From 9c7632fb1cbc47abdf954980e8b88c7b0c314c58 Mon Sep 17 00:00:00 2001
From: folkert van heusden <mail@vanheusden.com>
Date: Mon, 11 Apr 2022 21:00:42 +0200
Subject: [PATCH] breakpoints

---
 cpu.cpp  | 15 +++++++++++++++
 cpu.h    |  6 ++++++
 main.cpp |  5 +++++
 3 files changed, 26 insertions(+)

diff --git a/cpu.cpp b/cpu.cpp
index 3dfd105..57555c2 100644
--- a/cpu.cpp
+++ b/cpu.cpp
@@ -30,6 +30,21 @@ void cpu::emulation_start()
 	running_since = get_ms();
 }
 
+bool cpu::check_breakpoint()
+{
+	return breakpoints.find(getPC()) != breakpoints.end();
+}
+
+void cpu::set_breakpoint(const uint16_t addr)
+{
+	breakpoints.insert(addr);
+}
+
+void cpu::remove_breakpoint(const uint16_t addr)
+{
+	breakpoints.erase(addr);
+}
+
 uint64_t cpu::get_instructions_executed_count()
 {
 	// this may wreck havoc as it is not protected by a mutex
diff --git a/cpu.h b/cpu.h
index d98cfe0..31cefcb 100644
--- a/cpu.h
+++ b/cpu.h
@@ -28,6 +28,8 @@ private:
 	// level, vector
 	std::map<uint8_t, std::set<uint8_t> > queued_interrupts;
 
+	std::set<uint16_t> breakpoints;
+
 	bus *const b { nullptr };
 
 	uint32_t *const event { nullptr };
@@ -62,6 +64,10 @@ public:
 	explicit cpu(bus *const b, uint32_t *const event);
 	~cpu();
 
+	bool check_breakpoint();
+	void set_breakpoint(const uint16_t addr);
+	void remove_breakpoint(const uint16_t addr);
+
 	void disassemble(void) const;
 	std::map<std::string, std::vector<std::string> > disassemble(const uint16_t addr) const;
 
diff --git a/main.cpp b/main.cpp
index cf5944d..3781031 100644
--- a/main.cpp
+++ b/main.cpp
@@ -273,8 +273,13 @@ int main(int argc, char *argv[])
 			if (tracing)
 				c->disassemble();
 
+			if (c->check_breakpoint())
+				break;
+
 			c->step();
 		}
+
+		// TODO: some menu
 	}
 	else {
 		while(!event && !terminate)