132 lines
5.3 KiB
C
132 lines
5.3 KiB
C
/* bios.h - BIOS functions
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* $Version: 1.2 $
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* Copyright 1990,91 Intel Corporation, ALL RIGHTS RESERVED.
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*/
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#ifndef _biosh
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#define _biosh
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#pragma fixedparams("_bios_disk", "_bios_equiplist", "_bios_keybrd")
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#pragma fixedparams("_bios_memsize", "_bios_printer", "_bios_serialcom")
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#pragma fixedparams("_bios_timeofday")
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/* BIOS COM port configuration constants */
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#define _COM_INIT 0x00 /* Initialize the com port */
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#define _COM_SEND 0x01 /* Send a byte to the com port */
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#define _COM_RECEIVE 0x02 /* Get a byte from the com port */
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#define _COM_STATUS 0x03 /* Get status from the com port */
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#define _COM_110 0x00 /* Baud rate: 110 */
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#define _COM_150 0x20 /* Baud rate: 150 */
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#define _COM_300 0x40 /* Baud rate: 300 */
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#define _COM_600 0x60 /* Baud rate: 600 */
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#define _COM_1200 0x80 /* Baud rate: 1200 */
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#define _COM_2400 0xA0 /* Baud rate: 2400 */
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#define _COM_4800 0xC0 /* Baud rate: 4800 */
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#define _COM_9600 0xE0 /* Baud rate: 9600 */
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#define _COM_CHR7 0x02 /* Seven data bits per character */
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#define _COM_CHR8 0x03 /* Eight data bits per character */
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#define _COM_NOPARITY 0x00 /* No parity check */
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#define _COM_ODDPARITY 0x08 /* Check for odd parity */
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#define _COM_EVENPARITY 0x18 /* Check for even parity */
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#define _COM_STOP1 0x00 /* One stop bit */
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#define _COM_STOP2 0x04 /* Two stop bits */
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/* BIOS disk operations */
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#define _DISK_RESET 0x00 /* Reset the disk controller */
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#define _DISK_STATUS 0x01 /* Get status from the disk */
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#define _DISK_READ 0x02 /* Read sectors from the disk */
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#define _DISK_WRITE 0x03 /* Write sectors to the disk */
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#define _DISK_VERIFY 0x04 /* Verify disk sectors */
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#define _DISK_FORMAT 0x05 /* Format a disk track */
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#ifndef _FAR
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#define _FAR
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#define _HUGE
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#define _NEAR
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#endif
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/* BIOS disk structure */
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#ifndef _diskinfo_t
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#pragma align (diskinfo_t)
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struct diskinfo_t {
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unsigned short drive;
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unsigned short head;
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unsigned short track;
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unsigned short sector;
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unsigned short nsectors;
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void _FAR *buffer;
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};
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#define _diskinfo_t
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#define _DISKINFO_T_DEFINED
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#endif /* _diskinfo_t */
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/* BIOS keyboard operations */
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#define _KEYBRD_READ 0x00 /* Get next character from keyboard */
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#define _KEYBRD_READY 0x01 /* See if a keystroke is ready */
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#define _KEYBRD_SHIFTSTATUS 0x02 /* Get status of shift key */
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/* BIOS enhanced keyboards operations */
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#define _NKEYBRD_READ 0x10 /* Get next character from keyboard */
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#define _NKEYBRD_READY 0x11 /* See if a keystroke is ready */
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#define _NKEYBRD_SHIFTSTATUS 0x12 /* Get status of Shift key */
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/* BIOS printer operations */
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#define _PRINTER_WRITE 0x00 /* Write characters to the printer */
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#define _PRINTER_INIT 0x01 /* Initialize the printer */
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#define _PRINTER_STATUS 0x02 /* Get status from the printer */
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/* BIOS clock operations */
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#define _TIME_GETCLOCK 0x00 /* Get the clock counter */
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#define _TIME_SETCLOCK 0x01 /* Set the clock counter */
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/* Registers union - overlay the DWORD, WORD, and BYTE register
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* structures into the same memory area. Declaration of "eax" and "ax"
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* entries the same (unsigned) for ease of porting code using "ax". Also,
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* note the optional 16-bit implementation of 'x' field.
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*/
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#ifndef _regs
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#pragma align (DWORDREGS)
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#pragma align (WORDREGS)
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#pragma align (BYTEREGS)
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union REGS {
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struct DWORDREGS {unsigned eax, ebx, ecx, edx, esi,
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edi, cflag, eflags, ebp;} w;
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struct WORDREGS {unsigned ax, bx, cx, dx, si,
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di, cflag, flags, bp;} x;
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#if _ARCHITECTURE_ == 386 || _ARCHITECTURE_ == 486
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struct BYTEREGS {unsigned al:8, ah:8, :16, bl:8, bh:8, :16,
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cl:8, ch:8, :16, dl:8, dh:8, :16;} h;
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#else
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struct BYTEREGS {unsigned al:8, ah:8, bl:8, bh:8,
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cl:8, ch:8, dl:8, dh:8;} h;
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#endif
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};
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/* Selector/Segment register structure */
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#pragma align (SREGS)
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struct SREGS {unsigned short es, cs, ss, ds, fs, gs;};
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#define _regs
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#endif /* _regs */
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/*
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* Function prototypes
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*/
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unsigned int _bios_disk(unsigned, struct diskinfo_t *);
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unsigned int _bios_equiplist(void);
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unsigned int _bios_keybrd(unsigned);
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unsigned int _bios_memsize(void);
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unsigned int _bios_printer(unsigned, unsigned, unsigned);
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unsigned int _bios_serialcom(unsigned, unsigned, unsigned);
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unsigned int _bios_timeofday(unsigned, long *);
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#endif /* _biosh */
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