diff --git a/README.md b/README.md
index 8017b43..7f19692 100644
--- a/README.md
+++ b/README.md
@@ -370,8 +370,8 @@ The AXI-lite interface follows the standard AXI4-lite protocol without `wstrb`,
 `awprot` and `arprot`.  At the system level, the address ranges for the 2 boxes
 are
 
-- 0x100000 - 0x1FFFFF for the 322MHz box, and
-- 0x200000 - 0x2FFFFF for the 250MHz box.
+- 0x100000 - 0x1FFFFF for the 250MHz box, and
+- 0x200000 - 0x2FFFFF for the 322MHz box.
 
 The 250MHz and 322MHz AXI4-stream interfaces have slightly different semantics.
 The 250MHz interface has the following signals.
diff --git a/plugin/p2p/box_250mhz/box_250mhz_address_map.v b/plugin/p2p/box_250mhz/box_250mhz_address_map.v
index 1bf6ae3..c627f28 100644
--- a/plugin/p2p/box_250mhz/box_250mhz_address_map.v
+++ b/plugin/p2p/box_250mhz/box_250mhz_address_map.v
@@ -17,7 +17,7 @@
 // *************************************************************************
 // Address map for the box running at 250MHz (through PCI-e BAR2 1MB)
 //
-// System-level address range: 0x40000 - 0xFFFFF
+// System-level address range: 0x100000 - 0x1FFFFF
 //
 // --------------------------------------------------
 //   BaseAddr |  HighAddr |  Module
diff --git a/plugin/p2p/box_322mhz/box_322mhz_address_map.v b/plugin/p2p/box_322mhz/box_322mhz_address_map.v
index 087b46a..300c1bd 100644
--- a/plugin/p2p/box_322mhz/box_322mhz_address_map.v
+++ b/plugin/p2p/box_322mhz/box_322mhz_address_map.v
@@ -17,7 +17,7 @@
 // *************************************************************************
 // Address map for the box running at 322MHz (through PCI-e BAR2 1MB)
 //
-// System-level address range: 0x10000 - 0x3FFFF
+// System-level address range: 0x200000 - 0x2FFFFF
 //
 // --------------------------------------------------
 //   BaseAddr |  HighAddr |  Module