diff --git a/tsvm_core/src/net/torvald/tsvm/VMSetupBroker.kt b/tsvm_core/src/net/torvald/tsvm/VMSetupBroker.kt
index 2cb8873..7c53ffb 100644
--- a/tsvm_core/src/net/torvald/tsvm/VMSetupBroker.kt
+++ b/tsvm_core/src/net/torvald/tsvm/VMSetupBroker.kt
@@ -111,7 +111,7 @@ object VMSetupBroker {
                     try {
                         val argTypes = argTypess[k].parameterTypes
 
-                        println("loadedClass = $className")
+                        println("COM${index+1} loadedClass = $className")
                         println("trying constructor args[${k}/${argTypess.lastIndex}]: ${argTypes.joinToString { it.canonicalName }}")
 
                         val args = deviceInfo.get("args").allIntoJavaType(argTypes.tail())
@@ -140,6 +140,8 @@ object VMSetupBroker {
             jsonValue?.let { deviceInfo ->
                 val className = deviceInfo.getString("cls")
 
+                println("CARD${index} loadedClass = $className")
+
                 val loadedClass = Class.forName(className)
                 val argTypes = loadedClass.declaredConstructors[0].parameterTypes
                 val args = deviceInfo.get("args").allIntoJavaType(argTypes.tail())
diff --git a/tsvm_core/src/net/torvald/tsvm/peripheral/RamBank.kt b/tsvm_core/src/net/torvald/tsvm/peripheral/RamBank.kt
index b193d49..73df87f 100644
--- a/tsvm_core/src/net/torvald/tsvm/peripheral/RamBank.kt
+++ b/tsvm_core/src/net/torvald/tsvm/peripheral/RamBank.kt
@@ -8,7 +8,9 @@ import java.io.File
 /**
  * Created by minjaesong on 2022-07-20.
  */
-open class RamBank(val vm: VM, bankCount: Int, val writable: Boolean = true) : PeriBase("ramb") {
+open class RamBank(val vm: VM, bankCount: Int) : PeriBase("ramb") {
+
+    open val writable = true
 
     val bankSize = 524288L
 
@@ -283,12 +285,13 @@ open class RamBank(val vm: VM, bankCount: Int, val writable: Boolean = true) : P
     override fun getVM() = vm
 }
 
-open class RomBank(vm: VM, romfile: File, bankCount: Int) : RamBank(vm, bankCount, false) {
+open class RomBank(vm: VM, romfile: File, bankCount: Int) : RamBank(vm, bankCount) {
     init {
         val bytes = romfile.readBytes()
         UnsafeHelper.memcpyRaw(bytes, 0, null, mem.ptr, bytes.size.toLong())
     }
     override val typestring = "romb"
+    override val writable = false
     override fun poke(addr: Long, byte: Byte) {
 
     }
diff --git a/tsvm_executable/src/net/torvald/tsvm/VMEmuExecutable.kt b/tsvm_executable/src/net/torvald/tsvm/VMEmuExecutable.kt
index 683529e..911570c 100644
--- a/tsvm_executable/src/net/torvald/tsvm/VMEmuExecutable.kt
+++ b/tsvm_executable/src/net/torvald/tsvm/VMEmuExecutable.kt
@@ -421,13 +421,16 @@ class VMEmuExecutable(val windowWidth: Int, val windowHeight: Int, var panelsX:
         "DUMMY" to dummyMenu
     )
 
-    private val menuTabs = listOf("Profiles", "MMIO", "MMU", "COM", "Card1", "Card2", "Card3", "Card4", "Card5", "Card6", "Card7", "Setup")
+    private val menuTabs = listOf("Profiles", "MMIO", "MMU", "COM1", "COM2", "COM3", "COM4", "Crd1", "Crd2", "Crd3", "Crd4", "Crd5", "Crd6", "Crd7")
     private val tabPos = (menuTabs + "").mapIndexed { index, _ -> 1 + menuTabs.subList(0, index).sumBy { it.length } + 2 * index }
     private val tabs = arrayOf(
         ProfilesMenu(this, menuTabX, menuTabY, menuTabW, menuTabH), // Profiles
         DummyMenu(this, menuTabX, menuTabY, menuTabW, menuTabH), // MMIO
         MMUMenu(this, menuTabX, menuTabY, menuTabW, menuTabH), // MMU
-        DummyMenu(this, menuTabX, menuTabY, menuTabW, menuTabH), // COM
+        DummyMenu(this, menuTabX, menuTabY, menuTabW, menuTabH), // COM1
+        DummyMenu(this, menuTabX, menuTabY, menuTabW, menuTabH), // COM2
+        DummyMenu(this, menuTabX, menuTabY, menuTabW, menuTabH), // COM3
+        DummyMenu(this, menuTabX, menuTabY, menuTabW, menuTabH), // COM4
         DummyMenu(this, menuTabX, menuTabY, menuTabW, menuTabH), // Card1
         DummyMenu(this, menuTabX, menuTabY, menuTabW, menuTabH), // Card2
         DummyMenu(this, menuTabX, menuTabY, menuTabW, menuTabH), // Card3
@@ -435,10 +438,12 @@ class VMEmuExecutable(val windowWidth: Int, val windowHeight: Int, var panelsX:
         DummyMenu(this, menuTabX, menuTabY, menuTabW, menuTabH), // Card5
         DummyMenu(this, menuTabX, menuTabY, menuTabW, menuTabH), // Card6
         DummyMenu(this, menuTabX, menuTabY, menuTabW, menuTabH), // Card7
-        DummyMenu(this, menuTabX, menuTabY, menuTabW, menuTabH), // Setup
     )
     private var menuTabSel = 0
 
+    private val cardTabIndex = menuTabs.indexOf("Crd1")
+    private val comTabIndex = menuTabs.indexOf("COM1")
+
     private var tabChangeRequested: Int? = 0 // null: not requested
 
     // call this whenever the VM selection has changed
@@ -450,7 +455,20 @@ class VMEmuExecutable(val windowWidth: Int, val windowHeight: Int, var panelsX:
                 val periType = vm.peripheralTable[i].type ?: "DUMMY"
                 val menu = menuRepository[periType] ?: dummyMenu
                 menu.cardIndex = i
-                tabs[3 + i] = menu
+                tabs[cardTabIndex + i - 1] = menu
+            }
+        }
+    }
+    // call this whenever the VM selection has changed
+    private fun refreshComTabs() {
+        val vm = getCurrentlySelectedVM()?.vm
+
+        if (vm != null) {
+            for (i in 1..7) {
+                val periType = TODO() ?: "DUMMY"
+                val menu = menuRepository[periType] ?: dummyMenu
+                menu.cardIndex = i // COM will recycle cardIndex
+                tabs[comTabIndex + i - 1] = menu
             }
         }
     }