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-rw-r--r--src/mess/machine/pc_turbo.h15
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diff --git a/src/mess/machine/pc_turbo.h b/src/mess/machine/pc_turbo.h
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+/*********************************************************************
+
+ pc_turbo.h
+
+ The PC "turbo" button
+
+**********************************************************************/
+
+#ifndef PC_TURBO_H
+#define PC_TURBO_H
+
+int pc_turbo_setup(running_machine &machine, device_t *cpu, const char *port, int mask, double off_speed, double on_speed);
+
+
+#endif /* PC_TURBO_H */