182 lines
4.8 KiB
C
182 lines
4.8 KiB
C
/***
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*bios.h - declarations for bios interface functions and supporting definitions
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*
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* Copyright (c) 1987-1988, Microsoft Corporation. All rights reserved.
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*
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*Purpose:
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* This file declares the constants, structures, and functions
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* used for accessing and using various BIOS interfaces.
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*
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*******************************************************************************/
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#ifndef NO_EXT_KEYS /* extensions enabled */
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#define _CDECL cdecl
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#else /* extensions not enabled */
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#define _CDECL
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#endif /* NO_EXT_KEYS */
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/* manifest constants for BIOS serial communications (RS-232) support */
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/* serial port services */
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#define _COM_INIT 0 /* init serial port */
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#define _COM_SEND 1 /* send character */
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#define _COM_RECEIVE 2 /* receive character */
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#define _COM_STATUS 3 /* get serial port status */
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/* serial port initializers. One and only one constant from each of the
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* following four groups - character size, stop bit, parity, and baud rate -
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* must be specified in the initialization byte.
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*/
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/* character size initializers */
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#define _COM_CHR7 2 /* 7 bits characters */
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#define _COM_CHR8 3 /* 8 bits characters */
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/* stop bit values - on or off */
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#define _COM_STOP1 0 /* 1 stop bit */
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#define _COM_STOP2 4 /* 2 stop bits */
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/* parity initializers */
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#define _COM_NOPARITY 0 /* no parity */
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#define _COM_ODDPARITY 8 /* odd parity */
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#define _COM_EVENPARITY 24 /* even parity */
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/* baud rate initializers */
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#define _COM_110 0 /* 110 baud */
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#define _COM_150 32 /* 150 baud */
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#define _COM_300 64 /* 300 baud */
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#define _COM_600 96 /* 600 baud */
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#define _COM_1200 128 /* 1200 baud */
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#define _COM_2400 160 /* 2400 baud */
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#define _COM_4800 192 /* 4800 baud */
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#define _COM_9600 224 /* 9600 baud */
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/* manifest constants for BIOS disk support */
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/* disk services */
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#define _DISK_RESET 0 /* reset disk controller */
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#define _DISK_STATUS 1 /* get disk status */
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#define _DISK_READ 2 /* read disk sectors */
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#define _DISK_WRITE 3 /* write disk sectors */
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#define _DISK_VERIFY 4 /* verify disk sectors */
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#define _DISK_FORMAT 5 /* format disk track */
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/* struct used to send/receive information to/from the BIOS disk services */
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#ifndef NO_EXT_KEYS /* extensions must be enabled */
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#ifndef _DISKINFO_T_DEFINED
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struct diskinfo_t {
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unsigned drive;
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unsigned head;
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unsigned track;
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unsigned sector;
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unsigned nsectors;
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void far *buffer;
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};
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#define _DISKINFO_T_DEFINED
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#endif
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#endif /* NO_EXT_KEYS */
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/* manifest constants for BIOS keyboard support */
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/* keyboard services */
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#define _KEYBRD_READ 0 /* read next character from keyboard */
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#define _KEYBRD_READY 1 /* check for keystroke */
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#define _KEYBRD_SHIFTSTATUS 2 /* get current shift key status */
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/* manifest constants for BIOS printer support */
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/* printer services */
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#define _PRINTER_WRITE 0 /* write character to printer */
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#define _PRINTER_INIT 1 /* intialize printer */
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#define _PRINTER_STATUS 2 /* get printer status */
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/* manifest constants for BIOS time of day support */
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/* time of day services */
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#define _TIME_GETCLOCK 0 /* get current clock count */
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#define _TIME_SETCLOCK 1 /* set current clock count */
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#ifndef _REGS_DEFINED
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/* word registers */
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struct WORDREGS {
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unsigned int ax;
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unsigned int bx;
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unsigned int cx;
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unsigned int dx;
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unsigned int si;
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unsigned int di;
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unsigned int cflag;
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};
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/* byte registers */
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struct BYTEREGS {
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unsigned char al, ah;
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unsigned char bl, bh;
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unsigned char cl, ch;
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unsigned char dl, dh;
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};
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/* general purpose registers union -
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* overlays the corresponding word and byte registers.
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*/
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union REGS {
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struct WORDREGS x;
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struct BYTEREGS h;
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};
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/* segment registers */
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struct SREGS {
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unsigned int es;
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unsigned int cs;
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unsigned int ss;
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unsigned int ds;
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};
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#define _REGS_DEFINED
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#endif /* _REGS_DEFINED */
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/* function prototypes */
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unsigned _CDECL _bios_equiplist(void);
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unsigned _CDECL _bios_keybrd(unsigned);
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unsigned _CDECL _bios_memsize(void);
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unsigned _CDECL _bios_printer(unsigned, unsigned, unsigned);
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unsigned _CDECL _bios_serialcom(unsigned, unsigned, unsigned);
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unsigned _CDECL _bios_timeofday(unsigned, long *);
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int _CDECL int86(int, union REGS *, union REGS *);
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int _CDECL int86x(int, union REGS *, union REGS *, struct SREGS *);
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#ifndef NO_EXT_KEYS /* extensions must be enabled */
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unsigned _CDECL _bios_disk(unsigned, struct diskinfo_t *);
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#endif /* NO_EXT_KEYS */
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