--- nono/vm/sysport.cpp	2026/04/29 17:04:50	1.1.1.5
+++ nono/vm/sysport.cpp	2026/04/29 17:04:56	1.1.1.7
@@ -13,9 +13,10 @@
 std::unique_ptr<SysportDevice> gSysport;
 
 SysportDevice::SysportDevice()
+	: inherited("SystemPort")
 {
-	logname = "sysport";
-	devname = "Sysport";
+	AddAlias("SysPort");
+
 	devaddr = baseaddr;
 	devlen  = 0x2000;
 }
@@ -27,8 +28,10 @@ SysportDevice::~SysportDevice()
 void
 SysportDevice::ResetHard()
 {
+	sysport.contrast = 0;	// XXX 未調査
 	sysport.ram_wait = 0;
 	sysport.rom_wait = 0;
+	sysport.key_ctrl = false;
 }
 
 uint64
@@ -87,8 +90,7 @@ SysportDevice::Write(uint32 offset, uint
 		if ((data & 0x06)) {
 			putlog(0, "$E8E007 未サポート書き込み $%02x", data);
 		}
-		// bit3 KEY CTRL は MFP で管理する
-		gMFP->SetKeyCtrl(data & 0x08);
+		sysport.key_ctrl = (data & 0x08);
 		break;
 
 	 case SYSPORT::WAIT: