From 16b4658a713db57435f29a49e1f973137dc80d99 Mon Sep 17 00:00:00 2001
From: diyelectromusic <68612569+diyelectromusic@users.noreply.github.com>
Date: Mon, 17 Apr 2023 20:50:49 +0100
Subject: [PATCH] If running on a RPI 1 or single core Pi then default to the
 TG1 menu as the home menu.

---
 src/uimenu.cpp | 34 +++++++++++++++++++++++++++++++++-
 1 file changed, 33 insertions(+), 1 deletion(-)

diff --git a/src/uimenu.cpp b/src/uimenu.cpp
index ee830166..035822f7 100644
--- a/src/uimenu.cpp
+++ b/src/uimenu.cpp
@@ -338,6 +338,23 @@ CUIMenu::CUIMenu (CUserInterface *pUI, CMiniDexed *pMiniDexed)
 	m_nCurrentParameter (0),
 	m_nCurrentMenuDepth (0)
 {
+#ifndef ARM_ALLOW_MULTI_CORE
+	// If there is just one core, then there is only a single
+	// tone generator so start on the TG1 menu...
+	m_pParentMenu = s_MainMenu;
+	m_pCurrentMenu = s_TGMenu;
+	m_nCurrentMenuItem = 0;
+	m_nCurrentSelection = 0;
+	m_nCurrentParameter = 0;
+	m_nCurrentMenuDepth = 1;
+
+	// Place the "root" menu at the top of the stack
+	m_MenuStackParent[0] = s_MenuRoot;
+	m_MenuStackMenu[0] = s_MainMenu;
+	m_nMenuStackItem[0]	= 0;
+	m_nMenuStackSelection[0] = 0;
+	m_nMenuStackParameter[0] = 0;
+#endif
 }
 
 void CUIMenu::EventHandler (TMenuEvent Event)
@@ -360,13 +377,28 @@ void CUIMenu::EventHandler (TMenuEvent Event)
 		break;
 
 	case MenuEventHome:
+#ifdef ARM_ALLOW_MULTI_CORE
 		m_pParentMenu = s_MenuRoot;
 		m_pCurrentMenu = s_MainMenu;
 		m_nCurrentMenuItem = 0;
 		m_nCurrentSelection = 0;
 		m_nCurrentParameter = 0;
 		m_nCurrentMenuDepth = 0;
-
+#else
+		// "Home" is the TG0 menu if only one TG active
+		m_pParentMenu = s_MainMenu;
+		m_pCurrentMenu = s_TGMenu;
+		m_nCurrentMenuItem = 0;
+		m_nCurrentSelection = 0;
+		m_nCurrentParameter = 0;
+		m_nCurrentMenuDepth = 1;
+		// Place the "root" menu at the top of the stack
+		m_MenuStackParent[0] = s_MenuRoot;
+		m_MenuStackMenu[0] = s_MainMenu;
+		m_nMenuStackItem[0] = 0;
+		m_nMenuStackSelection[0] = 0;
+		m_nMenuStackParameter[0] = 0;
+#endif
 		EventHandler (MenuEventUpdate);
 		break;