--- nono/vm/sysport.cpp	2026/04/29 17:04:36	1.1.1.3
+++ nono/vm/sysport.cpp	2026/04/29 17:04:42	1.1.1.4
@@ -6,6 +6,8 @@
 
 #include "sysport.h"
 #include "mfp.h"
+#include "ram.h"
+#include "romimg_x68k.h"
 #include "sram.h"
 
 SysportDevice::SysportDevice()
@@ -20,6 +22,13 @@ SysportDevice::~SysportDevice()
 {
 }
 
+void
+SysportDevice::ResetHard()
+{
+	sysport.ram_wait = 0;
+	sysport.rom_wait = 0;
+}
+
 uint64
 SysportDevice::Read(uint32 addr)
 {
@@ -81,10 +90,22 @@ SysportDevice::Write(uint32 addr, uint32
 		break;
 
 	 case SYSPORT::WAIT:
+	 {
 		// 設定値で保持
 		sysport.rom_wait = data >> 4;
 		sysport.ram_wait = data;
+
+		// ROM に指示。常に設定値 + 2 でよい
+		gIPLROM1->SetWait(sysport.rom_wait + 2);
+		gIPLROM2->SetWait(sysport.rom_wait + 2);
+		gCGROM->SetWait(sysport.rom_wait + 2);
+		// RAM に指示。InsideOut p.124
+		int wait = sysport.ram_wait;
+		if (wait > 0)
+			wait += 2;
+		gRAM->SetWait(wait);
 		break;
+	 }
 
 	 case SYSPORT::MPU:
 		break;