fc: use hkrom for mmc6

ares/fc/cartridge/board/hvc-hkrom.cpp

@@ -31,8 +31,9 @@ struct HVC_HKROM : Interface {  //MMC6
     if(!(characterAddress & 0x1000) && (address & 0x1000)) {
       if(irqDelay == 0) {
         if(irqCounter == 0) {
-          irqCounter = irqLatch;
-        } else if(--irqCounter == 0) {
+          irqCounter = irqLatch + 1;
+        }
+        if(--irqCounter == 0) {
           if(irqEnable) irqLine = 1;
         }
       }
@@ -64,6 +65,7 @@ struct HVC_HKROM : Interface {  //MMC6
   }
 
   auto writePRG(n32 address, n8 data) -> void override {
+    if(address == 0x2006 && ++characterLatch) irqTest(data << 8);
     if(address < 0x7000) return;
 
     if(address < 0x8000) {
@@ -179,6 +181,7 @@ struct HVC_HKROM : Interface {  //MMC6
     s(irqEnable);
     s(irqDelay);
     s(irqLine);
+    s(characterLatch);
     s(characterAddress);
   }
 
@@ -194,7 +197,8 @@ struct HVC_HKROM : Interface {  //MMC6
   n8  irqLatch;
   n8  irqCounter;
   n1  irqEnable;
-  n1  irqDelay;
+  n8  irqDelay;
   n1  irqLine;
+  n1  characterLatch;
   n16 characterAddress;
 };

mia/Database/Famicom.bml

@@ -17994,6 +17994,56 @@ game
       content: Character
       volatile
 
+game
+  sha256: 7ff16ac31650db5d353a7c77349e916c71cd104b3fb8e97df3d9da35af248644
+  name:   StarTropics (Europe)
+  title:  StarTropics (Europe)
+  region: PAL
+  board:  HVC-HKROM
+    chip
+      type: MMC6
+    memory
+      type: ROM
+      size: 0x10
+      content: iNES
+    memory
+      type: ROM
+      size: 0x40000
+      content: Program
+    memory
+      type: RAM
+      size: 0x400
+      content: Save
+    memory
+      type: ROM
+      size: 0x40000
+      content: Character
+
+game
+  sha256: 69de2c7552fa81ca5921da0e457abf1be35f18ffbad159788a76141be59c9f6b
+  name:   StarTropics (USA)
+  title:  StarTropics (USA)
+  region: NTSC-U
+  board:  HVC-HKROM
+    chip
+      type: MMC6
+    memory
+      type: ROM
+      size: 0x10
+      content: iNES
+    memory
+      type: ROM
+      size: 0x40000
+      content: Program
+    memory
+      type: RAM
+      size: 0x400
+      content: Save
+    memory
+      type: ROM
+      size: 0x40000
+      content: Character
+
 game
   sha256: 2ce85b82b427de187b59b62d33081497acfa2010ef38660b157f8eb008336e6e
   name:   Stick Hunter - Exciting Ice Hockey (Japan)
@@ -21045,6 +21095,31 @@ game
       size: 0x2000
       content: Character
 
+game
+  sha256: d0850075065ecbd125a33accc952de5d012527be45aa14a1b8223a9adf1643ae
+  name:   Zoda's Revenge - StarTropics II (USA)
+  title:  Zoda's Revenge - StarTropics II (USA)
+  region: NTSC-U
+  board:  HVC-HKROM
+    chip
+      type: MMC6
+    memory
+      type: ROM
+      size: 0x10
+      content: iNES
+    memory
+      type: ROM
+      size: 0x40000
+      content: Program
+    memory
+      type: RAM
+      size: 0x400
+      content: Save
+    memory
+      type: ROM
+      size: 0x40000
+      content: Character
+
 game
   sha256: 6f5190caa0ef0a6e815ac044fbbba970a6aea4ef4899ddc46047dad08aedc984
   name:   Zoids - Chuuou Tairiku no Tatakai (Japan)

mia/medium/famicom.cpp

@@ -173,14 +173,9 @@ auto Famicom::analyzeINES(vector<u8>& data) -> string {
     break;
 
   case   4:
-    //MMC3
     s += "  board:  HVC-TLROM\n";
     s += "    chip type=MMC3B\n";
     prgram = 8192;
-    //MMC6
-  //s += "  board:  HVC-HKROM\n";
-  //s += "    chip type=MMC6\n";
-  //prgram = 1024;
     break;
 
   case   5: