/* Environment and associated Z-System structures */

#ifndef ECOC
#define package char
#define short char
#else
typedef char package;
#endif

/* File control block */

struct zfcb {
	short	drive;		/* drive number [1..16] */
	char	fname[8];	/* file name */
	char	ftype[3];	/* file type */
	short	extent;		/* extent number [0..1f] */
	short	user;		/* s1 - user number in zsdos */
	short	dmod;		/* s2 - data module number */
	short	rec;		/* record number */
	int	alloc[8];	/* allocation block map for the extent */
	short	nextrec;	/* next sequential record to read/write */
	short	rrec[3];	/* random record number */
};

/* Multiple command line buffer */

struct	mcl {
	char	*first;		/* pointer to first char in command */	
	short	bufsiz;		/* length of buffer in bytes */
	short	count;		/* length of line read by bdos */
	char	cline;		/* first char in command line */
};

/* Crt entries within ENV */

struct	crt {
	short	crt0wid;	/* width of crt 0 in chars */
	short	crt0ht;		/* hight of crt 0 in rows */
	short	crt0tht;	/* number of usable text lines on crt 0 */
};

/* Printer entries within ENV */

struct	printer {
	short	width;		/* printer 0 width in chars */
	short	height;		/* printer 0 page length */
	short	text;		/* printer 0 number of text lines per page */
	short	feedok;		/* form feed flag - 1 = form feed ok */
};

/* ...and finally the ENV itself */

struct	env {
	short	jp;
	int	*cbios;		/* NZCOM only - others null */
	char	envstr[5];	/* Z3ENV string */
	short	envtyp;		/* environment type - msb set if extended */
	short	*path;		/* address of path */
	short	pathsize;	/* number of elements in path */
	package *rcp;		/* RCP address */
	short	rcpsize;	/* size of RCP in records */	
	package *iop;		/* IOP address */
	short	iopsize;	/* size of IOP in records */
	package *fcp;		/* FCP address */
	short	fcpsize;	/* size of FCP in records */
	package *ndr;		/* NDR address */
	short	ndrsize;	/* size of NDR in 18 byte entries */
	struct	mcl *z3mcl;	/* multiple command line buffer */
	short	mclsize;	/* command line buffer size */	
	package *z3env;		/* Self reference address */
	short	envsize;	/* Size of ENV in records */
	package *shstk; 	/* address of shell stack */
	short	shstks;		/* number of entries in shell stack */
	short	shsize;		/* size of a shell stack entry */
	package *z3msg;		/* pointer to message buffer */
	struct	zfcb *z3fcb;	/* zcpr3 external fcb address */
	int	*extstk;	/* command processor external stack */
	short	quiet;		/* quiet flag */
	short	*wheel;		/* wheel byte pointer */	
	short	speed;		/* processor speed in mhz */
	short	maxdisk;	/* highest valid disk number */
	short	maxuser;	/* highest allowed user number */
	short	duok;		/* 1=ok to accept du:, else 0 */
	short	curcrt;		/* current crt number */
	short	curlst;		/* current printer number */
	struct	crt crt0;	/* crt size specs */
	int	okdvct;		/* vector of valid drives */
	short	spare1;		/* currently unused */
	struct	printer lpt0;	/* printer 0 control */
	struct	printer lpt1;	/* printer 1 control */
	package *ccp;		/* base address of ccp */
	short	ccpsize;	/* size of ccp in records */
	package *dos;		/* base address of bdos - record aligned */
	short	dossize;	/* size of dos in records */
	package *bio;		/* bios base address */
	char	shvarn[8];	/* shell variable file name */
	char	shvart[3];	/* shell variable file type */
	char	sys1file[11];	/* system file 1 */
	char	sys2file[11];	/* system file 2 */
	char	sys3file[11];	/* system file 3 */
	char	sys4file[11];	/* system file 4 */
	short	zrpdrv;		/* zrdos public drive map */
	short	zrpuser;	/* zrdos public user map */
};