/*
 * vboot - a standalone booter for 
 *	Godbout's 68000 board
 * 	& Duals SIO4 addressed at 0x20
 *	& Morrow's DJDMA 
 *	& Morrow's HDDMA
 */


#define K68		/* 68000 chip */

#ifdef K68

#define lobyte(a)  ((long) (a) >>  0)
#define midbyte(a) ((long) (a) >>  8)
#define hibyte(a)  ((long) (a) >> 16)


#endif


#define YES 1
#define NO 0
#define CHANNEL 0x50
#define BUSY 0
#define ACTIVE 0

/*
 * format of sector 0 on Morrow disks
 */


struct block0	
	{
	short	

		ncyl,		/* cylinders per volume */
		nhead,		/* number of heads per drive */
		nsect,		/* sectors per track */
		norigin,	/* first sector's number */
		interleave,	/* 1 is the default */
				/* sector interleave */
		bps,		/* bytes per sector */
		delay,		/* step delay, settle delay in mS */
		precomp,	/* first cylinder of write precompensation */
		lowcurrent,	/* first cylinder of low current */

		bootcyl,	/* cylinder where the boot image starts */
		boothead,	/* head where the boot image starts */
		bootsect,	/* sector where the boot image starts */
		bootcount,	/* number of sectors in the boot image */

		parkcyl;	/* parking for shipping */

	char extra [1000];
	};