feat: add emulator profiles (119-series batch 6 partial)

dolphin_launcher (stub launcher), oberon (RISC, bootloader embedded),
17 test cores (00_example through vidtest), 17 game/utility cores
(2048 through vaporspec), bennugd, boytacean, emux_chip8, fake08,
jaxe, lowresnx, opentyrian, openlara, squirreljme, vitaquake2, xrick

182 total profiles. 6 agents failed (API 500), will retry.

emulators/gam4980.yml

@@ -0,0 +1,78 @@
+emulator: GAM4980
+type: libretro
+source: "https://github.com/ThisBoringWorld/gam4980"
+cores:
+  - gam4980
+systems:
+  - bbk-longman-4980
+
+# GAM4980 is a BBK Longman 4980 electronic dictionary game emulator for
+# libretro. Original code from https://codeberg.org/iyzsong/gam4980, based
+# on the BA4988 BBK simulator by Wuyun.
+#
+# The device uses a 6502-based CPU with banked ROM access.
+#
+# ROM loading (src/libretro.c:1171-1177, retro_init):
+#   The core gets the RetroArch system directory via RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY,
+#   appends "/gam4980" to build the ROM directory path, then calls sys_init(romdir).
+#
+# sys_init (src/libretro.c:693-723):
+#   Opens romdir/8.BIN and reads 0x200000 bytes (2 MB) into sys.rom_8 (font ROM).
+#   Opens romdir/E.BIN and reads 0x200000 bytes (2 MB) into sys.rom_e (OS ROM).
+#   Both files are mandatory -- no fallback, no error handling. The core will
+#   crash if either file is missing.
+#
+# Memory map (src/libretro.c:109-110, 300-305):
+#   0x800000-0x9FFFFF  rom_8 (font ROM, 8.BIN)
+#   0xE00000-0xFFFFFF  rom_e (OS ROM, E.BIN)
+#   These ROMs must be dumped from a physical BBK Longman 4980 dictionary.
+#
+# The .info file does not declare firmware entries. The core is marked
+# is_experimental = true.
+
+notes: |
+  Place 8.BIN and E.BIN in the RetroArch system/gam4980/ subdirectory.
+  Both files must be 2 MB dumps from a BBK Longman 4980 dictionary:
+    8.BIN - font ROM, dumped from address range 0x800000-0x9FFFFF
+    E.BIN - OS ROM, dumped from address range 0xE00000-0xFFFFFF
+  The core will crash without these files (no error handling in sys_init).
+  Game files use the .gam extension.
+
+files:
+  - name: "gam4980/8.BIN"
+    size: 2097152
+    md5: ddfc001a6859d63ed46368ea7fe9f20c
+    sha1: 062067e6d661c3d3e10d910435be4a59db1bee9f
+    required: true
+    system: bbk-longman-4980
+    bundled: false
+    note: "Font ROM (2 MB). Loaded at 0x800000. Dumped from physical device (src/libretro.c:716-718)."
+    source_ref: "src/libretro.c:716"
+
+  - name: "gam4980/E.BIN"
+    size: 2097152
+    md5: 72a16fd0d2453108321edc65cd347c77
+    sha1: b486b6eda5cd7e79bb5605d1fbe36eb88bfc6724
+    required: true
+    system: bbk-longman-4980
+    bundled: false
+    note: "OS ROM (2 MB). Loaded at 0xE00000. Dumped from physical device (src/libretro.c:720-722)."
+    source_ref: "src/libretro.c:720"
+
+platform_details:
+  bios_mapping:
+    target: "0x800000-0x9FFFFF (font), 0xE00000-0xFFFFFF (OS) in banked address space"
+    source_ref: "src/libretro.c:109-110, 300-305"
+    notes: |
+      sys.rom_8 and sys.rom_e are flat 2 MB arrays. The CPU accesses them
+      through bank-switched memory (PA() macro resolves virtual to physical
+      address). rom_8_vread and rom_e_vread handle indirect reads via
+      the banking system.
+
+  load_path:
+    source_ref: "src/libretro.c:1173-1177"
+    notes: |
+      retro_init() builds the path as {system_directory}/gam4980/ and
+      passes it to sys_init(). Files must be named exactly 8.BIN and
+      E.BIN (case sensitive on Linux). No .info firmware declarations
+      exist, so RetroArch won't warn about missing files at scan time.