diff --git a/regs/us_disassemble.py b/regs/us_disassemble.py
index e01e61f..2ae6a37 100644
--- a/regs/us_disassemble.py
+++ b/regs/us_disassemble.py
@@ -1,5 +1,5 @@
+import sys
 import parse_bits
-from pprint import pprint
 from collections import OrderedDict
 from os import path
 
@@ -55,34 +55,6 @@ def parse_registers():
 registers = dict(parse_registers())
 US_CMN_INST = registers["US_CMN_INST"]
 
-code = [
-    0x00078005,
-    0x08020080,
-    0x08020080,
-    0x1c9b04d8,
-    0x1c810003,
-    0x00000005,
-]
-
-# DCL IN[0].xyz, GENERIC[0], PERSPECTIVE
-# DCL OUT[0], COLOR
-# IMM[0] FLT32 {    1.0000,     0.0000,     0.0000,     0.0000}
-#   0: MOV OUT[0].xyz, IN[0].xyzx
-#   1: MOV OUT[0].w, IMM[0].xxxx
-#   2: END
-# Radeon Compiler Program
-#  0: src0.xyz = input[0]
-#     MAX color[0].xyz (OMOD DISABLE), src0.xyz, src0.xyz
-#     MAX color[0].w (OMOD DISABLE), src0.1, src0.1
-code = [
-    0x00078005,
-    0x08020000,
-    0x08020080,
-    0x1c440220,
-    0x1cc18003,
-    0x00000005,
-]
-
 def get_field(n, descriptor):
     if type(descriptor.bits) is int:
         return (n >> descriptor.bits) & 1
@@ -117,8 +89,11 @@ def disassemble(code, ix):
     def inner(register_name_list):
         for i, register_name in enumerate(register_name_list):
             value = code[ix + i]
-            register = registers[register_name]
             print(" ", f"{value:08x}", register_name)
+            if register_name == 0:
+                assert value == 0
+                continue
+            register = registers[register_name]
             for d in register.values():
                 field_pv_name = get_field_pv_name(value, d)
                 print("   ", d.field_name.ljust(max_length), field_pv_name)
@@ -133,4 +108,14 @@ def disassemble(code, ix):
     else:
         assert False, inst_type
 
-disassemble(code, 0)
+def parse_hex(s):
+    assert s.startswith('0x')
+    return int(s.removeprefix('0x'), 16)
+
+if __name__ == "__main__":
+    filename = sys.argv[1]
+    with open(filename) as f:
+        buf = f.read()
+    code = [parse_hex(c.strip()) for c in buf.split(',') if c.strip()]
+    for i in range(len(code) // 6):
+        disassemble(code, i * 6)
diff --git a/shader_examples/mesa/texture.vs.txt b/shader_examples/mesa/texture.vs.txt
new file mode 100644
index 0000000..a9005e8
--- /dev/null
+++ b/shader_examples/mesa/texture.vs.txt
@@ -0,0 +1,8 @@
+0x00302203,
+0x01f90021,
+0x01248021,
+0x01248021,
+0x00f00203,
+0x01510001,
+0x01248001,
+0x01248001,