/* * tunable variables */#define	NBUF	15		/* size of buffer cache */#define	NINODE	100		/* number of in core inodes */#define	NFILE	100		/* number of in core file structures */#define	NMOUNT	5		/* number of mountable file systems */#define	NEXEC	3		/* number of simultaneous exec's */#define	MAXMEM	(64*32)		/* max core per process - first # is Kw */#define	SSIZE	20		/* initial stack size (*64 bytes) */#define	SINCR	20		/* increment of stack (*64 bytes) */#define	NOFILE	15		/* max open files per process */#define	CANBSIZ	256		/* max size of typewriter line */#define	CMAPSIZ	100		/* size of core allocation area */#define	SMAPSIZ	100		/* size of swap allocation area */#define	NCALL	20		/* max simultaneous time callouts */#define	NPROC	50		/* max number of processes */#define	NTEXT	40		/* max number of pure texts */#define	NCLIST	100		/* max total clist size */#define	HZ	60		/* Ticks/second of the clock *//* * priorities * probably should not be * altered too much */#define	PSWP	-100#define	PINOD	-90#define	PRIBIO	-50#define	PPIPE	1#define	PWAIT	40#define	PSLEP	90#define	PUSER	100/* * signals * dont change */#define	NSIG	20#define		SIGHUP	1	/* hangup */#define		SIGINT	2	/* interrupt (rubout) */#define		SIGQIT	3	/* quit (FS) */#define		SIGINS	4	/* illegal instruction */#define		SIGTRC	5	/* trace or breakpoint */#define		SIGIOT	6	/* iot */#define		SIGEMT	7	/* emt */#define		SIGFPT	8	/* floating exception */#define		SIGKIL	9	/* kill */#define		SIGBUS	10	/* bus error */#define		SIGSEG	11	/* segmentation violation */#define		SIGSYS	12	/* sys */#define		SIGPIPE	13	/* end of pipe *//* * fundamental constants * cannot be changed */#define	USIZE	16		/* size of user block (*64) */#define	NULL	0#define	NODEV	(-1)#define	ROOTINO	1		/* i number of all roots */#define	DIRSIZ	14		/* max characters per directory *//* * structure to access an * integer in bytes */struct{	char	lobyte;	char	hibyte;};/* * structure to access an integer */struct{	int	integ;};/* * Certain processor registers */#define PS	0177776#define KL	0177560#define SW	0177570