--- nono/vm/sram.cpp	2026/04/29 17:05:17	1.1.1.11
+++ nono/vm/sram.cpp	2026/04/29 17:05:24	1.1.1.12
@@ -97,7 +97,7 @@ SRAMDevice::SyncRAMSize()
 }
 
 // アドレスデコーダ
-inline uint64
+inline uint32
 SRAMDevice::Decoder(uint32 addr) const
 {
 	uint32 offset = addr - baseaddr;
@@ -106,7 +106,7 @@ SRAMDevice::Decoder(uint32 addr) const
 	return offset;
 }
 
-uint64
+busdata
 SRAMDevice::Read8(uint32 addr)
 {
 	uint32 offset = Decoder(addr);
@@ -118,7 +118,7 @@ SRAMDevice::Read8(uint32 addr)
 	return data;
 }
 
-uint64
+busdata
 SRAMDevice::Read16(uint32 addr)
 {
 	uint32 offset = Decoder(addr);
@@ -130,7 +130,7 @@ SRAMDevice::Read16(uint32 addr)
 	return data;
 }
 
-uint64
+busdata
 SRAMDevice::Write8(uint32 addr, uint32 data)
 {
 	uint32 offset = Decoder(addr);
@@ -146,7 +146,7 @@ SRAMDevice::Write8(uint32 addr, uint32 d
 	return 0;
 }
 
-uint64
+busdata
 SRAMDevice::Write16(uint32 addr, uint32 data)
 {
 	uint32 offset = Decoder(addr);
@@ -162,7 +162,7 @@ SRAMDevice::Write16(uint32 addr, uint32
 	return 0;
 }
 
-uint64
+busdata
 SRAMDevice::Peek8(uint32 addr)
 {
 	uint32 offset = Decoder(addr);
@@ -170,7 +170,7 @@ SRAMDevice::Peek8(uint32 addr)
 	return Get8(offset);
 }
 
-uint64
+bool
 SRAMDevice::Poke8(uint32 addr, uint32 data)
 {
 	// WriteEnable() に関わらず変更する。
@@ -180,7 +180,7 @@ SRAMDevice::Poke8(uint32 addr, uint32 da
 		uint32 offset = Decoder(addr);
 		mem[offset] = data;
 	}
-	return 0;
+	return true;
 }
 
 void