diff --git a/CLAUDE.md b/CLAUDE.md
index 915f8b9..a98e333 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -174,7 +174,8 @@ Backends: `spi_flash.c` (fmc100), `spi_flash_hisfc350.c` (V1-era parts),
   env, rest ubi), whose mtdparts/bootcmd/bootargs come from the U-Boot default
   env; `NAND_LAYOUT` is the legacy split layout for other chips. The
   `NOR_SPLIT_SOCS` (gk7205v200 family, hi3516cv6xx, hi3519dv500,
-  hi3516cv300/ev100; keyed by
+  hi3516cv300/ev100, hi3516ev200/hi3518ev300/hi3516dv200 but not
+  hi3516ev300; keyed by
   package board, `FIRMWARE_PACKAGE_BOARD` maps cv608/cv610/cv613 to
   `hi3516cv6xx` and hi3516dv500 to `hi3519dv500`) install the split NOR
   package: one `firmware.bin.<board>` where the boot area ends (0x50000;
diff --git a/src/defib/firmware.py b/src/defib/firmware.py
index 6ed066d..319ebeb 100644
--- a/src/defib/firmware.py
+++ b/src/defib/firmware.py
@@ -87,6 +87,9 @@
     "gk7202v300", "gk7205v200", "gk7205v300", "gk7605v100",
     "hi3516cv6xx", "hi3519dv500",
     "hi3516cv300", "hi3516ev100",
+    # Not hi3516ev300: its kernel fills the 2 MiB slot, so its firmware
+    # ships fixed slots only.
+    "hi3516ev200", "hi3518ev300", "hi3516dv200",
 })
 
 # NOR boot area -- (boot partition size, env partition size) -- where it is
diff --git a/tests/test_install_nor_split.py b/tests/test_install_nor_split.py
index d0e0df6..e37a2ec 100644
--- a/tests/test_install_nor_split.py
+++ b/tests/test_install_nor_split.py
@@ -353,7 +353,8 @@ def test_package_board_and_boot_area_are_data():
     assert package_board("gk7205v210") == "gk7205v200"
     assert "hi3516cv6xx" in split_boards("hi3516cv608")
     for chip in ("hi3516cv608", "hi3516cv610", "hi3516cv613", "hi3519dv500",
-                 "hi3516dv500", "gk7205v200", "hi3516cv300", "hi3516ev100"):
+                 "hi3516dv500", "gk7205v200", "hi3516cv300", "hi3516ev100",
+                 "hi3516ev200", "hi3518ev300", "hi3516dv200"):
         assert supports_nor_split(chip), chip
     assert nor_boot_area("hi3516cv300") == (0x40000, 0x10000)
     assert not supports_nor_split("hi3516ev300")