diff --git a/papers/export-tech.md b/papers/export-tech.md
index 3bf715469..560aab324 100644
--- a/papers/export-tech.md
+++ b/papers/export-tech.md
@@ -4,6 +4,13 @@
 
 TODO
 
+## macro data
+
+read length, loop and then release (1 byte).
+if it is a 2-byte macro, read a dummy byte.
+
+then read data.
+
 ## pattern data
 
 read sequentially.