From 971793a53ca0c5cb397477bebacfd4dfd0df7f01 Mon Sep 17 00:00:00 2001
From: tomcw <tomcw@users.noreply.github.com>
Date: Sat, 18 Oct 2025 15:39:11 +0100
Subject: [PATCH] Breakpoint card: add save/load state support

---
 source/Card.cpp                    |  8 +++++++-
 source/Debugger/BreakpointCard.cpp | 27 +++++++++++++++++++++++++++
 source/Debugger/BreakpointCard.h   |  5 +++--
 3 files changed, 37 insertions(+), 3 deletions(-)

diff --git a/source/Card.cpp b/source/Card.cpp
index 67d2e832..e409e63e 100644
--- a/source/Card.cpp
+++ b/source/Card.cpp
@@ -23,9 +23,9 @@ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 
 #include "Uthernet1.h"
 #include "Uthernet2.h"
+#include "BreakpointCard.h"
 #include "Mockingboard.h"
 #include "ParallelPrinter.h"
-#include "z80emu.h"
 #include "FourPlay.h"
 #include "LanguageCard.h"
 #include "MouseInterface.h"
@@ -163,6 +163,8 @@ std::string Card::GetCardName(const SS_CARDTYPE cardType)
 		return MockingboardCard::GetSnapshotCardNameMegaAudio();
 	case CT_SDMusic:
 		return MockingboardCard::GetSnapshotCardNameSDMusic();
+	case CT_BreakpointCard:
+		return BreakpointCard::GetSnapshotCardName();
 	default:
 		return "Unknown";
 	}
@@ -242,6 +244,10 @@ SS_CARDTYPE Card::GetCardType(const std::string & card)
 	{
 		return CT_SDMusic;
 	}
+	else if (card == BreakpointCard::GetSnapshotCardName())
+	{
+		return CT_BreakpointCard;
+	}
 	else
 	{
 		throw std::runtime_error("Slots: Unknown card: " + card);	// todo: don't throw - just ignore & continue
diff --git a/source/Debugger/BreakpointCard.cpp b/source/Debugger/BreakpointCard.cpp
index 748cb59a..dfc76e48 100644
--- a/source/Debugger/BreakpointCard.cpp
+++ b/source/Debugger/BreakpointCard.cpp
@@ -70,6 +70,7 @@
 #include "Debug.h"
 #include "BreakpointCard.h"
 #include "Memory.h"
+#include "YamlHelper.h"
 
 BreakpointCard::BreakpointCard(UINT slot) :
 	Card(CT_BreakpointCard, slot),
@@ -235,3 +236,29 @@ void BreakpointCard::Deferred(uint8_t type, uint16_t addrStart, uint16_t addrEnd
 	}
 
 }
+
+//===========================================================================
+
+static const UINT kUNIT_VERSION = 1;
+
+const std::string& BreakpointCard::GetSnapshotCardName(void)
+{
+	static const std::string name("Breakpoint");
+	return name;
+}
+
+void BreakpointCard::SaveSnapshot(YamlSaveHelper& yamlSaveHelper)
+{
+	YamlSaveHelper::Slot slot(yamlSaveHelper, GetSnapshotCardName(), m_slot, kUNIT_VERSION);
+
+	YamlSaveHelper::Label unit(yamlSaveHelper, "%s: null\n", SS_YAML_KEY_STATE);
+	// NB. No state for this card
+}
+
+bool BreakpointCard::LoadSnapshot(YamlLoadHelper& yamlLoadHelper, UINT version)
+{
+	if (version < 1 || version > kUNIT_VERSION)
+		ThrowErrorInvalidVersion(version);
+
+	return true;
+}
diff --git a/source/Debugger/BreakpointCard.h b/source/Debugger/BreakpointCard.h
index 7317bb11..eee38652 100644
--- a/source/Debugger/BreakpointCard.h
+++ b/source/Debugger/BreakpointCard.h
@@ -63,8 +63,9 @@ public:
 
 	static void CbFunction(uint8_t slot, INTERCEPTBREAKPOINT interceptBreakpoint);
 
-	virtual void SaveSnapshot(YamlSaveHelper& yamlSaveHelper) {}
-	virtual bool LoadSnapshot(YamlLoadHelper& yamlLoadHelper, UINT version) { return false; }
+	static const std::string& GetSnapshotCardName(void);
+	virtual void SaveSnapshot(YamlSaveHelper& yamlSaveHelper);
+	virtual bool LoadSnapshot(YamlLoadHelper& yamlLoadHelper, UINT version);
 
 private:
 	static int SyncEventCallback(int id, int cycles, ULONG uExecutedCycles);