added E7 support for 12K ROMs

src/debugger/gui/CartE7Widget.cxx

@@ -30,13 +30,16 @@ CartridgeE7Widget::CartridgeE7Widget(
   ostringstream info;
 
   info << "E7 cartridge, "
-    << (myCart.romBankCount() == 4 ? "four" : "eight")
+    << (myCart.romBankCount() == 4 ? "four"
+        : myCart.romBankCount() == 6 ? "six" : "eight")
     << " 2K banks ROM + 2K RAM, \n"
     << "  mapped into three segments\n"
     << "Lower 2K accessible @ $F000 - $F7FF\n"
     << (myCart.romBankCount() == 4
-        ? "  ROM banks 0 - 2 (hotspots $FFE4 to $FFE6)\n"
+        ? "  ROM banks 0 - 2 (hotspots $FFE4 - $FFE6)\n"
-        : "  ROM Banks 0 - 6 (hotspots $FFE0 to $FFE6)\n")
+        : myCart.romBankCount() == 6
+          ? "  ROM Banks 0 - 4 (hotspots $FFE0/$FFE1\n    and $FFE4 - $FFE6)\n"
+          : "  ROM Banks 0 - 6 (hotspots $FFE0 - $FFE6)\n")
     << "  1K RAM bank 3 (hotspot $FFE7)\n"
     << "    $F400 - $F7FF (R), $F000 - $F3FF (W)\n"
     << "256B RAM accessible @ $F800 - $F9FF\n"
@@ -205,6 +208,10 @@ const char* CartridgeE7Widget::getSpotLower(int idx)
   static constexpr std::array<const char*, 4> spot_lower_8K = {
     "#0 - ROM ($FFE4)", "#1 - ROM ($FFE5)", "#2 - ROM ($FFE6)", "#3 - RAM ($FFE7)"
   };
+  static constexpr std::array<const char*, 6> spot_lower_12K = {
+    "#0 - ROM ($FFE0)", "#1 - ROM ($FFE1)",
+    "#2 - ROM ($FFE4)", "#3 - ROM ($FFE5)", "#4 - ROM ($FFE6)", "#5 - RAM ($FFE7)"
+  };
   static constexpr std::array<const char*, 8> spot_lower_16K = {
     "#0 - ROM ($FFE0)", "#1 - ROM ($FFE1)", "#2 - ROM ($FFE2)", "#3 - ROM ($FFE3)",
     "#4 - ROM ($FFE4)", "#5 - ROM ($FFE5)", "#6 - ROM ($FFE6)", "#7 - RAM ($FFE7)"
@@ -212,7 +219,9 @@ const char* CartridgeE7Widget::getSpotLower(int idx)
 
   return myCart.romBankCount() == 4
     ? spot_lower_8K[idx]
-    : spot_lower_16K[idx];
+    : myCart.romBankCount() == 6
+      ? spot_lower_12K[idx]
+      : spot_lower_16K[idx];
 }
 
 

src/emucore/CartDetector.cxx

@@ -98,7 +98,10 @@ Bankswitch::Type CartDetector::autodetectType(const ByteBuffer& image, size_t si
   }
   else if(size == 12_KB)
   {
-    type = Bankswitch::Type::_FA;
+    if(isProbablyE7(image, size))
+      type = Bankswitch::Type::_E7;
+    else
+      type = Bankswitch::Type::_FA;
   }
   else if(size == 16_KB)
   {

src/emucore/CartE7.cxx

@@ -115,6 +115,14 @@ void CartridgeE7::checkSwitchBank(uInt16 address)
   {
     bank(address & 0x0003);
   }
+  else if(romBankCount() == 6 && (address >= 0x0FE0) && (address <= 0x0FE7))
+  {
+    static constexpr std::array<int, 8> banks = {
+      0, 1, 0, 1, 2, 3, 4 ,5
+    };
+
+    bank(banks[address & 0x0007]);
+  }
   else if(romBankCount() == 8 && (address >= 0x0FE0) && (address <= 0x0FE7))
   {
     bank(address & 0x0007);