITERAL_VARIABLE   0x3
-#define STORE_VARIABLE          0x4
-#define STORE_TEMPORARY         0x5
-#define DO_SPECIAL              0x6
-#define DO_PRIMITIVE            0x7
-#define PUSH_VARIABLE_EXTENDED  0xA
-#define PUSH_TEMPORARY_EXTENDED 0xB
+#define PUSH_RECEIVER_VARIABLE     0x00
+#define PUSH_RECEIVER_VARIABLE_BIG 0x10
+
+#define PUSH_VARIABLE            0x0
+#define PUSH_TEMPORARY           0x1
+#define PUSH_LITERAL_CONSTANT    0x2
+#define PUSH_LITERAL_VARIABLE    0x3
+#define STORE_VARIABLE           0x4
+#define STORE_TEMPORARY          0x5
+#define SEND                     0x6
+#define JUMP                     0x7
+#define DO_SPECIAL               0x8
+#define DO_PRIMITIVE             0x9
+#define PUSH_VARIABLE_EXTENDED   0xA
+#define PUSH_TEMPORARY_EXTENDED  0xB
 #define STORE_TEMPORARY_EXTENDED 0xC
-#define DO_PRIMITIVE_EXTENDED   0xF
+#define STORE_VARIABLE_EXTENDED  0xD
+#define DO_SPECIAL_EXTENDED      0xE
+#define DO_PRIMITIVE_EXTENDED    0xF
+
+#define RETURN_RECEIVER      1
+#define RETURN_NIL           2
+#define RETURN_TRUE          3
+#define RETURN_FALSE         4
+#define RETURN_FROM_MESSAGE  5
+#define RETURN_FROM_BLOCK    6
+
+#define PUSH_VARIABLE(i)    ((i <= 0x0F)?  (i): 
+#define PUSH_VARIABLE(i)     i
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/ase/stx/parser.c b/ase/stx/parser.c
index 7c3f00ba..7fd8e8c5 100644
--- a/ase/stx/parser.c
+++ b/ase/stx/parser.c
@@ -1,5 +1,5 @@
 /*
- * $Id: parser.c,v 1.58 2005-07-07 16:52:48 bacon Exp $
+ * $Id: parser.c,v 1.59 2005-07-08 11:32:50 bacon Exp $
  */
 
 #include <xp/stx/parser.h>
@@ -34,6 +34,9 @@ static int __parse_basic_expression (
 	xp_stx_parser_t* parser, const xp_char_t* ident);
 static int __parse_primary (
 	xp_stx_parser_t* parser, const xp_char_t* ident);
+static int __parse_primary_ident (
+	xp_stx_parser_t* parser, const xp_char_t* ident);
+
 static int __parse_block_constructor (xp_stx_parser_t* parser);
 static int __parse_message_continuation (xp_stx_parser_t* parser);
 static int __parse_keyword_message (xp_stx_parser_t* parser);
@@ -255,6 +258,42 @@ static INLINE int __emit_code (xp_stx_parser_t* parser, xp_byte_t code)
 	return 0;
 }
 
+static INLINE int __emit_push_receiver_variable (xp_stx_parser_t* parser, int pos)
+{
+	if (pos > 0xFF)
+
+	if (pos > 0x0F) EMIT_CODE (parser, PUSH_RECEIVER_VARIABLE | (pos & 0x0F));
+	else EMIT_CODE (parser, PUSH_RECEIVER_VARIABLE_BIG, pos);
+	return 0;
+}
+
+/*
+push_receiver_variable,
+push_temporary_location,
+push_literal_constant,
+push_literal_variable,
+store_receiver_variable,
+store_temporary_location,
+push_receiver,
+push_true,
+push_false,
+push_nil,
+push_minus_one,
+push_zero,
+push_one,
+push_two,
+return_receiver,
+return_true,
+return_false,
+return_nil,
+return_from_message,
+return_from_block,
+XP_NULL,
+push_receiver_variable,
+push_temporary_location,
+push_literal_constant,
+push_literal_variable,
+*/
 
 int xp_stx_parser_parse_method (
 	xp_stx_parser_t* parser, xp_word_t method_class, void* input)
@@ -622,7 +661,17 @@ static int __parse_statement (xp_stx_parser_t* parser)
 	if (parser->token.type == XP_STX_TOKEN_RETURN) {
 		GET_TOKEN (parser);
 		if (__parse_expression(parser) == -1) return -1;
-		EMIT_CODE_TEST (parser, XP_TEXT("RETURN"), XP_TEXT("stack top"));
+
+		/* TODO */
+		if (RETURN_FROM_MESSAGE <= 0x0F)  {
+			EMIT_CODE_TEST (parser, XP_TEXT("DO_SPECIAL"), XP_TEXT("RETURN_FROM_MESSAGE"));
+			EMIT_CODE (parser, (DO_SPECIAL << 4) | RETURN_FROM_MESSAGE);
+		}
+		else {
+			EMIT_CODE_TEST (parser, XP_TEXT("DO_SPECIAL_EXTENDED"), XP_TEXT("RETURN_FROM_MESSAGE"));
+			EMIT_CODE (parser, (DO_SPECIAL_EXTENDED << 4) | (RETURN_FROM_MESSAGE & 0x0F));
+			EMIT_CODE (parser, RETURN_FROM_MESSAGE >> 4);
+		}
 	}
 	else {
 		if (__parse_expression(parser) == -1) return -1;
@@ -722,13 +771,26 @@ xp_sprintf (buf, xp_countof(buf), XP_TEXT("%d"), i);
 xp_char_t buf[100];
 		if (__parse_expression(parser) == -1) return -1;
 xp_sprintf (buf, xp_countof(buf), XP_TEXT("%d"), i);
-		EMIT_CODE_TEST (parser, XP_TEXT("ASSIGN_INSTANCE"), buf);
+
+		/* TODO */
+		if (i <= 0x0F)  {
+			EMIT_CODE_TEST (parser, XP_TEXT("STORE_VARIABLE"), buf);
+			EMIT_CODE (parser, (STORE_VARIABLE << 4) | i);
+		}
+		else {
+			EMIT_CODE_TEST (parser, XP_TEXT("STORE_VARIABLE_EXTENDED"), buf);
+			EMIT_CODE (parser, (STORE_VARIABLE_EXTENDED << 4) | (i & 0x0F));
+			EMIT_CODE (parser, i >> 4);
+		}
+
 		return 0;
 	}
 
 	if (xp_stx_lookup_class_variable (
 		stx, parser->method_class, target) != stx->nil) {
 		if (__parse_expression(parser) == -1) return -1;
+
+		/* TODO */
 		EMIT_CODE_TEST (parser, XP_TEXT("ASSIGN_CLASSVAR #"), target);
 		return 0;
 	}
@@ -751,8 +813,7 @@ static int __parse_primary (xp_stx_parser_t* parser, const xp_char_t* ident)
 
 	if (ident == XP_NULL) {
 		if (parser->token.type == XP_STX_TOKEN_IDENT) {
-			/* TODO - check what this identifier is and generate proper code*/
-			EMIT_CODE_TEST (parser, XP_TEXT("PUSH_IDENT"), parser->token.name.buffer);
+			if (__parse_primary_ident (parser, parser->token.buffer) == -1) return -1;
 			GET_TOKEN (parser);
 		}
 		else if (parser->token.type == XP_STX_TOKEN_CHARLIT) {
@@ -793,13 +854,45 @@ static int __parse_primary (xp_stx_parser_t* parser, const xp_char_t* ident)
 		}
 	}
 	else {
-		/* TODO - check what this identifier is and generate proper code*/
-		EMIT_CODE_TEST (parser, XP_TEXT("PUSH_IDENT"), ident);
+		if (__parse_primary_ident (parser, parser->token.buffer) == -1) return -1;
 	}
 
 	return 0;
 }
 
+static int __parse_primary_ident (xp_stx_parser_t* parser, const xp_char_t* ident)
+{
+	xp_word_t i;
+
+	/* Refer to __parse_assignment for identifier lookup */
+
+	for (i = 0; i < parser->temporary_count; i++) {
+		if (xp_strcmp (target, parser->temporaries[i]) == 0) {
+			EMIT_CODE_1 (parser, PUSH_TEMPORARY_VARIABLE, i);
+			return 0;
+		}
+	}
+
+	if (xp_stx_get_instance_variable_index (
+		stx, parser->method_class, target, &i) == 0) {
+		EMIT_CODE_1 (parser, PUSH_RECEIVER_VARIABLE, i);
+		return 0;
+	}	
+
+	if (xp_stx_lookup_class_variable (
+		stx, parser->method_class, target) != stx->nil) {
+		//PUSH_CLASS_VARIABLE
+		return 0;
+	}
+
+	/* TODO: IMPLEMENT POOL DICTIONARIES */
+
+	/* TODO: IMPLEMENT GLOBLAS, but i don't like this idea */
+
+	parser->error_code = XP_STX_PARSER_ERROR_UNDECLARED_NAME;
+	return -1;
+}
+
 static int __parse_block_constructor (xp_stx_parser_t* parser)
 {
 	/*
@@ -1294,3 +1387,4 @@ static int __close_input (xp_stx_parser_t* parser)
 
 	return 0;
 }
+
diff --git a/ase/stx/stx.txt b/ase/stx/stx.txt
index d1de7843..1c6d0d4e 100644
--- a/ase/stx/stx.txt
+++ b/ase/stx/stx.txt
@@ -79,8 +79,93 @@ AssignInstance
 AssignTemporary
 */
 
-#define PUSH_VARIABLE   0x01
-#define PUSH_ARGUMENT   0x02
-#define PUSH_TEMPORARY  0x03
-#define PUSH_LITERAL    0x04
+0x              push instance variable x
+1x              store instance variable x
+2x              push local x
+3x              store local x
+40..43 xx       jump forward by xxx
+44..47 xx       jump backward by xxx
+48..4F xx       (reserved)
+50..53 xx       jump forward if true by xxx
+54..57 xx       jump backward if true by xxx
+58..5B xx       jump forward if false by xxx
+5C..5F xx       jump backward if false by xxx
+60 xx           fetch inst var xx of stack top
+61 xx           store stack top inst var xx of stack level 2
+62..6F          (reserved)
+7x yyyy         send self yyyy, x args
+8x yyyy         send yyyy, x args
+9x yyyy         send super yyyy, x args
+Ax yy           send self yy, x args
+
+B0 xx           push object xx
+B1 xxxx         push object xxxx
+B2 xx           get instvar xx of next outer receiver
+B3 xx           store instvar xx of next outer receiver 
+B4 xx           get next outer local x
+B5 xx           store next outer local
+B6 xx yy        get (y th) outer local
+B7 xx yy        store (y th) outer local
+B8              nonlocal block return, next outer context
+B9 xx           make full block
+BA xx           make hybrid block
+BB xx yy        get instvar xx of yyth outer receiver
+BC xx yy        store instvar xx of yyth outer receiver 
+BD xx           nonlocal block return, distance xx
+BE              push next outer receiver
+BF xx           push xxth outer receiver
+
+Cx              send special selector:
+                        0: <=
+                        1: >=
+                        2: <
+                        3: >
+                        4: ==
+                        5: ~~
+                        6: not
+                        7: +
+                        8: -
+                        9: basicAt:
+                        A: basicAt:put:
+                        B: isNil
+                        C: notNil
+                        D: (reserved)
+                        E: (reserved)
+                        F: (reserved)
+
+Dx yy           send yy to stack top, xx args
+
+E0              pop stack
+E1              duplicate stacktop
+E2              duplicate level 2
+E3              return stack top
+E4              return true
+E5              return false
+E6              return nil
+E7              return self
+E8              push false
+E9              push true
+EA              push nil
+EB              push self
+EC xx           push negative integer
+ED xx           push positive integer
+EE xxxx         push negative integer
+EF xxxx         push positive integer
+
+F0 xx           push instvar xx
+F1 xx           store instvar xx
+F2 xx           push local xx
+F3 xx           store local xx
+F4 xx           push global xx
+F5 xx           store global xx
+F6 xx           push Character xx
+F7              add 1
+F8              subtract 1
+F9              push thisContext
+FA              (reserved)
+FB              
+FC              
+FD              
+FE xx           primitive xx
+FF              extended op
 
diff --git a/ase/test/stx/test.st b/ase/test/stx/test.st
index 54e8141d..630fe87f 100644
--- a/ase/test/stx/test.st
+++ b/ase/test/stx/test.st
@@ -14,4 +14,5 @@ perform: method with: x with: y with: z with: a1 with: b2 with: c2
 	"Win32Errors := 10."
 
 	(jjj xxx: 10 xy) zzz: (10 fuck: 20 you: 40) yyy:  kkk.
-	[ spec plus:  20]
+	[ spec plus:  20].
+	^10.