diff --git a/attic/tests/opcodes.usm b/attic/tests/opcodes.usm
deleted file mode 100644
index 59beb96..0000000
--- a/attic/tests/opcodes.usm
+++ /dev/null
@@ -1,163 +0,0 @@
-(
-	tests/opcodes : automated testing of opcodes
-
-	This file generates a lot of stack underflows on purpose:
-	it's handy to supress all the warning by piping through grep
-
-	| grep -vF 'Halted: Working-stack underflow'
-)
-
-;test { code 2 label 2 status 1 }
-;counts { failed 2 passed 2 unknown 2 }
-;number { started 1 }
-
-|0110 ;Console { vector 2 pad 6 char 1 byte 1 short 2 string 2 }
-|01F0 .RESET .FRAME .ERROR ( vectors )
-
-%PASS? { ,result JMP2 BRK2r LITr EOR2 DUP }
-%PASS { #01 PASS? }
-%FAIL { #00 PASS? }
-
-|0200
-
-@tests
-	ADD FAIL [ add-needs-two 00 ]
-	#01 ADD FAIL [ add-needs-two 00 ]
-	#01 #02 ADD #03 EQU PASS? [ add-result 00 ]
-	LITr [ fe ] STHr #fe EQU PASS? [ litr 00 ]
-	LIT2r [ fe dc ] STH2r #fedc EQU2 PASS? [ lit2r 00 ]
-	#01 #02 ADD #ff EQU PASS? [ this-test-fails 00 ]
-
-	,finish JMP2
-
-@RESET
-	,tests =test.code
-	,strings-start ,print-string JSR2
-	BRK
-	
-@ERROR BRK
-
-@FRAME
-	~test.status ,recover JNZ2
-	#01 =test.status
-	~test.code
-	DUP2 ,find-label JSR2
-		DUP2 =test.label
-		,find-code JSR2 =test.code
-	JMP2
-
-@find-label ( ptr₂ -- following-label-ptr₂ )
-	DUP2            PEK2 LIT BRK2r NEQ ^$next JNZ
-	DUP2 #0001 ADD2 PEK2 LIT LITr  NEQ ^$next JNZ
-	DUP2 #0002 ADD2 PEK2 LIT EOR2  NEQ ^$next JNZ
-	DUP2 #0003 ADD2 PEK2 LIT DUP   NEQ ^$next JNZ
-	#0004 ADD2 JMP2r
-
-	$next
-	#0001 ADD2 ^find-label JMP
-
-@find-code ( label-ptr₂ -- following-code-ptr₂ )
-	DUP2 PEK2
-	,$not-end JNZ2
-
-	$end
-	#0001 ADD2
-	JMP2r
-
-	$not-end
-	#0001 ADD2 ^find-code JMP
-
-@recover
-	( would it have been a PASS or FAIL? )
-	~test.label #000a SUB2 PEK2 LIT LIT EQU ,$clear JNZ2
-	#02 ^result JMP
-
-	$clear
-	( I would have executed a PASS or FAIL, so invert the result )
-	~test.label #0009 SUB2 PEK2 #00 EQU ^result JMP
-
-@result
-	DUP #02 MUL #00 SWP ,counts ADD2
-		DUP2 LDR2 #0001 ADD2 SWP2 STR2
-	#00 =test.status
-	,strings-test ^print-string JSR
-	#00 SWP ,strings-pass ,strings-fail SUB2 MUL2 ,strings-fail ADD2 ^print-string JSR
-	,strings-colon ^print-string JSR
-	~test.label ^print-string JSR
-	#0a =Console.char
-	POP #fc JMP
-	BRK
-
-@finish
-	,strings-finish ^print-string JSR
-	~counts.passed ^print-decimal JSR
-	,strings-passed ^print-string JSR
-	~counts.failed ^print-decimal JSR
-	,strings-failed ^print-string JSR
-	~counts.unknown ^print-decimal JSR
-	,strings-unknown ^print-string JSR
-	
-	( stop executing tests )
-	LIT BRK ,FRAME POK2
-	BRK
-
-@print-string ( string₂ -- )
-	DUP2 PEK2 DUP
-	,$not-end JNZ2
-
-	$end
-	POP POP2 JMP2r
-
-	$not-end
-	DUP LIT BRK2r EQU ,$end JNZ2
-	=Console.char
-	#0001 ADD2 ^print-string JMP
-
-@print-decimal ( short₂ -- )
-	#00 =number.started
-	DUP2 #2710 DIV2 DUP2 ^$digit JSR #2710 MUL2 SUB2
-	DUP2 #03e8 DIV2 DUP2 ^$digit JSR #03e8 MUL2 SUB2
-	DUP2 #0064 DIV2 DUP2 ^$digit JSR #0064 MUL2 SUB2
-	DUP2 #000a DIV2 DUP2 ^$digit JSR #000a MUL2 SUB2
-	^$digit JSR
-	~number.started #00 EQU JMP JMP2r
-	#30 =Console.char
-	JMP2r
-
-	$digit
-	SWP POP
-	DUP ~number.started ORA #02 JNZ
-	POP JMP2r
-	#30 ADD =Console.char
-	#01 =number.started
-	JMP2r
-
-@print-short ( short₂ -- )
-	#30 =Console.char
-	#78 =Console.char
-	DUP2 #000c SFT2 ^$digit JSR
-	DUP2 #0008 SFT2 ^$digit JSR
-	DUP2 #0004 SFT2 ^$digit JSR
-	                ^$digit JSR
-	JMP2r
-
-	$digit
-	#0f AND DUP #0a LTH #03 JNZ
-		#27 ADD
-	#30 ADD =Console.char
-	POP
-	JMP2r
-
-@strings
-	$start [ 0a Testing 20 started. 0a 0a 00 ]
-	$test [ Test 20 00 ]
-	$fail [ FAIL 00 ]
-	$pass [ pass 00 ]
-	      [ UNKNOWN 00 ]
-	$at [ at 20 00 ]
-	$colon [ : 20 00 ]
-	$finish [ 0a Testing 20 complete. 0a 00 ]
-	$passed [ 20 passed, 20 00 ]
-	$failed [ 20 failed, 20 00 ]
-	$unknown [ 20 were 20 unknown. 0a 00 ]
-
diff --git a/projects/examples/devices/console.usm b/projects/examples/devices/console.usm
index e809cab..0f8bf0e 100644
--- a/projects/examples/devices/console.usm
+++ b/projects/examples/devices/console.usm
@@ -6,11 +6,20 @@
 
 |10 @Console    [ &pad $8 &char $1 ]
 
+( variables )
+
+|0000
+
+@number [ &started $1 ]
+
 ( init )
 
 |0100 ( -> )
 	
 	;hello-word ;print JSR2
+	#ffff ;print-hexadecimal JSR2
+	;is-word ;print JSR2
+	#ffff ;print-decimal JSR2
 	
 BRK
 
@@ -19,9 +28,48 @@ BRK
 	&loop
 		( send ) DUP2 GET .Console/char DEO
 		( incr ) #0001 ADD2
-		( loop ) DUP2 GET #00 NEQ ,&loop JNZ
+		( loop ) DUP2 GET ,&loop JNZ
 	POP2
 
 RTN
 
-@hello-word "hello 20 "World!
+@print-hexadecimal ( short -- )
+	LIT '0 .Console/char DEO
+	LIT 'x .Console/char DEO
+	DUP2 #000c SFT2 ,&digit JSR
+	DUP2 #0008 SFT2 ,&digit JSR
+	DUP2 #0004 SFT2 ,&digit JSR
+	                ,&digit JSR
+RTN
+
+	&digit
+	#0f AND DUP #0a LTH ,&not-alpha JNZ
+		#27 ADD
+	&not-alpha
+	LIT '0 ADD .Console/char DEO
+	POP
+RTN
+
+@print-decimal ( short -- )
+	#00 .number/started POK
+	DUP2 #2710 DIV2 DUP2 ,&digit JSR #2710 MUL2 SUB2
+	DUP2 #03e8 DIV2 DUP2 ,&digit JSR #03e8 MUL2 SUB2
+	DUP2 #0064 DIV2 DUP2 ,&digit JSR #0064 MUL2 SUB2
+	DUP2 #000a DIV2 DUP2 ,&digit JSR #000a MUL2 SUB2
+	                     ,&digit JSR
+	.number/started PEK ,&end JNZ
+	LIT '0 .Console/char DEO
+	&end
+RTN
+
+	&digit
+	SWP POP
+	DUP .number/started PEK ORA #02 JNZ
+	POP JMP2r
+	LIT '0 ADD .Console/char DEO
+	#01 .number/started POK
+RTN
+
+@hello-word "hello 20 "World! 0a 00
+@is-word 20 "is 20 00
+