dos_compilers/Microsoft QuickC v2/include/BIOS.H

/***
*bios.h - declarations for bios interface functions and supporting definitions
*
*	Copyright (c) 1987-1989, Microsoft Corporation.  All rights reserved.
*
*Purpose:
*	This file declares the constants, structures, and functions
*	used for accessing and using various BIOS interfaces.
*
****/


#ifndef NO_EXT_KEYS	/* extensions enabled */
	#define _CDECL	cdecl
#else	/* extensions not enabled */
	#define _CDECL
#endif	/* NO_EXT_KEYS */

/* manifest constants for BIOS serial communications (RS-232) support */

/* serial port services */

#define _COM_INIT		0	/* init serial port */
#define _COM_SEND		1	/* send character */
#define _COM_RECEIVE		2	/* receive character */
#define _COM_STATUS		3	/* get serial port status */

/* serial port initializers.  One and only one constant from each of the
 * following four groups - character size, stop bit, parity, and baud rate -
 * must be specified in the initialization byte.
 */

/* character size initializers */

#define _COM_CHR7		2	/* 7 bits characters */
#define _COM_CHR8		3	/* 8 bits characters */

/* stop bit values - on or off */

#define _COM_STOP1		0	/* 1 stop bit */
#define _COM_STOP2		4	/* 2 stop bits */

/*  parity initializers */

#define _COM_NOPARITY		0	/* no parity */
#define _COM_ODDPARITY		8	/* odd parity */
#define _COM_EVENPARITY 	24	/* even parity */

/*  baud rate initializers */

#define _COM_110		0	/* 110 baud */
#define _COM_150		32	/* 150 baud */
#define _COM_300		64	/* 300 baud */
#define _COM_600		96	/* 600 baud */
#define _COM_1200		128 	/* 1200 baud */
#define _COM_2400		160 	/* 2400 baud */
#define _COM_4800		192 	/* 4800 baud */
#define _COM_9600		224 	/* 9600 baud */


/* manifest constants for BIOS disk support */

/* disk services */

#define _DISK_RESET		0	/* reset disk controller */
#define _DISK_STATUS		1	/* get disk status */
#define _DISK_READ		2	/* read disk sectors */
#define _DISK_WRITE		3	/* write disk sectors */
#define _DISK_VERIFY		4	/* verify disk sectors */
#define _DISK_FORMAT		5	/* format disk track */

/* struct used to send/receive information to/from the BIOS disk services */

#ifndef NO_EXT_KEYS		/* extensions must be enabled */

#ifndef _DISKINFO_T_DEFINED

struct diskinfo_t {
	unsigned drive;
	unsigned head;
	unsigned track;
	unsigned sector;
	unsigned nsectors;
	void far *buffer;
	};

#define _DISKINFO_T_DEFINED

#endif

#endif /* NO_EXT_KEYS */


/* manifest constants for BIOS keyboard support */

/* keyboard services */

#define _KEYBRD_READ		0	/* read next character from keyboard */
#define _KEYBRD_READY		1	/* check for keystroke */
#define _KEYBRD_SHIFTSTATUS	2	/* get current shift key status */

/* services for enhanced keyboards */

#define _NKEYBRD_READ		0x10	/* read next character from keyboard */
#define _NKEYBRD_READY		0x11	/* check for keystroke */
#define _NKEYBRD_SHIFTSTATUS	0x12	/* get current shift key status */


/* manifest constants for BIOS printer support */

/* printer services */

#define _PRINTER_WRITE		0	/* write character to printer */
#define _PRINTER_INIT		1	/* intialize printer */
#define _PRINTER_STATUS 	2	/* get printer status */


/* manifest constants for BIOS time of day support */

/* time of day services */

#define _TIME_GETCLOCK		0	/* get current clock count */
#define _TIME_SETCLOCK		1	/* set current clock count */


#ifndef _REGS_DEFINED

/* word registers */

struct WORDREGS {
	unsigned int ax;
	unsigned int bx;
	unsigned int cx;
	unsigned int dx;
	unsigned int si;
	unsigned int di;
	unsigned int cflag;
	};

/* byte registers */

struct BYTEREGS {
	unsigned char al, ah;
	unsigned char bl, bh;
	unsigned char cl, ch;
	unsigned char dl, dh;
	};

/* general purpose registers union -
 *  overlays the corresponding word and byte registers.
 */

union REGS {
	struct WORDREGS x;
	struct BYTEREGS h;
	};

/* segment registers */

struct SREGS {
	unsigned int es;
	unsigned int cs;
	unsigned int ss;
	unsigned int ds;
	};

#define _REGS_DEFINED

#endif /* _REGS_DEFINED */


/* function prototypes */

unsigned _CDECL _bios_equiplist(void);
unsigned _CDECL _bios_keybrd(unsigned);
unsigned _CDECL _bios_memsize(void);
unsigned _CDECL _bios_printer(unsigned, unsigned, unsigned);
unsigned _CDECL _bios_serialcom(unsigned, unsigned, unsigned);
unsigned _CDECL _bios_timeofday(unsigned, long *);
int _CDECL int86(int, union REGS *, union REGS *);
int _CDECL int86x(int, union REGS *, union REGS *, struct SREGS *);

#ifndef NO_EXT_KEYS		/* extensions must be enabled */

unsigned _CDECL _bios_disk(unsigned, struct diskinfo_t *);

#endif /* NO_EXT_KEYS */