--- nono/vm/kbc.cpp	2026/04/29 17:05:18	1.1
+++ nono/vm/kbc.cpp	2026/04/29 17:05:25	1.1.1.2
@@ -24,48 +24,61 @@ KBCDevice::~KBCDevice()
 {
 }
 
-uint64
+busdata
 KBCDevice::Read8(uint32 addr)
 {
+	busdata data;
+
 	// XXX 折り返しは不明
 	switch (addr & 7) {
 	 case KEYDATA:
-		return 0;
+		data = 0;
+		break;
 
 	 case KEYSTAT:
-		return 0xc0;	// KBRDY, MSRDY
+		data = 0xc0;	// KBRDY, MSRDY
+		break;
 
 	 case KEYINTE:
-		return 0;		// ?
+		data = 0;		// ?
+		break;
 
 	 case KEYRESET:
-		return 0xff;	// ?
+		data = 0xff;	// ?
+		break;
 
 	 case KEYBUZZ:
-		return 0xff;	// ?
+		data = 0xff;	// ?
+		break;
 
 	 case MSDATA:
-		return 0;
+		data = 0;
+		break;
 
 	 case MSINTE:		// ?
-		return 0;
+		data = 0;
+		break;
 
 	 case MSRESET:		// ?
-		return 0xff;
+		data = 0xff;
+		break;
 
 	 default:
-		return 0xff;
+		data = 0xff;
+		break;
 	}
+
+	return data;
 }
 
-uint64
+busdata
 KBCDevice::Write8(uint32 addr, uint32 data)
 {
 	// とりあえず全無視
 	return 0;
 }
 
-uint64
+busdata
 KBCDevice::Peek8(uint32 addr)
 {
 	// XXX 未実装