+//#define X6502_IRQBegin X6502_IRQBegin_a
+//#define X6502_IRQEnd X6502_IRQEnd_a
+#define X6502_IRQBegin(w) nes_registers[4]|=w<<8
+#define X6502_IRQEnd(w) nes_registers[4]&=~(w<<8)
+#define X6502_Rebase X6502_Rebase_a
+#define X6502_GetCycleCount() ((int32)nes_registers[7]>>16)