/*  bios.h - bios defines						*/

/*
** 
** MODIFICATION HISTORY
**	14 Oct 85	KTB	create from fs.h
**
**
** NAMES
** 
** 	SCC	Steve C. Cavender
**	KTB	Karl T. Braun (kral)
*/

#ifndef	M0101080401
#define	M0101080401	1
#endif


/*
**  externs declarations
*/

EXTERN	BYTE	INP() ;
EXTERN	VOID	OUTP() ;

/*
**  Bios Function Numbers
*/

#define	B_MDCHG		9		/*  media change		*/

/*
** BIOS level character device handles
*/

#if	M0101080401
#define	BFHPRN	0
#define	BFHAUX	1
#define	BFHCON	2
#define	BFHCLK	-1
#define	BFHMOU	-2
#else
#define	BFHPRN	0
#define	BFHAUX	1
#define	BFHCON	2
#define	BFHCLK	3
#define	BFHMOU	4
#endif


/*
**  return codes
*/

#define	DEVREADY	-1L		/*  device ready		*/
#define	DEVNOTREADY	0L		/*  device not ready		*/
#define	MEDIANOCHANGE	0L		/*  media def has not changed	*/
#define	MEDIAMAYCHANGE	1L		/*  media may have changed	*/
#define	MEDIACHANGE	2L		/*  media def has changed	*/

/*
**  code macros
*/

#define	ADDRESS_OF(x)	x
#define	INP		inp
#define	OUTP		outp


/*
**  bios data types 
*/


	/*
	**  ISR - Interrupt Service Routines.
	**	These routines currently do not return anything important.  In
	**	future versions, they will return boolean values that indicate
	**	whether a displatch should occurr (TRUE) or not.
	*/

	typedef	BOOLEAN	ISR ;		/*  interrupt service routine	*/
	typedef	ISR	(*PISR)() ;	/*  pointer to isr routines	*/

	/*
	**  SSN - Sequential Sector Numbers
	**	At the outermost level of support, the disks look like an
	**	array of sequential logical sectors.  The range of SSNs are
	**	from 0 to n-1, where n is the number of logical sectors on
	**	the disk.  (logical sectors do not necessarilay have to be
	**	the same size as a physical sector.
	*/

	typedef	long	SSN ;	


/*
**  Data Structures
*/

	/*
	**  PD - Process Descriptor
	*/

#ifndef	PD
#define PD struct _pd

	PD	
	{
	/* 0x00 */
		long	p_lowtpa;
		long	p_hitpa;
		long	p_tbase;
		long	p_tlen;
	/* 0x10 */
		long	p_dbase;
		long	p_dlen;
		long	p_bbase;
		long	p_blen;
	/* 0x20 */
		long	p_0fill[3] ;
		char	*p_env;		
	/* 0x30 */
		long	p_1fill[20] ;
	/* 0x80 */
		char	p_cmdlin[0x80];
	} ;
#endif



	/*
	**  BPB - Bios Parameter Block
	*/

#define BPB struct _bpb

	BPB /* bios parameter block */
	{
		int	recsiz;		/* sector size in bytes */
		int	clsiz;		/* cluster size in sectors */
		int 	clsizb;		/* cluster size in bytes */
		int	rdlen;		/* root directory length in records */
		int	fsiz;		/* fat size in records */
		int	fatrec;		/* first fat record (of last fat) */
		int	datrec;		/* first data record */
		int	numcl;		/* number of data clusters available */
		int	b_flags;
	} ;
	

	/* 
	**  flags for BPB
	*/

#define	B_16	1			/* device has 16-bit FATs	*/
#define	B_FIX	2			/* device has fixed media	*/

	/*
	**  BCB - Buffer Control Block
	*/

#ifndef	BCB

#define BCB struct _bcb

	
	BCB
	{
		BCB	*b_link;	/*  next bcb			*/
		int	b_bufdrv;	/*  unit for buffer		*/
		int	b_buftyp;	/*  buffer type			*/
		int	b_bufrec;	/*  record number		*/
		BOOLEAN	b_dirty;	/*  true if buffer dirty	*/
		long	b_dm;		/*  reserved for file system	*/
		BYTE	*b_bufr;	/*  pointer to buffer		*/
	} ;

	/*
	**  buffer type values
	*/

#define	BT_FAT		0		/*  fat buffer			*/
#define	BT_ROOT		1		/*  root dir buffer		*/
#define	BT_DIR		2		/*  other dir buffer		*/
#define	BT_DATA		3		/*  data buffer			*/

/*
**  buffer list indexes
*/

#define	BI_FAT		0		/*  fat buffer list		*/
#define	BI_ROOT		1		/*  root dir buffer list	*/
#define	BI_DIR		1		/*  other dir buffer list	*/
#define	BI_DATA		1		/*  data buffer list		*/


#endif


	/*
	**  MD - Memory Descriptor
	*/

#define MD struct _md

	MD
	{
		MD	*m_link;
		long	m_start;
		long	m_length;
		PD	*m_own;
	} ;

	/*
	**  fields in Memory Descriptor
	*/

#define MF_FREE 1


	/*
	**  MPB - Memory Partition Block
	*/

#define MPB struct _mpb

	MPB 
	{
		MD	*mp_mfl;
		MD	*mp_mal;
		MD	*mp_rover;
	} ;




/* For BIOS calls... */

#define	date_time(op,var)	trap13(0x11,(op),(var))
#define	GET_TIME	0
#define	SET_TIME	1
#define	GET_DATE	2
#define	SET_DATE	3



/*
**  VME/10 machine dependent stuff.
*/

#define	IVNKBD	0x42		/*  keyboard interrupt vector number	*/
#define	IVNDSK	0x44		/*  disk controller interrupt vec no	*/
#define	IVNSER	0x45		/*  serial port interrupt vector number	*/

#define	IVNABT	0x4e		/*  abort button interrupt vector no	*/