fix: map pc-8801, dsi and cd-i system slugs

platforms/_shared.yml

@@ -195,8 +195,11 @@ shared_groups:
       destination: quasi88/N88EXT3.ROM
       required: true
       md5: "fc4b76a402ba501e6ba6de4b3e8b4273"
-    # Alternative naming from libretro docs (lowercase, _N suffix)
-    # ref: quasi88/src/libretro.c — core accepts both conventions
+    # N88EXT0-3.ROM above are the mkII SR extension ROMs that match N88.ROM
+    # (MAME pc8801mk2sr: 710a63ec, c0bd2aa6, af2b6efa, 7713c519). The core
+    # reads N88EXTn.ROM before n88_n.rom (src/LIBRETRO/libretro.c:109-112),
+    # so they win over the n88_n.rom dumps System.dat pairs with that main ROM,
+    # which come from other models (n88_0 61984bab is the original PC-8801's).
     - name: n88_0.rom
       destination: quasi88/n88_0.rom
       required: false

platforms/retroarch.yml

@@ -1552,7 +1552,7 @@ systems:
     docs: "https://docs.libretro.com/library/np2kai/"
     includes:
     - np2kai
-  nec---pc-8801:
+  nec-pc-88:
     files:
     - name: n88_0.rom
       destination: quasi88/n88_0.rom
@@ -1645,6 +1645,11 @@ systems:
       native_system: NEC - PC-8801
       native_path: quasi88/n88knj2.rom
     native_id: NEC - PC-8801
+    core: quasi88
+    manufacturer: NEC
+    docs: "https://docs.libretro.com/library/quasi88/"
+    includes:
+    - quasi88
   nec-pc-fx:
     files:
     - name: fx-scsi.rom
@@ -2005,7 +2010,7 @@ systems:
     core: desmume
     manufacturer: Nintendo
     docs: "https://docs.libretro.com/library/desmume/"
-  nintendo---nintendo-dsi:
+  nintendo-dsi:
     files:
     - name: dsi_bios7.bin
       destination: dsi_bios7.bin
@@ -2367,7 +2372,7 @@ systems:
       size: 1024
       native_system: Phillips - Videopac+
     native_id: Phillips - Videopac+
-  philips---cd-i:
+  philips-cdi:
     files:
     - name: cdimono1.zip
       destination: cdimono1.zip
@@ -4721,12 +4726,6 @@ systems:
     core: scummvm
     manufacturer: Various
     docs: "https://docs.libretro.com/library/scummvm/"
-  nec-pc-88:
-    includes:
-    - quasi88
-    core: quasi88
-    manufacturer: NEC
-    docs: "https://docs.libretro.com/library/quasi88/"
   xrick:
     files:
     - name: data.zip