/* $Id: mac-mdr.h,v 1.6 89/05/06 17:13:34 lee Exp $
 * mdr.h - header file for stuff that uses the midi driver
 *
 * Steven A. Falco  7/30/87
 * $Log:	mac-mdr.h,v $
 * Revision 1.6  89/05/06  17:13:34  lee
 * rel. to comp.sources.misc
 * 
 */

#define MIDI_NE		0		/* queue has 1 or more bytes available */
#define MIDI_EM		(-1)	/* queue is empty */

extern void midi_init();	/* set up hardware & software */
extern void midi_reset();	/* unset - very important to avoid crashes */
extern void midi_tx();		/* send a byte (but declare arg as a long) */
extern long midi_rx();		/* get a byte (returns -1 on "nothing available" */
extern char midi_txst;		/* transmit queue state (flags above) */
extern char midi_rxst;		/* receive queue state */
extern long midi_time;		/* relative time in mS (5 mS granularity) */