diff --git a/_web_server/server/playground-server.scm b/_web_server/server/playground-server.scm
index ee47771..c218e63 100755
--- a/_web_server/server/playground-server.scm
+++ b/_web_server/server/playground-server.scm
@@ -303,8 +303,8 @@
 
       (with-output-to-file command-file
         (lambda ()
-          (println "~a" verilog-file)
           (println "~a" metatop-file)
+          (println "~a" verilog-file)
           (println "+define+TESTBENCH")
           (println "+timescale+1ps/1ps"))))
     work-dir))
@@ -504,7 +504,7 @@
 ;;;
 (define (make-page-handler host root index-file
                            work-base stor-base
-                           max-code-size
+                           max-code-size sanitize
                            iverilog-wrap vvp-wrap
                            verilator-wrap verilator-sim-wrap verilator-build-jobs)
 
@@ -629,7 +629,7 @@
 
             (make-response
              (exec-sim 'iverilog
-                       (sanitize-verilog code)
+                       (if sanitize (sanitize-verilog code) code)
                        work-base
                        TOP-MODULE
                        #:metatop iverilog-metatop
@@ -646,7 +646,7 @@
 
             (make-response
              (exec-sim 'verilator
-                       (sanitize-verilog code)
+                       (if sanitize (sanitize-verilog code) code)
                        work-base
                        TOP-MODULE
                        #:verilator-wrap verilator-wrap
@@ -716,6 +716,7 @@
         (-> "  --verilator-sim-wrap PATH   Verilator simulation executable wrapper.")
         (-> "  --verilator-build-jobs N    Verilator parallel build.")
         (-> "  --max-len LEN               Set maximum code size in symbols. Default: 0 (infinite)")
+        (-> "  --dont-sanitize             Do not sanitize verilog code (dangerous)")
         (-> "  --work-base PATH            Set work base path. Default: ./")
         (-> "  --stor-base PATH            Set snippets storage path. Default: ./")
         (-> "  --log-level LEVEL           Set log level from 0 (quiet) to 10 (verbose). Default: 1./")
@@ -743,6 +744,7 @@
                     '(("verilator-sim-wrap") required)
                     '(("verilator-build-jobs") required)
                     '(("max-len") required)
+                    '(("dont-sanitize") none)
                     '(("work-base") required)
                     '(("stor-base") required)
                     '(("log-level") required)
@@ -758,6 +760,7 @@
           (verilator-sim-wrap (string-trim-if-string (option-get opts "verilator-sim-wrap")))
           (verilator-build-jobs (string->number (string-trim (or (option-get opts "verilator-build-jobs") "0"))))
           (max-code-size (string->number (string-trim (or (option-get opts "max-len") "0"))))
+          (sanitize (not (option-get opts "dont-sanitize")))
           (work-base (string-trim (or (option-get opts "work-base") "./")))
           (stor-base (string-trim (or (option-get opts "stor-base") "./")))
           (log-level (string->number (string-trim (or (option-get opts "log-level") "1")))))
@@ -782,6 +785,7 @@
         (logger LOG-INFO "verilator simulator wrapper: '~a'" verilator-sim-wrap)
         (logger LOG-INFO "verilator build jobs: ~a" verilator-build-jobs)
         (logger LOG-INFO "Max code size: ~a" max-code-size)
+        (logger LOG-INFO "Sanitize code: ~a" sanitize)
         (logger LOG-INFO "Work base path: '~a'" work-base)
         (logger LOG-INFO "Storage base path: '~a'" stor-base)
         (logger LOG-INFO "Log level: '~a'" log-level)
@@ -789,7 +793,7 @@
         (run-server
          (make-page-handler host root INDEX-FILE
                             work-base stor-base
-                            max-code-size
+                            max-code-size sanitize
                             iverilog-wrap vvp-wrap
                             verilator-wrap verilator-sim-wrap verilator-build-jobs)
          'http `(#:host ,addr #:port ,port)))))))