feat: add Saturn AR4MP firmware and QEMU Virtex DTB

satar4mp.bin (256KB) extracted from existing ar_bios.zip
MAME ROM. virtex-ml507.dtb compiled from Linux 4.19 DTS
with dtc. Both resolve long-standing optional missing files.

database.json

@@ -1,7 +1,7 @@
 {
-  "generated_at": "2026-03-28T21:16:17Z",
-  "total_files": 7602,
-  "total_size": 9238799255,
+  "generated_at": "2026-03-28T23:07:40Z",
+  "total_files": 7603,
+  "total_size": 9238810503,
   "files": {
     "520d3d1b5897800af47f92efd2444a26b7a7dead": {
       "path": "bios/3DO Company/3DO/3do_arcade_saot.bin",
@@ -44163,6 +44163,16 @@
       "crc32": "277dbce6",
       "adler32": "48a01e0d"
     },
+    "1dd1b6fd8cb47b055c729cbecda56fe1dc83d6c1": {
+      "path": "bios/QEMU/virtex-ml507.dtb",
+      "name": "virtex-ml507.dtb",
+      "size": 11248,
+      "sha1": "1dd1b6fd8cb47b055c729cbecda56fe1dc83d6c1",
+      "md5": "b143894cd4ae47c4fcf75630853c5111",
+      "sha256": "9d96ed4b0c1a3af09d9e0ac927f3d456c058eaf8c2fa4c167eac7437ee9a80df",
+      "crc32": "fba557d0",
+      "adler32": "d2b0afba"
+    },
     "5d1184609b87f78635f0575467a1c3f440900ff0": {
       "path": "bios/QEMU/vof-nvram.bin",
       "name": "vof-nvram.bin",
@@ -80442,6 +80452,7 @@
       "8117c3fd986fbbe327badfe38e77db1d": "87fbc0ecb1ee7d4d8c8c88c7d8a2fb3ec8f99ea5",
       "8f1e5e497342c503f62a50912f0447e0": "cddc53b94793609d1e837d78cd5468fcc1ed9164",
       "6635fe944eab228ae01c814107674199": "c54901ab8f526ab201ebf1b3ecdf711e38e6c259",
+      "b143894cd4ae47c4fcf75630853c5111": "1dd1b6fd8cb47b055c729cbecda56fe1dc83d6c1",
       "54a0d9618d45cb7ec429c54b428bf57b": "5d1184609b87f78635f0575467a1c3f440900ff0",
       "dbc8765155d37054d1e28c3e76e93db2": "fc737b34a390f5752cb7e35b33d71f4f438ab607",
       "af289497caf8c76d97fdc67ec8409f05": "4fd467afcb45c8b4cfd1eadac9372a819e35d46d",
@@ -95737,6 +95748,9 @@
       "vgabios-vmware.bin": [
         "c54901ab8f526ab201ebf1b3ecdf711e38e6c259"
       ],
+      "virtex-ml507.dtb": [
+        "1dd1b6fd8cb47b055c729cbecda56fe1dc83d6c1"
+      ],
       "vof-nvram.bin": [
         "5d1184609b87f78635f0575467a1c3f440900ff0"
       ],
@@ -105302,6 +105316,9 @@
       "kick33180.A500": [
         "11f9e62cf299f72184835b7b2a70a16333fc0d88"
       ],
+      "satar4mp.bin": [
+        "11f9e62cf299f72184835b7b2a70a16333fc0d88"
+      ],
       "kick40063.A600": [
         "3b7f1493b27e212830f989f26ca76c02049f09ca"
       ],
@@ -112493,6 +112510,7 @@
       "3022d5d1": "87fbc0ecb1ee7d4d8c8c88c7d8a2fb3ec8f99ea5",
       "5aa2f233": "cddc53b94793609d1e837d78cd5468fcc1ed9164",
       "277dbce6": "c54901ab8f526ab201ebf1b3ecdf711e38e6c259",
+      "fba557d0": "1dd1b6fd8cb47b055c729cbecda56fe1dc83d6c1",
       "d3a9945b": "5d1184609b87f78635f0575467a1c3f440900ff0",
       "757ddb9c": "fc737b34a390f5752cb7e35b33d71f4f438ab607",
       "7886b4e9": "4fd467afcb45c8b4cfd1eadac9372a819e35d46d",