--- a/project_files/hwc/rtl/system.c	Fri Nov 09 23:05:28 2018 +0100
+++ b/project_files/hwc/rtl/system.c	Fri Nov 09 23:41:40 2018 +0100
@@ -358,7 +358,7 @@
     char *end;
     for(i = 0; i < len; i++)
     {
-        if((src[i] == 'x') || (src[i] == 'X')){
+        if(src[i] == '$'){
             // hex
             return strtol(src + i + 1, &end, 16);
         }