diff --git a/grok.py b/grok.py
index e91e7a07..0cf631d9 100644
--- a/grok.py
+++ b/grok.py
@@ -9,26 +9,42 @@
 CELL=4*MHZ
 THRESH=2*CELL-MHZ//2
 
-b = bitarray()
-count, prev, run = 0, 128, 0
+class Bits:
+    def __init__(self):
+        self.b = bitarray()
+        self.prev, self.run = 128, 0
+    def process(self,line):
+        for i in range(6, len(line)-1, 3):
+            x = int(line[i:i+2], 16)
+            for j in range(8):
+                level = x & 128
+                if level != self.prev:
+                    self.prev = level
+                    if level == 0:
+                        while self.run > THRESH:
+                            self.b.append(False)
+                            self.run -= CELL
+                        self.b.append(True)
+                        self.run = 0
+                self.run += 1
+                x <<= 1
+        
+wdata = Bits()
+rdata = Bits()
+wreq = Bits()
+count = 0
 for line in f:
-    if count == 1000:
+    if count == 100000:
         break
-    if not line.startswith('RDATA'):
+    if line.startswith('WDATA'):
+        wdata.process(line)
+    elif line.startswith('RDATA'):
+        rdata.process(line)
+    elif line.startswith('/WREQ'):
+        wreq.process(line)
+    else:
         continue
     count += 1
-    for i in range(6, len(line)-1, 3):
-        x = int(line[i:i+2], 16)
-        for j in range(8):
-            level = x & 128
-            if level != prev:
-                prev = level
-                if level == 0:
-                    while run > THRESH:
-                        b.append(False)
-                        run -= CELL
-                    b.append(True)
-                    run = 0
-            run += 1
-            x <<= 1
-print(b)
+print(wdata.b)
+print(rdata.b)
+print(wreq.b)