--- nono/vm/sio.cpp	2026/04/29 17:05:24	1.1.1.12
+++ nono/vm/sio.cpp	2026/04/29 17:05:28	1.1.1.13
@@ -136,7 +136,7 @@ SIODevice::ResetChannel(MPSCCChan& chan)
 }
 
 busdata
-SIODevice::Read(uint32 offset)
+SIODevice::ReadPort(uint32 offset)
 {
 	busdata data;
 
@@ -154,14 +154,15 @@ SIODevice::Read(uint32 offset)
 		data = ReadCtrl(mpscc.chan[1]);
 		break;
 	 default:
-		VMPANIC("corrupted offset=%d", offset);
+		VMPANIC("corrupted offset=%u", offset);
 	}
 	// XXX wait?
+	data |= BusData::Size1;
 	return data;
 }
 
 busdata
-SIODevice::Write(uint32 offset, uint32 data)
+SIODevice::WritePort(uint32 offset, uint32 data)
 {
 	switch (offset) {
 	 case 0:
@@ -177,14 +178,15 @@ SIODevice::Write(uint32 offset, uint32 d
 		WriteCtrl(mpscc.chan[1], data);
 		break;
 	 default:
-		VMPANIC("corrupted offset=%d", offset);
+		VMPANIC("corrupted offset=%u", offset);
 	}
 	// XXX wait?
-	return 0;
+	busdata r = BusData::Size1;
+	return r;
 }
 
 busdata
-SIODevice::Peek(uint32 offset)
+SIODevice::PeekPort(uint32 offset)
 {
 	uint64 data;
 
@@ -210,20 +212,20 @@ SIODevice::Peek(uint32 offset)
 
 // 書き込みレジスタ名を返す
 const char *
-SIODevice::CRName(const MPSCCChan& chan, int ptr_) const
+SIODevice::CRName(const MPSCCChan& chan, uint ptr_) const
 {
 	assert(ptr_ < 8);
-	int idx = ptr_ * 2 + chan.id;
+	uint idx = ptr_ * 2 + chan.id;
 	assert(idx < countof(crnames));
 	return crnames[idx];
 }
 
 // 読み込みレジスタ名を返す
 const char *
-SIODevice::SRName(const MPSCCChan& chan, int ptr_) const
+SIODevice::SRName(const MPSCCChan& chan, uint ptr_) const
 {
 	assert(ptr_ < 8);
-	int idx = ptr_ * 2 + chan.id;
+	uint idx = ptr_ * 2 + chan.id;
 	assert(idx < countof(srnames));
 	return srnames[idx];
 }
@@ -350,7 +352,7 @@ SIODevice::WriteCtrl(MPSCCChan& chan, ui
 			WriteCR7(chan, data);
 			break;
 		 default:
-			VMPANIC("corrupted chan.ptr=%d", chan.ptr);
+			VMPANIC("corrupted chan.ptr=%u", chan.ptr);
 		}
 		// アクセス後は CR0 へ戻す
 		chan.ptr = 0;
@@ -468,13 +470,13 @@ SIODevice::WriteCR0(MPSCCChan& chan, uin
 	chan.ptr     =  data & MPSCC::CR0_PTR;
 
 	if (chan.crc_cmd != 0) {
-		putlog(0, "%s crc_cmd %d (NOT IMPLEMENTED)",
+		putlog(0, "%s crc_cmd %u (NOT IMPLEMENTED)",
 			CRName(chan, 0), chan.crc_cmd);
 	}
 
 	if (chan.cmd == 0) {
 		// コマンド0 ならレジスタ切り替え
-		putlog(3, "%s <- $%02x (ptr=%d)", CRName(chan, 0), data, chan.ptr);
+		putlog(3, "%s <- $%02x (ptr=%u)", CRName(chan, 0), data, chan.ptr);
 	} else {
 		// 0 以外ならコマンド発行
 		putlog(2, "%s <- $%02x", CRName(chan, 0), data);
@@ -512,7 +514,7 @@ SIODevice::WriteCR0(MPSCCChan& chan, uin
 		}
 		break;
 	 default:
-		VMPANIC("corrupted chan.cmd=%d", chan.cmd);
+		VMPANIC("corrupted chan.cmd=%u", chan.cmd);
 	}
 }
 
@@ -633,7 +635,7 @@ SIODevice::MonitorUpdate(Monitor *, Text
 	}
 	screen.Print(34, y, TA::OnOff((cr2a & MPSCC::CR2_PRIOSEL)), "PRIO");
 	// bit1,0 はよく分からん
-	screen.Print(39, y, "INT/DMA=%d", (cr2a & MPSCC::CR2_INTDMA));
+	screen.Print(39, y, "INT/DMA=%u", (cr2a & MPSCC::CR2_INTDMA));
 	y++;
 
 	// CR2B
@@ -688,7 +690,7 @@ SIODevice::MonitorUpdateCh(TextScreen& s
 	screen.Print(x, y++, "CR7/CR6: $%02x%02x", cr7, cr6);
 	screen.Print(x, y++, "SR0: $%02x", sr0);
 	screen.Print(x, y++, "SR1: $%02x", sr1);
-	screen.Print(x, y,   "RXbuf: %d", rxlen);
+	screen.Print(x, y,   "RXbuf: %u", rxlen);
 	int i;
 	for (i = 0; i < rxlen; i++) {
 		screen.Print(x + 9 + i * 4, y, "$%02x", chan.rxbuf[i]);
@@ -706,7 +708,7 @@ SIODevice::MonitorUpdateCh(TextScreen& s
 	y = ybase + 1;
 	x = xbase;
 	// CR0
-	screen.Print(x + 9, y, "CRC=%d", (cr0 >> 6));
+	screen.Print(x + 9, y, "CRC=%u", (cr0 >> 6));
 	static const char * const cmd_str[] = {
 	//   0123456789012345
 		"No operation",
@@ -719,8 +721,8 @@ SIODevice::MonitorUpdateCh(TextScreen& s
 		"End of Interrupt",
 	};
 	uint cmd = (cr0 >> 3) & 7;
-	screen.Print(x + 19, y, "CMD=%d(%s)", cmd, cmd_str[cmd]);
-	screen.Print(x + 43, y, "PTR=%d", (cr0 & 7));
+	screen.Print(x + 19, y, "CMD=%u(%s)", cmd, cmd_str[cmd]);
+	screen.Print(x + 43, y, "PTR=%u", (cr0 & 7));
 	y++;
 
 	// CR1
@@ -772,8 +774,8 @@ SIODevice::MonitorUpdateCh(TextScreen& s
 	screen.Print(x, y++, "CtrlAddr: $%08x", chan.ctrladdr);
 	y++;
 	screen.Print(x, y++, "Param:%13s", GetParamStr(chan).c_str());
-	screen.Print(x, y++, "Rx Bits/Frame:   %2d", chan.rxframebits);
-	screen.Print(x, y++, "Tx Bits/Frame:   %2d", chan.txframebits);
+	screen.Print(x, y++, "Rx Bits/Frame:   %2u", chan.rxframebits);
+	screen.Print(x, y++, "Tx Bits/Frame:   %2u", chan.txframebits);
 }
 
 // ペンディングのうち最も優先度の高い割り込み要因を返す
@@ -827,7 +829,7 @@ SIODevice::Tx(int ch, uint32 data)
 		keyboard->Command(data);
 		break;
 	 default:
-		VMPANIC("corrupted ch=%d", ch);
+		VMPANIC("corrupted ch=%u", ch);
 	}
 }