--- nono/debugger/branchhistory.h	2026/04/29 17:05:41	1.1.1.9
+++ nono/debugger/branchhistory.h	2026/04/29 17:05:59	1.1.1.10
@@ -53,7 +53,7 @@ class BranchHistory : public Object
 	const BranchEntry& AddEntry(uint32 from, uint32 to, uint32 info) {
 		BranchEntry *e = &entry[top];
 
-		if (e->from == from && e->to == to) {
+		if (e->from == from && e->to == to && e->info == info) {
 			// 前回と同じなら通過回数++
 			e->count++;
 		} else {
@@ -83,7 +83,7 @@ class BranchHistory : public Object
 	virtual std::string FormatHeader() const;
 	virtual std::string FormatEntry(const BranchEntry& e) = 0;
 
-	DECLARE_MONITOR_CALLBACK(MonitorUpdate);
+	DECLARE_MONITOR_SCREEN(MonitorScreen);
 
 	// 例外履歴かどうか。ヘッダ行が違う。
 	bool is_exhist {};
@@ -105,7 +105,8 @@ class BranchHistory_m680x0 : public Bran
 	// info の分岐種別
 	static constexpr uint32 NORMAL		= 0x00000000;	// 通常分岐
 	static constexpr uint32 VECTORJUMP	= 0x40000000;	// ベクタによる分岐
-	static constexpr uint32 SERVICECALL	= 0x80000000;	// IOCS/DOS コール
+	static constexpr uint32 SERVICECALL_HUMAN	= 0x80000000; // IOCS/DOS call
+	static constexpr uint32 SERVICECALL_NETBSD	= 0x80010000; // NetBSD syscall
 	static constexpr uint32 EXCEPTION	= 0xc0000000;	// 例外発生
 
  public:
@@ -122,10 +123,13 @@ class BranchHistory_m680x0 : public Bran
 		return EXCEPTION | vector;
 	}
 	static constexpr uint32 InfoIOCSCall(uint8 num) {
-		return SERVICECALL | num;
+		return SERVICECALL_HUMAN | num;
 	}
 	static constexpr uint32 InfoDOSCall(uint16 ir) {
-		return SERVICECALL | ir;
+		return SERVICECALL_HUMAN | ir;
+	}
+	static constexpr uint32 InfoNetBSDSyscall(uint16 syscall) {
+		return SERVICECALL_NETBSD | syscall;
 	}
 
 	std::string FormatEntry(const BranchEntry& e) override;