From e1f3abda4f2dcb54407f947f5319fe740ee13ebc Mon Sep 17 00:00:00 2001
From: thrust26 <tjentzsch@yahoo.de>
Date: Wed, 9 Dec 2020 20:55:08 +0100
Subject: [PATCH] fixed MDM single bank ROM crash (fixes #743)

---
 src/debugger/gui/CartMDMWidget.cxx   | 25 +++++++++++++++----------
 src/debugger/gui/CartTVBoyWidget.cxx | 21 +++++++++++++--------
 2 files changed, 28 insertions(+), 18 deletions(-)

diff --git a/src/debugger/gui/CartMDMWidget.cxx b/src/debugger/gui/CartMDMWidget.cxx
index a3509cb34..3b1084aee 100644
--- a/src/debugger/gui/CartMDMWidget.cxx
+++ b/src/debugger/gui/CartMDMWidget.cxx
@@ -46,22 +46,27 @@ string CartridgeMDMWidget::description()
 void CartridgeMDMWidget::bankSelect(int& ypos)
 {
   CartridgeEnhancedWidget::bankSelect(ypos);
-  int xpos = myBankWidgets[0]->getRight() + 20;
-  ypos = myBankWidgets[0]->getTop();
+  if(myCart.romBankCount() > 1)
+  {
+    int xpos = myBankWidgets[0]->getRight() + 20;
+    ypos = myBankWidgets[0]->getTop();
 
-  myBankDisabled = new CheckboxWidget(_boss, _font, xpos, ypos + 1,
-                                      "Bankswitching is locked/disabled",
-                                      kBankDisabled);
-  myBankDisabled->setTarget(this);
-  addFocusWidget(myBankDisabled);
+    myBankDisabled = new CheckboxWidget(_boss, _font, xpos, ypos + 1,
+                                        "Bankswitching is locked/disabled",
+                                        kBankDisabled);
+    myBankDisabled->setTarget(this);
+    addFocusWidget(myBankDisabled);
+  }
 }
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 void CartridgeMDMWidget::loadConfig()
 {
-  myBankWidgets[0]->setEnabled(!myCartMDM.myBankingDisabled);
-  myBankDisabled->setState(myCartMDM.myBankingDisabled);
-
+  if(myBankWidgets != nullptr)
+  {
+    myBankWidgets[0]->setEnabled(!myCartMDM.myBankingDisabled);
+    myBankDisabled->setState(myCartMDM.myBankingDisabled);
+  }
   CartridgeEnhancedWidget::loadConfig();
 }
 
diff --git a/src/debugger/gui/CartTVBoyWidget.cxx b/src/debugger/gui/CartTVBoyWidget.cxx
index 5012642ba..891a39b38 100644
--- a/src/debugger/gui/CartTVBoyWidget.cxx
+++ b/src/debugger/gui/CartTVBoyWidget.cxx
@@ -46,22 +46,27 @@ string CartridgeTVBoyWidget::description()
 void CartridgeTVBoyWidget::bankSelect(int& ypos)
 {
   CartridgeEnhancedWidget::bankSelect(ypos);
-  int xpos = myBankWidgets[0]->getRight() + _font.getMaxCharWidth() * 4;
-  ypos = myBankWidgets[0]->getTop();
+  if(myCart.romBankCount() > 1)
+  {
+    int xpos = myBankWidgets[0]->getRight() + _font.getMaxCharWidth() * 4;
+    ypos = myBankWidgets[0]->getTop();
 
-  myBankLocked = new CheckboxWidget(_boss, _font, xpos, ypos + 1,
+    myBankLocked = new CheckboxWidget(_boss, _font, xpos, ypos + 1,
                                       "Bankswitching is locked",
                                       kBankLocked);
-  myBankLocked->setTarget(this);
-  addFocusWidget(myBankLocked);
+    myBankLocked->setTarget(this);
+    addFocusWidget(myBankLocked);
+  }
 }
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 void CartridgeTVBoyWidget::loadConfig()
 {
-  myBankWidgets[0]->setEnabled(!myCartTVBoy.myBankingDisabled);
-  myBankLocked->setState(myCartTVBoy.myBankingDisabled);
-
+  if(myBankWidgets != nullptr)
+  {
+    myBankWidgets[0]->setEnabled(!myCartTVBoy.myBankingDisabled);
+    myBankLocked->setState(myCartTVBoy.myBankingDisabled);
+  }
   CartridgeEnhancedWidget::loadConfig();
 }