Merge 95e0b2e525 into 7c1d2a64f4

src/ARMInterpreter.cpp

@@ -266,6 +266,22 @@ void A_MRC(ARM* cpu)
 
 void A_SVC(ARM* cpu)
 {
+    // Print from game. Execute `svc 0xFC` with the null-terminated string address in `r0`.
+    if ((cpu->CurInstr & 0xFF) == 0xFC && cpu->NDS.GetDebugPrint())
+    {
+        u32 addr = cpu->R[0];
+        std::string output;
+        for (;;)
+        {
+            u32 c;
+            cpu->DataRead8(addr++, &c);
+            if (!c) break;
+            output += c;
+        }
+        Platform::Log(LogLevel::Info, "%s", output.c_str());
+        return;
+    }
+
     u32 oldcpsr = cpu->CPSR;
     cpu->CPSR &= ~0xBF;
     cpu->CPSR |= 0x93;
@@ -278,6 +294,22 @@ void A_SVC(ARM* cpu)
 
 void T_SVC(ARM* cpu)
 {
+    // Print from game. Execute `svc 0xFC` with the null-terminated string address in `r0`.
+    if ((cpu->CurInstr & 0xFF) == 0xFC && cpu->NDS.GetDebugPrint())
+    {
+        u32 addr = cpu->R[0];
+        std::string output;
+        for (;;)
+        {
+            u32 c;
+            cpu->DataRead8(addr++, &c);
+            if (!c) break;
+            output += c;
+        }
+        Platform::Log(LogLevel::Info, "%s", output.c_str());
+        return;
+    }
+
     u32 oldcpsr = cpu->CPSR;
     cpu->CPSR &= ~0xBF;
     cpu->CPSR |= 0x93;

src/NDS.cpp

@@ -752,6 +752,11 @@ void NDS::SetGBASave(const u8* savedata, u32 savelen)
 
 }
 
+void NDS::SetDebugPrint(bool enabled) noexcept
+{
+    DebugPrint = enabled;
+}
+
 void NDS::LoadGBAAddon(int type)
 {
     GBACartSlot.LoadAddon(UserData, type);

src/NDS.h

@@ -275,6 +275,7 @@ protected:
     std::array<u8, ARM7BIOSSize> ARM7BIOS;
     bool ARM9BIOSNative;
     bool ARM7BIOSNative;
+    bool DebugPrint;
 public: // TODO: Encapsulate the rest of these members
     u16 ARM7BIOSProt;
 
@@ -384,6 +385,9 @@ public: // TODO: Encapsulate the rest of these members
     u32 GetGBASaveLength() const { return GBACartSlot.GetSaveMemoryLength(); }
     void SetGBASave(const u8* savedata, u32 savelen);
 
+    bool GetDebugPrint() const { return DebugPrint; }
+    void SetDebugPrint(bool enabled) noexcept;
+
     void LoadGBAAddon(int type);
     std::unique_ptr<GBACart::CartCommon> EjectGBACart() { return GBACartSlot.EjectCart(); }
 

src/frontend/qt_sdl/Config.cpp

@@ -308,6 +308,8 @@ LegacyEntry LegacyFile[] =
 
     {"DSiFullBIOSBoot", 1, "DSi.FullBIOSBoot", true},
 
+    {"DebugPrintEnabled", 1, "DS.DebugPrintEnabled", true},
+
 #ifdef GDBSTUB_ENABLED
     {"GdbEnabled", 1, "Gdb.Enabled", false},
     {"GdbPortARM7", 0, "Gdb.ARM7.Port", true},

src/frontend/qt_sdl/EmuInstance.cpp

@@ -1384,6 +1384,7 @@ bool EmuInstance::updateConsole(UpdateConsoleNDSArgs&& _ndsargs, UpdateConsoleGB
             dsi->EjectGBACart();
         }
     }
+    nds->SetDebugPrint(globalCfg.GetBool("DS.DebugPrintEnabled"));
     renderLock.unlock();
 
     return true;

src/frontend/qt_sdl/EmuSettingsDialog.cpp

@@ -61,6 +61,8 @@ EmuSettingsDialog::EmuSettingsDialog(QWidget* parent) : QDialog(parent), ui(new
 
     lastBIOSFolder = cfg.GetQString("LastBIOSFolder");
 
+    ui->cbDebugPrintEnabled->setChecked(cfg.GetBool("DS.DebugPrintEnabled"));
+
     ui->chkExternalBIOS->setChecked(cfg.GetBool("Emu.ExternalBIOSEnable"));
     ui->txtBIOS9Path->setText(cfg.GetQString("DS.BIOS9Path"));
     ui->txtBIOS7Path->setText(cfg.GetQString("DS.BIOS7Path"));
@@ -108,6 +110,8 @@ EmuSettingsDialog::EmuSettingsDialog(QWidget* parent) : QDialog(parent), ui(new
     ui->cbGdbBOSA9->setDisabled(true);
 #endif
 
+    ui->cbDebugPrintEnabled->setChecked(cfg.GetBool("DS.DebugPrintEnabled"));
+
     on_chkEnableJIT_toggled();
     on_cbGdbEnabled_toggled();
     on_chkExternalBIOS_toggled();
@@ -272,6 +276,8 @@ void EmuSettingsDialog::done(int r)
             cfg.SetBool("DLDI.FolderSync", ui->cbDLDIFolder->isChecked());
             cfg.SetQString("DLDI.FolderPath", ui->txtDLDIFolder->text());
 
+            cfg.SetBool("DS.DebugPrintEnabled", ui->cbDebugPrintEnabled->isChecked());
+
             cfg.SetQString("DSi.BIOS9Path", ui->txtDSiBIOS9Path->text());
             cfg.SetQString("DSi.BIOS7Path", ui->txtDSiBIOS7Path->text());
             cfg.SetQString("DSi.FirmwarePath", ui->txtDSiFirmwarePath->text());

src/frontend/qt_sdl/EmuSettingsDialog.ui

@@ -573,14 +573,14 @@
        <string>Devtools</string>
       </attribute>
       <layout class="QGridLayout" name="gridLayout_3">
-       <item row="1" column="0">
+       <item row="3" column="0">
         <widget class="QLabel" name="label_16">
          <property name="text">
           <string>ARM9 port</string>
          </property>
         </widget>
        </item>
-       <item row="5" column="0">
+       <item row="6" column="0">
         <spacer name="verticalSpacer_4">
          <property name="orientation">
           <enum>Qt::Vertical</enum>
@@ -593,7 +593,7 @@
          </property>
         </spacer>
        </item>
-       <item row="2" column="0">
+       <item row="4" column="0">
         <widget class="QLabel" name="label_17">
          <property name="text">
           <string>ARM7 port</string>
@@ -607,28 +607,42 @@
          </property>
         </widget>
        </item>
-       <item row="4" column="0" colspan="7">
+       <item row="0" column="2" colspan="3">
-        <widget class="QLabel" name="label_18">
+        <widget class="QCheckBox" name="cbDebugPrintEnabled">
          <property name="text">
-          <string>Note: melonDS must be restarted in order for these changes to have effect</string>
+          <string>Enable debug print</string>
          </property>
         </widget>
        </item>
-       <item row="3" column="0" colspan="7">
+       <item row="1" column="0" colspan="7">
-        <widget class="QLabel" name="label_19">
+        <widget class="QLabel" name="label_18">
          <property name="text">
           <string>Note: GDB stub cannot be used together with the JIT recompiler</string>
          </property>
         </widget>
        </item>
-       <item row="1" column="6">
+       <item row="2" column="0" colspan="7">
+        <widget class="QLabel" name="label_19">
+         <property name="text">
+          <string>Note: Debug print outputs to terminal on SVC 0xFC</string>
+         </property>
+        </widget>
+       </item>
+       <item row="5" column="0" colspan="7">
+        <widget class="QLabel" name="label_20">
+         <property name="text">
+          <string>Note: melonDS must be restarted in order for these changes to have effect</string>
+         </property>
+        </widget>
+       </item>
+       <item row="3" column="6">
         <widget class="QCheckBox" name="cbGdbBOSA9">
          <property name="text">
           <string>Break on startup</string>
          </property>
         </widget>
        </item>
-       <item row="1" column="1" colspan="5">
+       <item row="3" column="1" colspan="5">
         <widget class="QSpinBox" name="intGdbPortA9">
          <property name="minimum">
           <number>1000</number>
@@ -641,7 +655,7 @@
          </property>
         </widget>
        </item>
-       <item row="2" column="1" colspan="5">
+       <item row="4" column="1" colspan="5">
         <widget class="QSpinBox" name="intGdbPortA7">
          <property name="minimum">
           <number>1000</number>
@@ -654,7 +668,7 @@
          </property>
         </widget>
        </item>
-       <item row="2" column="6">
+       <item row="4" column="6">
         <widget class="QCheckBox" name="cbGdbBOSA7">
          <property name="text">
           <string>Break on startup</string>