--- nono/vm/bankram.cpp	2026/04/29 17:05:43	1.1.1.5
+++ nono/vm/bankram.cpp	2026/04/29 17:06:01	1.1.1.7
@@ -13,6 +13,7 @@
 
 #include "bankram.h"
 #include "config.h"
+#include "mpu.h"
 
 // コンストラクタ
 BankRAMDevice::BankRAMDevice(uint objid_, int ram_size_MB)
@@ -36,11 +37,12 @@ BankRAMDevice::Init()
 {
 	ram.reset(new(std::nothrow) uint8[ram_size]);
 	if ((bool)ram == false) {
-		errno = ENOMEM;
-		warn("BankRAM(%u bytes)", ram_size);
+		warnx("Could not allocate %u bytes at %s", ram_size, __method__);
 		return false;
 	}
 
+	wait = busdata::Wait(1 * mpu->GetClock_tsec());
+
 	return true;
 }
 
@@ -76,7 +78,7 @@ BankRAMDevice::Read(busaddr addr)
 
 	data  = *(uint32 *)&ram[offset & ~3U];
 	putlog(4, "$%06x ($%06x) -> $%08x", addr.Addr(), offset, data.Data());
-	data |= busdata::Wait(1);
+	data |= wait;
 	data |= BusData::Size4;
 	return data;
 }
@@ -107,7 +109,7 @@ BankRAMDevice::Write(busaddr addr, uint3
 		}
 	}
 
-	busdata r = busdata::Wait(1);
+	busdata r = wait;
 	r |= BusData::Size4;
 	return r;
 }