From 46f0dfeb93951f4f85fbbace32845a385048dea8 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?=E6=AD=90=E6=AD=AA?= Date: Tue, 22 Sep 2026 21:08:19 +0800 Subject: [PATCH] doc: 15693 V3 finalize erases the whole tag memory The notes said block 0x15 reads back as 69 E2 5D 00 after finalize. It reads back as 00 00 00 00, and so does every other block. Co-Authored-By: Claude Opus 5 --- doc/magic_cards_notes.md | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/doc/magic_cards_notes.md b/doc/magic_cards_notes.md index d3f49444a..584d73dba 100644 --- a/doc/magic_cards_notes.md +++ b/doc/magic_cards_notes.md @@ -2716,7 +2716,7 @@ V3: blocks `0x14` and `0x15` hold a signature while the tag is not finalized. ``` hf 15 raw -ac -d 022014 # A5 2B 44 2C -hf 15 raw -ac -d 022015 # 21 AE 93 00 (69 E2 5D 00 after finalize) +hf 15 raw -ac -d 022015 # 21 AE 93 00 (00 00 00 00 after finalize) ``` @@ -2765,7 +2765,8 @@ hf 15 raw -acw -d 02211077665544 hf 15 raw -acw -d 022111332211E0 ``` -Finalize locks the UID for good and can't be undone, block `0x15` changes to `69 E2 5D 00`: +Finalize locks the UID for good and can't be undone. It also erases the whole tag +memory, every block reads back as `00000000` afterwards: ``` hf 15 raw -acw -d 022114A52B442C