diff --git a/beautiful-racket/br/demo/hdl/#Not2.hdl.rkt#1# b/beautiful-racket/br/demo/hdl/#Not2.hdl.rkt#1#
deleted file mode 100644
index b0cd3c1..0000000
--- a/beautiful-racket/br/demo/hdl/#Not2.hdl.rkt#1#
+++ /dev/null
@@ -1,259 +0,0 @@
-#reader(lib"read.ss""wxme")WXME0108 ## 
-#|
-   This file uses the GRacket editor format.
-   Open this file in DrRacket version 6.4.0.15 or later to read it.
-
-   Most likely, it was created by saving a program in DrRacket,
-   and it probably contains a program with non-text elements
-   (such as images or comment boxes).
-
-            http://racket-lang.org/
-|#
- 22 7 #"wxtext\0"
-3 1 6 #"wxtab\0"
-1 1 8 #"wximage\0"
-2 0 8 #"wxmedia\0"
-4 1 34 #"(lib \"syntax-browser.ss\" \"mrlib\")\0"
-1 0 16 #"drscheme:number\0"
-3 0 44 #"(lib \"number-snip.ss\" \"drscheme\" \"private\")\0"
-1 0 36 #"(lib \"comment-snip.ss\" \"framework\")\0"
-1 0 93
-(
- #"((lib \"collapsed-snipclass.ss\" \"framework\") (lib \"collapsed-sni"
- #"pclass-wxme.ss\" \"framework\"))\0"
-) 0 0 43 #"(lib \"collapsed-snipclass.ss\" \"framework\")\0"
-0 0 19 #"drscheme:sexp-snip\0"
-0 0 36 #"(lib \"cache-image-snip.ss\" \"mrlib\")\0"
-1 0 68
-(
- #"((lib \"image-core.ss\" \"mrlib\") (lib \"image-core-wxme.rkt\" \"mr"
- #"lib\"))\0"
-) 1 0 29 #"drscheme:bindings-snipclass%\0"
-1 0 101
-(
- #"((lib \"ellipsis-snip.rkt\" \"drracket\" \"private\") (lib \"ellipsi"
- #"s-snip-wxme.rkt\" \"drracket\" \"private\"))\0"
-) 2 0 88
-(
- #"((lib \"pict-snip.rkt\" \"drracket\" \"private\") (lib \"pict-snip.r"
- #"kt\" \"drracket\" \"private\"))\0"
-) 0 0 34 #"(lib \"bullet-snip.rkt\" \"browser\")\0"
-0 0 25 #"(lib \"matrix.ss\" \"htdp\")\0"
-1 0 22 #"drscheme:lambda-snip%\0"
-1 0 29 #"drclickable-string-snipclass\0"
-0 0 26 #"drracket:spacer-snipclass\0"
-0 0 57
-#"(lib \"hrule-snip.rkt\" \"macro-debugger\" \"syntax-browser\")\0"
-1 0 1 6 #"wxloc\0"
-          0 0 63 0 1 #"\0"
-0 75 1 #"\0"
-0 12 90 -1 90 -1 3 -1 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 255 255 255 1 -1 0 9
-#"Standard\0"
-0 75 15 #"Triplicate T3c\0"
-0 16 90 -1 90 -1 3 -1 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 255 255 255 1 -1 2 1
-#"\0"
-0 -1 1 #"\0"
-1 0 -1 -1 -1 -1 -1 -1 0 0 0 0 0 0 1 1 1 1 1 1 0 0 0 0 0 0 -1 -1 2 24
-#"framework:default-color\0"
-0 -1 1 #"\0"
-1 0 -1 -1 -1 -1 -1 -1 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 255 255 255 -1 -1 2
-1 #"\0"
-0 -1 1 #"\0"
-1 0 -1 -1 -1 -1 -1 -1 0 0 0 0 0 0 0 0 0 1 1 1 150 0 150 0 0 0 -1 -1 2 15
-#"text:ports out\0"
-0 -1 1 #"\0"
-1 0 -1 -1 -1 -1 -1 -1 0 0 0 0 0 0 0 0 0 1 1 1 34 119 34 0 0 0 -1 -1 2 1
-#"\0"
-0 -1 1 #"\0"
-1.0 0 -1 -1 93 -1 -1 -1 0 0 0 0 0 0 0 0 0 1.0 1.0 1.0 255 0 0 0 0 0 -1
--1 2 15 #"text:ports err\0"
-0 -1 1 #"\0"
-1 0 -1 -1 -1 -1 -1 -1 0 0 0 0 0 0 0 0 0 1 1 1 136 17 17 0 0 0 -1 -1 2 1
-#"\0"
-0 -1 1 #"\0"
-1 0 -1 -1 -1 -1 -1 -1 0 0 0 0 0 0 0 0 0 1 1 1 0 0 175 0 0 0 -1 -1 2 17
-#"text:ports value\0"
-0 -1 1 #"\0"
-1 0 -1 -1 -1 -1 -1 -1 0 0 0 0 0 0 0 0 0 1 1 1 34 34 119 0 0 0 -1 -1 2 1
-#"\0"
-0 -1 1 #"\0"
-1.0 0 92 -1 -1 -1 -1 -1 0 0 0 0 0 0 0 0 0 1.0 1.0 1.0 34 139 34 0 0 0 -1
--1 2 27 #"Matching Parenthesis Style\0"
-0 -1 1 #"\0"
-1.0 0 92 -1 -1 -1 -1 -1 0 0 0 0 0 0 0 0 0 1.0 1.0 1.0 34 139 34 0 0 0 -1
--1 2 1 #"\0"
-0 -1 1 #"\0"
-1 0 -1 -1 -1 93 -1 -1 0 1 0 0 0 0 0 0 0 1 1 1 38 38 128 0 0 0 -1 -1 2 37
-#"framework:syntax-color:scheme:symbol\0"
-0 -1 1 #"\0"
-1 0 -1 -1 -1 -1 -1 -1 0 0 0 0 0 0 0 0 0 1 1 1 34 34 119 0 0 0 -1 -1 2 38
-#"framework:syntax-color:scheme:keyword\0"
-0 -1 1 #"\0"
-1 0 -1 -1 -1 -1 -1 -1 0 0 0 0 0 0 0 0 0 1 1 1 34 34 119 0 0 0 -1 -1 2 1
-#"\0"
-0 -1 1 #"\0"
-1 0 -1 -1 -1 93 -1 -1 0 1 0 0 0 0 0 0 0 1 1 1 194 116 31 0 0 0 -1 -1 2
-38 #"framework:syntax-color:scheme:comment\0"
-0 -1 1 #"\0"
-1 0 -1 -1 -1 -1 -1 -1 0 0 0 0 0 0 0 0 0 1 1 1 119 34 119 0 0 0 -1 -1 2 1
-#"\0"
-0 -1 1 #"\0"
-1 0 -1 -1 -1 93 -1 -1 0 1 0 0 0 0 0 0 0 1 1 1 41 128 38 0 0 0 -1 -1 2 37
-#"framework:syntax-color:scheme:string\0"
-0 -1 1 #"\0"
-1 0 -1 -1 -1 -1 -1 -1 0 0 0 0 0 0 0 0 0 1 1 1 34 119 34 0 0 0 -1 -1 2 35
-#"framework:syntax-color:scheme:text\0"
-0 -1 1 #"\0"
-1 0 -1 -1 -1 -1 -1 -1 0 0 0 0 0 0 0 0 0 1 1 1 34 119 34 0 0 0 -1 -1 2 39
-#"framework:syntax-color:scheme:constant\0"
-0 -1 1 #"\0"
-1 0 -1 -1 -1 -1 -1 -1 0 0 0 0 0 0 0 0 0 1 1 1 34 119 34 0 0 0 -1 -1 2 1
-#"\0"
-0 -1 1 #"\0"
-1 0 -1 -1 -1 93 -1 -1 0 1 0 0 0 0 0 0 0 1 1 1 132 60 36 0 0 0 -1 -1 2 49
-#"framework:syntax-color:scheme:hash-colon-keyword\0"
-0 -1 1 #"\0"
-1 0 -1 -1 -1 -1 -1 -1 0 0 0 0 0 0 0 0 0 1 1 1 34 119 34 0 0 0 -1 -1 2 42
-#"framework:syntax-color:scheme:parenthesis\0"
-0 -1 1 #"\0"
-1 0 -1 -1 -1 -1 -1 -1 0 0 0 0 0 0 0 0 0 1 1 1 0 178 178 0 0 0 -1 -1 2 1
-#"\0"
-0 -1 1 #"\0"
-1 0 -1 -1 -1 93 -1 -1 0 1 0 0 0 0 0 0 0 1 1 1 255 0 0 0 0 0 -1 -1 2 36
-#"framework:syntax-color:scheme:error\0"
-0 -1 1 #"\0"
-1 0 -1 -1 -1 -1 -1 -1 0 0 0 0 0 0 0 0 0 1 1 1 136 17 17 0 0 0 -1 -1 2 1
-#"\0"
-0 -1 1 #"\0"
-1 0 -1 -1 -1 93 -1 -1 0 1 0 0 0 0 0 0 0 1 1 1 0 0 0 0 0 0 -1 -1 2 36
-#"framework:syntax-color:scheme:other\0"
-0 -1 1 #"\0"
-1 0 -1 -1 -1 -1 -1 -1 0 0 0 0 0 0 0 0 0 1 1 1 34 34 119 0 0 0 -1 -1 2 16
-#"Misspelled Text\0"
-0 -1 1 #"\0"
-1 0 -1 -1 -1 -1 -1 -1 0 0 0 0 0 0 0 0 0 1 1 1 0 0 0 0 0 0 -1 -1 2 1
-#"\0"
-0 -1 1 #"\0"
-1 0 -1 -1 -1 93 -1 -1 0 1 0 0 0 0 0 0 0 1 1 1 81 112 203 0 0 0 -1 -1 2
-38 #"drracket:check-syntax:lexically-bound\0"
-0 -1 1 #"\0"
-1 0 -1 -1 -1 93 -1 -1 0 1 0 0 0 0 0 0 0 1 1 1 81 112 203 0 0 0 -1 -1 2 1
-#"\0"
-0 -1 1 #"\0"
-1 0 -1 -1 -1 93 -1 -1 0 1 0 0 0 0 0 0 0 1 1 1 178 34 34 0 0 0 -1 -1 2 28
-#"drracket:check-syntax:set!d\0"
-0 -1 1 #"\0"
-1 0 -1 -1 -1 -1 -1 -1 0 0 0 0 0 0 0 0 0 1 1 1 136 17 17 0 0 0 -1 -1 2 37
-#"drracket:check-syntax:unused-require\0"
-0 -1 1 #"\0"
-1 0 -1 -1 -1 -1 -1 -1 0 0 0 0 0 0 0 0 0 1 1 1 136 17 17 0 0 0 -1 -1 2 36
-#"drracket:check-syntax:free-variable\0"
-0 -1 1 #"\0"
-1 0 -1 -1 -1 -1 -1 -1 0 0 0 0 0 0 0 0 0 1 1 1 136 17 17 0 0 0 -1 -1 2 1
-#"\0"
-0 -1 1 #"\0"
-1 0 -1 -1 -1 93 -1 -1 0 1 0 0 0 0 0 0 0 1 1 1 68 0 203 0 0 0 -1 -1 2 31
-#"drracket:check-syntax:imported\0"
-0 -1 1 #"\0"
-1 0 -1 -1 -1 93 -1 -1 0 1 0 0 0 0 0 0 0 1 1 1 68 0 203 0 0 0 -1 -1 2 47
-#"drracket:check-syntax:my-obligation-style-pref\0"
-0 -1 1 #"\0"
-1 0 -1 -1 -1 93 -1 -1 0 1 0 0 0 0 0 0 0 1 1 1 178 34 34 0 0 0 -1 -1 2 1
-#"\0"
-0 -1 1 #"\0"
-1 0 -1 -1 -1 93 -1 -1 0 1 0 0 0 0 0 0 0 1 1 1 0 116 0 0 0 0 -1 -1 2 50
-#"drracket:check-syntax:their-obligation-style-pref\0"
-0 -1 1 #"\0"
-1 0 -1 -1 -1 93 -1 -1 0 1 0 0 0 0 0 0 0 1 1 1 0 116 0 0 0 0 -1 -1 2 48
-#"drracket:check-syntax:unk-obligation-style-pref\0"
-0 -1 1 #"\0"
-1 0 -1 -1 -1 93 -1 -1 0 1 0 0 0 0 0 0 0 1 1 1 0 0 0 0 0 0 -1 -1 2 1
-#"\0"
-0 -1 1 #"\0"
-1 0 -1 -1 -1 93 -1 -1 0 1 0 0 0 0 0 0 0 1 1 1 139 142 28 0 0 0 -1 -1 2
-49 #"drracket:check-syntax:both-obligation-style-pref\0"
-0 -1 1 #"\0"
-1 0 -1 -1 -1 93 -1 -1 0 1 0 0 0 0 0 0 0 1 1 1 139 142 28 0 0 0 -1 -1 2
-37 #"plt:module-language:test-coverage-on\0"
-0 -1 1 #"\0"
-1 0 -1 -1 -1 93 -1 -1 0 1 0 0 0 0 0 0 0 1 1 1 0 0 0 0 0 0 -1 -1 2 1
-#"\0"
-0 -1 1 #"\0"
-1 0 -1 -1 -1 93 -1 -1 0 1 0 0 0 1 0 0 0 0 0 0 255 165 0 0 0 0 -1 -1 2 38
-#"plt:module-language:test-coverage-off\0"
-0 -1 1 #"\0"
-1 0 -1 -1 -1 93 -1 -1 0 1 0 0 0 1 0 0 0 0 0 0 255 165 0 0 0 0 -1 -1 4 1
-#"\0"
-0 71 1 #"\0"
-1.0 0 -1 -1 -1 -1 -1 -1 0 0 0 0 0 0 1.0 1.0 1.0 1.0 1.0 1.0 0 0 0 0 0 0
--1 -1 4 1 #"\0"
-0 -1 1 #"\0"
-1.0 0 -1 -1 -1 -1 -1 -1 1 0 0 0 0 0 0 0 0 1.0 1.0 1.0 0 0 255 0 0 0 -1
--1 4 1 #"\0"
-0 71 1 #"\0"
-1.0 0 -1 -1 -1 -1 -1 -1 1 0 0 0 0 0 0 0 0 1.0 1.0 1.0 0 0 255 0 0 0 -1
--1 4 1 #"\0"
-0 71 1 #"\0"
-1.0 0 -1 -1 -1 -1 -1 -1 0 0 0 0 0 0 0 0 0 1.0 1.0 1.0 0 100 0 0 0 0 -1
--1 2 1 #"\0"
-0 -1 1 #"\0"
-1 0 -1 -1 -1 -1 -1 -1 0 0 0 0 0 0 0 0 0 1 1 1 200 0 0 0 0 0 -1 -1 4 1
-#"\0"
-0 -1 1 #"\0"
-1.0 0 92 -1 -1 -1 -1 -1 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 255 255 0 -1 -1 0
-1 #"\0"
-0 75 1 #"\0"
-1.0 0 -1 -1 -1 -1 -1 -1 0 0 0 0 0 0 1.0 1.0 1.0 1.0 1.0 1.0 0 0 0 0 0 0
--1 -1 2 1 #"\0"
-0 75 1 #"\0"
-1.0 0 -1 -1 -1 -1 -1 -1 0 0 0 0 0 0 1.0 1.0 1.0 1.0 1.0 1.0 0 0 0 0 0 0
--1 -1 2 1 #"\0"
-0 75 1 #"\0"
-1.0 0 -1 -1 -1 -1 -1 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 255 255 255 -1 -1
-2 1 #"\0"
-0 75 1 #"\0"
-1.0 0 -1 -1 -1 -1 -1 -1 0 0 0 0 0 0 0 0 0 0 0 0 34 139 34 255 255 255 -1
--1 2 1 #"\0"
-0 -1 1 #"\0"
-1.0 0 92 -1 -1 -1 -1 -1 0 0 0 0 0 0 0 0 0 1.0 1.0 1.0 36 36 140 0 0 0 -1
--1 2 1 #"\0"
-0 -1 1 #"\0"
-1.0 0 92 -1 -1 -1 -1 -1 0 0 0 0 0 0 1.0 1.0 1.0 1.0 1.0 1.0 0 0 0 0 0 0
--1 -1 2 1 #"\0"
-0 -1 1 #"\0"
-0 4 -1 -1 -1 -1 -1 -1 0 0 0 0 0 0 1.0 1.0 1.0 1.0 1.0 1.0 0 0 0 0 0 0 -1
--1 2 1 #"\0"
-0 75 1 #"\0"
-1.0 0 92 -1 -1 -1 -1 -1 0 0 0 0 0 0 0 0 0 1.0 1.0 1.0 36 36 140 0 0 0 -1
--1 2 1 #"\0"
-0 75 1 #"\0"
-1.0 0 92 -1 -1 -1 -1 -1 0 0 0 0 0 0 1.0 1.0 1.0 1.0 1.0 1.0 0 0 0 0 0 0
--1 -1 2 1 #"\0"
-0 75 1 #"\0"
-0 4 -1 -1 -1 -1 -1 -1 0 0 0 0 0 0 1.0 1.0 1.0 1.0 1.0 1.0 0 0 0 0 0 0 -1
--1           0 25 0 28 3 17 #"#lang br/demo/hdl"
-0 0 24 29 1 #"\n"
-0 0 24 29 1 #"\n"
-0 0 14 3 4 #"CHIP"
-0 0 24 3 1 #" "
-0 0 14 3 3 #"Not"
-0 0 24 3 2 #" {"
-0 0 24 29 1 #"\n"
-0 0 24 3 10 #"          "
-0 0 14 3 2 #"IN"
-0 0 24 3 1 #" "
-0 0 14 3 1 #"x"
-0 0 28 3 1 #","
-0 0 24 3 1 #" "
-0 0 14 3 1 #"y"
-0 0 28 3 1 #","
-0 0 24 3 1 #" "
-0 0 14 3 1 #"z"
-0 0 17 3 1 #";"
-0 0 24 29 1 #"\n"
-0 0 24 3 1 #"}"
-0 0 24 29 1 #"\n"
-0 0 24 29 1 #"\n"
-0 0 24 29 1 #"\n"
-0 0 24 29 1 #"\n"
-0           0
diff --git a/beautiful-racket/br/demo/hdl/Not2.hdl.rkt b/beautiful-racket/br/demo/hdl/Not2.hdl.rkt
index 54080a6..7bfe1ce 100644
--- a/beautiful-racket/br/demo/hdl/Not2.hdl.rkt
+++ b/beautiful-racket/br/demo/hdl/Not2.hdl.rkt
@@ -1,7 +1,7 @@
 #lang br/demo/hdl
 
 CHIP Not {
-          IN x;
+          IN x, y, z;
 }
 
 
diff --git a/beautiful-racket/br/demo/hdl/expander.rkt b/beautiful-racket/br/demo/hdl/expander.rkt
index 4e4aa4c..2620f01 100644
--- a/beautiful-racket/br/demo/hdl/expander.rkt
+++ b/beautiful-racket/br/demo/hdl/expander.rkt
@@ -1,26 +1,9 @@
 #lang br
-(provide #%module-begin #%top-interaction #%top #%app #%datum module+ require chip)
+(provide (all-from-out br) (all-defined-out))
 
-
-(define #'(chip _Chip
-                (_input-pin ...)
-                (_output-pin)
-                ((_Part [_pin-in _val-id] ... [out _pin-out]) ...))
+;; todo: extract identifiers from _pin-spec
+;; and introduce them
+(define #'(chip-program "CHIP" _id "{" _pin-spec "}")
   #'(begin
-      (provide _Chip)
-      (define _Chip
-        (make-keyword-procedure
-         (λ (kws kw-args . rest)
-           (define kw-pairs (map cons kws kw-args))
-           (let ([_input-pin (cdr (assq (string->keyword (format "~a" '_input-pin)) kw-pairs))] ...)
-             (define _pin-out (call-part _Part [_pin-in _val-id] ...)) ...
-             _output-pin))))))
-
-
-(define #'(call-part _Part [_pin-in _val-id] ...)
-  (with-syntax ([part-path (format "~a.hdl" (syntax->datum #'_Part))]
-                [(kw ...) (map (λ(pi) (string->keyword (format "~a" (syntax->datum pi)))) (syntax->list #'(_pin-in ...)))])
-    #'(let ()
-        (local-require (rename-in part-path [_Part local-name]))
-        (keyword-apply local-name '(kw ...) (list _val-id ...) null))))
-
+      (define _id 0)
+      ))
\ No newline at end of file
diff --git a/beautiful-racket/br/demo/hdl/parser.rkt b/beautiful-racket/br/demo/hdl/parser.rkt
index 1955cee..7dc003f 100644
--- a/beautiful-racket/br/demo/hdl/parser.rkt
+++ b/beautiful-racket/br/demo/hdl/parser.rkt
@@ -1,21 +1,13 @@
 #lang ragg
 
-chip-program : "CHIP" chip-name "{" in-pin-spec "}"
+chip-program : "CHIP" ID "{" pin-spec "}"
 
-chip-name : ID
+pin-spec : ("IN" | "OUT") pin-list ";"
 
-in-pin-spec : "IN" pin-list ";"
-
-out-pin-spec : "OUT" pin-list ";"
-
-pin-list : pin ["," pin-list]
-
-pin : ID
+pin-list : ID ["," pin-list]
 
 part-spec : "PARTS:" part+
 
 part : ID "(" part-arg-list ")" ";"
 
-part-arg-list : part-arg ["," part-arg-list]
-
-part-arg : ID "=" ID
\ No newline at end of file
+part-arg-list : ID "=" ID ["," part-arg-list]
\ No newline at end of file
diff --git a/beautiful-racket/br/demo/hdl/reader.rkt b/beautiful-racket/br/demo/hdl/reader.rkt
index a6bf51f..fd8264c 100644
--- a/beautiful-racket/br/demo/hdl/reader.rkt
+++ b/beautiful-racket/br/demo/hdl/reader.rkt
@@ -1,6 +1,7 @@
 #lang br
 (require br/reader-utils "parser.rkt" "tokenizer.rkt")
 
-(define-read-and-read-syntax (source-path input-port)
-  #`(module hdl-mod br/demo/hdl/expander
-      #,(parse source-path (tokenize input-port))))
+(provide read-syntax)
+(define (read-syntax source-path input-port)
+  (strip-context #`(module hdl-mod br/demo/hdl/expander
+                     #,(parse source-path (tokenize input-port)))))