diff --git a/Changes.txt b/Changes.txt
index 61989ecd9..20ed3e411 100644
--- a/Changes.txt
+++ b/Changes.txt
@@ -32,6 +32,8 @@
 
   * Restored 'cfg' directory for Distella config files.
 
+  * Added 3EX bank switching type.
+
   * Removed unused CV+ and DASH bank switching types.
 
 -Have fun!
diff --git a/docs/index.html b/docs/index.html
index c7185ebe1..6f9fb85a9 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -3790,8 +3790,9 @@ Ms Pac-Man (Stella extended codes):
         <tr><td>32IN1 &#185;</td><td>64-128K Multicart (32 games) </td><td>.32N, .32N1 </td></tr>
         <tr><td>64IN1 &#185;</td><td>64/128K Multicart </td><td>.64N, .64N1 </td></tr>
         <tr><td>128IN1 &#185;</td><td>256/512K Multicart </td><td>.128, .128N1 </td></tr>
-        <tr><td>2K </td><td>32-2048 byte Atari </td><td>.2K </td></tr>
-        <tr><td>3E </td><td>32K Tigervision </td><td>.3E </td></tr>
+        <tr><td>2K </td><td>32-2048 bytes Atari </td><td>.2K </td></tr>
+        <tr><td>3E </td><td>512K Tigervision + 32K RAM</td><td>.3E </td></tr>
+        <tr><td>3EX </td><td>512K Tigervision + 256K RAM</td><td>.3EX </td></tr>
         <tr><td>3E+ </td><td>3E+ (TJ modified 3E) </td><td>.3EP, .3E+ </td></tr>
         <tr><td>3F </td><td>512K Tigervision </td><td>.3F </td></tr>
         <tr><td>4A50 &#178;</td><td>64K 4A50 + RAM </td><td>.4A5, .4A50 </td></tr>
@@ -3826,7 +3827,7 @@ Ms Pac-Man (Stella extended codes):
         <tr><td>FC </td><td>Amiga Power Play Aracde 16/32K </td><td>.FC </td></tr>
         <tr><td>FE </td><td>8K Decathlon </td><td>.FE </td></tr>
         <tr><td>MDM </td><td>Menu Driven Megacart </td><td>.MDM </td></tr>
-        <tr><td>SB </td><td>128-256k SUPERbanking </td><td>.SB </td></tr>
+        <tr><td>SB </td><td>128-256K SUPERbanking </td><td>.SB </td></tr>
         <tr><td>UA </td><td>8K UA Ltd. </td><td>.UA </td></tr>
         <tr><td>UASW </td><td>8K UA Ltd. (swapped banks)</td><td>.UASW </td></tr>
         <tr><td>WD </td><td>Wickstead Design (Pink Panther) </td><td>.WD </td></tr>
diff --git a/src/emucore/Cart3EX.cxx b/src/emucore/Cart3EX.cxx
index 4f9c7ac45..889935a07 100644
--- a/src/emucore/Cart3EX.cxx
+++ b/src/emucore/Cart3EX.cxx
@@ -23,5 +23,6 @@ Cartridge3EX::Cartridge3EX(const ByteBuffer& image, size_t size,
   : Cartridge3E(image, size, md5, settings)
 {
   myRamSize = RAM_SIZE;
-  myRamBankCount = RAM_BANKS;
+  // 0xFFFA contains RAM bank count - 1;
+  myRamBankCount = image[size - 6] + 1;
 }
diff --git a/src/emucore/Cart3EX.hxx b/src/emucore/Cart3EX.hxx
index 99181cffd..e7ba2ecfd 100644
--- a/src/emucore/Cart3EX.hxx
+++ b/src/emucore/Cart3EX.hxx
@@ -69,9 +69,6 @@ public:
 #endif
 
 private:
-  // The number of RAM banks
-  static constexpr uInt16 RAM_BANKS = 256;
-
   // RAM size
   static constexpr size_t RAM_SIZE = RAM_BANKS << (BANK_SHIFT - 1); // = 256K = 0x40000;