diff --git a/emulators/ssf.yml b/emulators/ssf.yml
index 0dd191c8..b0dde7a5 100644
--- a/emulators/ssf.yml
+++ b/emulators/ssf.yml
@@ -75,7 +75,7 @@ files:
     hle_fallback: true
     size: 524288
     description: "Saturn BIOS"
-    note: "Any dump of the 512 KiB console ROM, the compatible machines included. Area code is chosen by [Peripheral] Areacode and AutoAreacode, not by the image, so no region selects this file."
+    note: "Any dump of the 512 KiB console ROM, the compatible machines included. Area code is chosen by [Peripheral] Areacode and AutoAreacode, not by the image, so no region selects this file. Each alias labels one of those dumps: mpr-17933.bin, sega_100.bin, sega_100a.bin, sega1003.bin, hisaturn.bin and vsaturn.bin."
     source_ref: "SSF.exe 0x43d770 (SaturnBIOS 0x129b1f8), SSF.exe 0x129a2f8 with the filter at 0x129a310, SSF.exe 0x43ff96 (NoBIOS 0x129b4cc), libnative-lib.so SSF::CStateSaveBase::_GetBIOSHash 0x134b8ec-0x134b924, SSF-archive Document/Readme.txt BIOSファイルについて"
 
   - name: "epr-20091.ic8"
diff --git a/emulators/ymir.yml b/emulators/ymir.yml
index 35cf6600..19fc4143 100644
--- a/emulators/ymir.yml
+++ b/emulators/ymir.yml
@@ -63,6 +63,7 @@ files:
     validation: [size]
     aliases: [mpr-17933.bin, saturn_bios.bin]
     description: "Saturn IPL ROM (BIOS). Any region accepted."
+    note: "The libretro port reads sega_101.bin, mpr-17933.bin and saturn_bios.bin from its system directory (kBiosFilenames)."
     source_ref:
       standalone: "apps/ymir-sdl3/src/util/rom_loader.cpp:9-22, apps/ymir-sdl3/src/app/rom_manager.cpp:14-53, libs/ymir-core/include/ymir/sys/memory_defs.hpp:9"
       libretro: "apps/ymir-libretro/src/libretro.cpp:305-309, apps/ymir-libretro/src/libretro.cpp:651-690, apps/ymir-libretro/src/libretro.cpp:692-703"