Index: misc/asm.py
===================================================================
--- misc/asm.py	(revision c091ef8bbbdafb4f2b81b0e11d486e522ef526be)
+++ misc/asm.py	(revision c091ef8bbbdafb4f2b81b0e11d486e522ef526be)
@@ -0,0 +1,47 @@
+#!/usr/bin/env python3
+
+import sys
+import re
+
+def convert_line(line):
+    if line == "*":
+        return ""
+
+    # |foo .equ *| -> |foo:|
+
+    m = re.match(r"^([a-z0-9_]+)\t+.equ\t+\*(.*)$", line)
+
+    if m != None:
+        lab = m.group(1) + ":"
+        com = m.group(2).strip()
+        line = lab + "\t\t\t\t\t"[len(lab) // 8:] + com
+
+    # |foo: dc.b '(...)'| -> |foo: dc.b "(...)"|
+
+    m = re.match(r"((?:^[a-z0-9]+:)?\t+dc.b\t+)'([^']+)'(.*)$", line)
+
+    if m != None:
+        line = m.group(1) + "\"" + m.group(2) + "\"" + m.group(3)
+
+    line = line.replace("*", "|")
+    line = line.replace("$", "0x")
+    line = line.replace(".equ", "=")
+    return line
+
+def convert(in_path, out_path):
+    lines = []
+
+    with open(in_path, "r") as f:
+        for line in f:
+            line = line.rstrip()
+            line = convert_line(line)
+            lines.append(line)
+
+    with open(out_path, "w") as f:
+        for line in lines:
+            print(line, file = f)
+
+if len(sys.argv) != 3:
+    raise Exception("usage: asm.py in-path out-path")
+
+convert(sys.argv[1], sys.argv[2])