M src/lr35902/lr35902.c → src/lr35902/lr35902.c

@@ -148,8 +148,15 @@ }
 }
 
 void LR35902Run(struct LR35902Core* cpu) {
-	while (cpu->cycles < cpu->nextEvent) {
+	while (true) {
 		_LR35902Step(cpu);
+		if (cpu->cycles >= cpu->nextEvent) {
+			break;
+		} else if (cpu->executionState < LR35902_CORE_EXECUTE) {
+			// Silly hack: keep us from calling step if we know the next step is a no-op
+			++cpu->cycles;
+			++cpu->executionState;
+		}
 	}
 	cpu->irqh.processEvents(cpu);
 }

M src/lr35902/lr35902.h → src/lr35902/lr35902.h

@@ -36,16 +36,16 @@ };
 #pragma pack(pop)
 
 enum LR35902ExecutionState {
-	LR35902_CORE_FETCH = 0,
-	LR35902_CORE_IDLE_0,
-	LR35902_CORE_IDLE_1,
-	LR35902_CORE_EXECUTE = 3,
+	LR35902_CORE_FETCH = 3,
+	LR35902_CORE_IDLE_0 = 0,
+	LR35902_CORE_IDLE_1 = 1,
+	LR35902_CORE_EXECUTE = 2,
 
-	LR35902_CORE_MEMORY_LOAD = 4,
-	LR35902_CORE_MEMORY_STORE = 8,
-	LR35902_CORE_READ_PC = 12,
-	LR35902_CORE_STALL = 16,
-	LR35902_CORE_OP2 = 20
+	LR35902_CORE_MEMORY_LOAD = 7,
+	LR35902_CORE_MEMORY_STORE = 11,
+	LR35902_CORE_READ_PC = 15,
+	LR35902_CORE_STALL = 19,
+	LR35902_CORE_OP2 = 23
 };
 
 struct LR35902Memory {