diff --git a/README.md b/README.md
index a37e3d3..62e0e42 100644
--- a/README.md
+++ b/README.md
@@ -188,3 +188,4 @@ Memory Map
 | 0xa0910000 | ?????????? | ?????????? | ??????????????????????????????????? |
 | 0xa0920000 | ?????????? | ?????????? | AHB DMA block                       |
 | 0xa3300000 | 0xa33a0000 | ?????????? | Bluetooth things                    |
+| 0xfff00000 | 0xffffffff |   0x100000 | Boot ROM, mirrored each 64K (its real size) |