--- nono/vm/mainbus_virt68k.cpp	2026/04/29 17:05:51	1.1.1.4
+++ nono/vm/mainbus_virt68k.cpp	2026/04/29 17:06:01	1.1.1.5
@@ -87,6 +87,7 @@ busdata
 Virt68kMainbus::Read(busaddr addr)
 {
 	uint32 pa = addr.Addr();
+	lastaddr = pa;
 	accstat_read[pa >> AccStat::SHIFT] = AccStat::READ;
 	IODevice *dev = Decoder(pa);
 	return dev->Read(addr);
@@ -96,6 +97,7 @@ busdata
 Virt68kMainbus::Write(busaddr addr, uint32 data)
 {
 	uint32 pa = addr.Addr();
+	lastaddr = pa;
 	accstat_read[pa >> AccStat::SHIFT] = AccStat::WRITE;
 	IODevice *dev = Decoder(pa);
 	return dev->Write(addr, data);
@@ -105,6 +107,7 @@ busdata
 Virt68kMainbus::ReadBurst16(busaddr addr, uint32 *dst)
 {
 	uint32 pa = addr.Addr();
+	lastaddr = pa;	// 開始アドレスしか残らない…
 	IODevice *dev = Decoder(pa);
 	busdata r = dev->ReadBurst16(addr, dst);
 	if (__predict_true(r.IsBusErr() == false)) {
@@ -117,6 +120,7 @@ busdata
 Virt68kMainbus::WriteBurst16(busaddr addr, const uint32 *src)
 {
 	uint32 pa = addr.Addr();
+	lastaddr = pa;	// 開始アドレスしか残らない…
 	IODevice *dev = Decoder(pa);
 	busdata r = dev->WriteBurst16(addr, src);
 	if (__predict_true(r.IsBusErr() == false)) {