--- nono/vm/printer.cpp	2026/04/29 17:05:18	1.1.1.8
+++ nono/vm/printer.cpp	2026/04/29 17:05:25	1.1.1.9
@@ -11,6 +11,9 @@
 #include "printer.h"
 #include "mpu.h"
 
+// InsideOut p.135
+static const busdata wait = busdata::Wait(7 * 40_nsec);
+
 // コンストラクタ
 PrinterDevice::PrinterDevice()
 	: inherited(OBJ_PRINTER)
@@ -22,50 +25,56 @@ PrinterDevice::~PrinterDevice()
 {
 }
 
-uint64
+busdata
 PrinterDevice::Read8(uint32 addr)
 {
 	// 書き込み専用
-	mpu->AddCycle(7);	// InsideOut p.135
-	return (uint64)-1;
+	busdata data = busdata::BusErr;
+	data |= wait;
+	return data;
 }
 
-uint64
+busdata
 PrinterDevice::Read16(uint32 addr)
 {
 	// 書き込み専用
-	mpu->AddCycle(7);	// InsideOut p.135
-	return (uint64)-1;
+	busdata data = busdata::BusErr;
+	data |= wait;
+	return data;
 }
 
-uint64
+busdata
 PrinterDevice::Write8(uint32 addr, uint32 data)
 {
-	mpu->AddCycle(7);	// InsideOut p.135
-
 	uint32 offset = addr - baseaddr;
+	busdata r;
+
 	switch (offset) {
 	 case 0:
 		// データ書き込み
 		putlog(0, "Write Data (NOT IMPLEMENTED)");
+		r.SetBusErr();
 		break;
 	 case 3:
 		// ストローブ書き込み
 		putlog(0, "Write Strobe (NOT IMPLEMENTED)");
-		return 0;
+		r = 0;
+		break;
 	 default:
 		break;
 	}
-	return (uint64)-1;
+
+	r |= wait;
+	return r;
 }
 
-uint64
+busdata
 PrinterDevice::Write16(uint32 addr, uint32 data)
 {
 	return Write8(addr + 1, data);
 }
 
-uint64
+busdata
 PrinterDevice::Peek8(uint32 addr)
 {
 	// XXX