diff --git a/flycast/component_manifest.json b/flycast/component_manifest.json
index 8c18a6bf..dc198294 100644
--- a/flycast/component_manifest.json
+++ b/flycast/component_manifest.json
@@ -20,8 +20,7 @@
         "md5": "e10c53c2f8b90bab96ead2d368858623",
         "system": "dreamcast",
         "description": "Dreamcast BIOS",
-        "paths": "$bios_path/dc",
-        "required": "Required"
+        "paths": "$bios_path/dc"
       },
       {
         "filename": "naomi.zip",
diff --git a/framework/component_manifest.json b/framework/component_manifest.json
index 63ca0956..2f920af1 100644
--- a/framework/component_manifest.json
+++ b/framework/component_manifest.json
@@ -365,6 +365,13 @@
           "command": {
             "zenity": "configurator_toggle_retroengine_event_scripts_dialog"
           }
+        },
+        {
+          "name": "BIOS Check on Launch",
+          "description": "Enable or disable: Warn before launching a game when its required BIOS files are missing.",
+          "command": {
+            "zenity": "configurator_bios_check_toggle_dialog"
+          }
         }
       ],
       "tools": [
diff --git a/retroarch/component_manifest.json b/retroarch/component_manifest.json
index eacb1dd6..665eee6e 100644
--- a/retroarch/component_manifest.json
+++ b/retroarch/component_manifest.json
@@ -5765,8 +5765,7 @@
         "md5": "e10c53c2f8b90bab96ead2d368858623",
         "system": "dreamcast",
         "description": "Dreamcast BIOS",
-        "paths": "$bios_path/dc",
-        "required": "Required"
+        "paths": "$bios_path/dc"
       },
       {
         "filename": "naomi.zip",
@@ -5775,7 +5774,7 @@
           "526eda1e2a7920c92c88178789d71d84"
         ],
         "system": "dreamcast",
-        "description": "Naomi BIOS",
+        "description": "NAOMI BIOS from MAME",
         "paths": "$bios_path/dc",
         "required": "Required, for arcade emulation"
       },
@@ -5788,7 +5787,7 @@
           "dfaae8d206ffb390ed1cf9529ccc123d"
         ],
         "system": "dreamcast",
-        "description": "Naomi 2 BIOS",
+        "description": "NAOMI 2 BIOS from MAME",
         "paths": "$bios_path/dc"
       },
       {
@@ -5812,7 +5811,7 @@
           "f4011d3116500354edf7302a90402711"
         ],
         "system": "dreamcast",
-        "description": "House of the Dead 2 Naomi BIOS",
+        "description": "NAOMI The House of the Dead 2 BIOS from MAME",
         "paths": "$bios_path/dc",
         "required": "Required, for that specific game"
       },
@@ -5823,7 +5822,7 @@
           "1028615bcac4c31634a3364ce5c04044"
         ],
         "system": "dreamcast",
-        "description": "Ferrari F355 Challenge Deluxe Naomi BIOS",
+        "description": "NAOMI Ferrari F355 Challenge (deluxe) BIOS from MAME",
         "paths": "$bios_path/dc",
         "required": "Required, for that specific game"
       },
@@ -5837,7 +5836,7 @@
           "dreamcast",
           "arcade"
         ],
-        "description": "Ferrari F355 Challenge Twin/Deluxe Naomi BIOS",
+        "description": "NAOMI Ferrari F355 Challenge (twin/deluxe) BIOS from MAME",
         "paths": "$bios_path/dc",
         "required": "Required, for that specific game"
       },
@@ -5851,7 +5850,7 @@
           "dreamcast",
           "arcade"
         ],
-        "description": "Airline Pilots Deluxe Naomi BIOS",
+        "description": "NAOMI Airline Pilots (deluxe) BIOS from MAME",
         "paths": "$bios_path/dc",
         "required": "Required, for that specific game"
       },
@@ -5865,10 +5864,18 @@
           "dreamcast",
           "arcade"
         ],
-        "description": "Atomiswave BIOS",
+        "description": "Atomiswave BIOS from MAME",
         "paths": "$bios_path/dc",
         "required": "Required, for arcade emulation"
       },
+      {
+        "filename": "segasp.zip",
+        "system": [
+          "dreamcast"
+        ],
+        "description": "System SP BIOS from MAME",
+        "paths": "$bios_path/dc"
+      },
       {
         "filename": "bios.sms",
         "md5": "840481177270d5642a14ca71ee72844c",
@@ -6557,7 +6564,6 @@
         "md5": "0a93f7940c455905bea6e392dfde92a4",
         "system": "dreamcast",
         "description": "Dreamcast flash BIOS",
-        "required": "Required",
         "paths": "$bios_path/dc"
       },
       {
@@ -6565,7 +6571,6 @@
         "md5": "0a93f7940c455905bea6e392dfde92a4",
         "system": "dreamcast",
         "description": "Dreamcast flash BIOS (duplicate of dc_flash.bin)",
-        "required": "Required",
         "paths": "$bios_path/dc"
       },
       {