--- nono/vm/qemusysctlr.cpp	2026/04/29 17:05:24	1.1
+++ nono/vm/qemusysctlr.cpp	2026/04/29 17:06:00	1.1.1.3
@@ -11,7 +11,9 @@
 // https://www.qemu.org/docs/master/specs/virt-ctlr.html
 
 #include "qemusysctlr.h"
+#include "mainbus.h"
 #include "power.h"
+#include "syncer.h"
 
 // コンストラクタ
 QemuSysCtlrDevice::QemuSysCtlrDevice()
@@ -25,28 +27,30 @@ QemuSysCtlrDevice::~QemuSysCtlrDevice()
 }
 
 busdata
-QemuSysCtlrDevice::Read32(uint32 addr)
+QemuSysCtlrDevice::ReadPort(uint32 offset)
 {
-	uint32 offset = addr & 0xff;
+	busdata data;
 
 	if (offset == 0) {
 		// Features (Read Only)
-		uint32 data = FEATURES;
-		putlog(2, "FEATURES -> $%08x", data);
-		return data;
+		data = FEATURES;
+		putlog(2, "FEATURES -> $%08x", data.Data());
 	} else {
 		// 他のポートがどうなるのかは仕様に書いてない。
-		putlog(1, "Read32 $%08x (BusErr)", addr);
-		return busdata::BusErr;
+		data.SetBusErr();
+		putlog(1, "Read $%08x (BusErr)", GetMainbusDevice()->GetPaddr());
 	}
+
+	data |= BusData::Size4;
+	return data;
 }
 
 busdata
-QemuSysCtlrDevice::Write32(uint32 addr, uint32 data)
+QemuSysCtlrDevice::WritePort(uint32 offset, uint32 data)
 {
-	uint32 offset = addr & 0xff;
+	busdata r;
 
-	if (offset == 4) {
+	if (offset == 1) {
 		// Command (Write Only)
 		static const char *cmdname[] = {
 			"no-op",
@@ -66,30 +70,40 @@ QemuSysCtlrDevice::Write32(uint32 addr,
 			break;
 
 		 case 2:	// halt
-		 case 3:	// panic
 			GetPowerDevice()->PushPowerButton();
 			break;
+
+		 case 3:	// panic
+			DoPanic();
+			break;
 		}
-		return 0;
 	} else {
 		// 他のポートがどうなるのかは仕様に書いてない。
-		putlog(1, "Write32 $%08x <- $%08x (BusErr)", addr, data);
-		return busdata::BusErr;
+		putlog(1, "Write $%08x <- $%08x (BusErr)",
+			GetMainbusDevice()->GetPaddr(), data);
+		r.SetBusErr();
 	}
+
+	r |= BusData::Size4;
+	return r;
 }
 
 busdata
-QemuSysCtlrDevice::Peek8(uint32 addr)
+QemuSysCtlrDevice::PeekPort(uint32 offset)
 {
-	uint32 offset = addr & 0xff;
-
 	switch (offset) {
-	 case 0:	return (FEATURES >> 24);
-	 case 1:	return (FEATURES >> 16) & 0xff;
-	 case 2:	return (FEATURES >>  8) & 0xff;
-	 case 3:	return (FEATURES      ) & 0xff;
-
+	 case 0:	return FEATURES;
 	 default:
-		return busdata::BusErr;
+		return BusData::BusErr;
 	}
 }
+
+// ゲストがパニックしたので、状態を保全して停止。
+// 本当はデバッガで止まるとかすればいいんだろうけど。
+void
+QemuSysCtlrDevice::DoPanic()
+{
+	// 速度だけは落としておく。
+	auto syncer = GetSyncer();
+	syncer->NotifyFullSpeed(false);
+}