#define	WorldSize	30000	/* Max 2^16 = 65536 */

#define	InstEmpty	0x80
#define	InstReserved	0x81
#define	InstLabel	0x00
#define	InstNop1	0x01
#define	InstInc		0x02
#define	InstDec		0x03
#define	InstStore	0x04
#define	InstLoad	0x05
#define	InstAdd		0x06
#define	InstSub		0x07
#define	InstJumpF	0x08
#define	InstJumpB	0x09
#define	InstFindF	0x0a
#define	InstFindB	0x0b
#define	InstCallF	0x0c
#define	InstCallB	0x0d
#define	InstReturn	0x0f
#define	InstCellDiv	0x1f
#define	InstSave	0x2f
#define	InstRestore	0x3f
#define	InstSkipZ	0x4f
#define	InstSkipC	0x5f
#define	InstAlloc	0x6f
#define	InstHalt	0x7f

#define	InstNoArg(x)	(((x)&0x0f)==0x0f)
#define	InstLabelArg(x)	((x)>=InstJumpF)

#define	LabelStart	0x10
#define	LabelEnd	0x20
#define	RegAx		0x00
#define	RegBx		0x10
#define	RegCx		0x20
#define	RegDx		0x30
#define	MemAx		0x40
#define	MemBx		0x50
#define	MemCx		0x60
#define	MemDx		0x70

#define	ArgRegister(x)	((x)<MemAx)

typedef struct org_rec {
	unsigned long	id;	/* time stamp */
	unsigned long	specie;
	unsigned short	start, length;	/* start address and length */
	unsigned short	pc;	/* program counter */
	unsigned short	ax, bx, cx, dx;	/* 16 bits registers */
	unsigned short	pcy, ay, by, cy, dy;
	unsigned short	a_start, a_length;	/* allocated memory */
	struct org_rec	*next, *prev;
} Organism;