Atlas - BIOS.H
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[FILE BEGIN]
1/***
2*bios.h - declarations for bios interface functions and supporting definitions
3*
4*   Copyright (c) 1987-1988, Microsoft Corporation.  All rights reserved.
5*
6*Purpose:
7*   This file declares the constants, structures, and functions
8*   used for accessing and using various BIOS interfaces.
9*
10*******************************************************************************/
11
12
13#ifndef NO_EXT_KEYS /* extensions enabled */
14    #define _CDECL  cdecl
15#else   /* extensions not enabled */
16    #define _CDECL
17#endif  /* NO_EXT_KEYS */
18
19/* manifest constants for BIOS serial communications (RS-232) support */
20
21/* serial port services */
22
23#define _COM_INIT       0   /* init serial port */
24#define _COM_SEND       1   /* send character */
25#define _COM_RECEIVE    2   /* receive character */
26#define _COM_STATUS     3   /* get serial port status */
27
28/* serial port initializers.  One and only one constant from each of the
29 * following four groups - character size, stop bit, parity, and baud rate -
30 * must be specified in the initialization byte.
31 */
32
33/* character size initializers */
34
35#define _COM_CHR7       2   /* 7 bits characters */
36#define _COM_CHR8       3   /* 8 bits characters */
37
38/* stop bit values - on or off */
39
40#define _COM_STOP1      0   /* 1 stop bit */
41#define _COM_STOP2      4   /* 2 stop bits */
42
43/*  parity initializers */
44
45#define _COM_NOPARITY   0   /* no parity */
46#define _COM_ODDPARITY  8   /* odd parity */
47#define _COM_EVENPARITY 24  /* even parity */
48
49/*  baud rate initializers */
50
51#define _COM_110        0       /* 110 baud */
52#define _COM_150        32      /* 150 baud */
53#define _COM_300        64      /* 300 baud */
54#define _COM_600        96      /* 600 baud */
55#define _COM_1200       128     /* 1200 baud */
56#define _COM_2400       160     /* 2400 baud */
57#define _COM_4800       192     /* 4800 baud */
58#define _COM_9600       224     /* 9600 baud */
59
60
61/* manifest constants for BIOS disk support */
62
63/* disk services */
64
65#define _DISK_RESET     0   /* reset disk controller */
66#define _DISK_STATUS    1   /* get disk status */
67#define _DISK_READ      2   /* read disk sectors */
68#define _DISK_WRITE     3   /* write disk sectors */
69#define _DISK_VERIFY    4   /* verify disk sectors */
70#define _DISK_FORMAT    5   /* format disk track */
71
72/* struct used to send/receive information to/from the BIOS disk services */
73
74#ifndef NO_EXT_KEYS     /* extensions must be enabled */
75
76#ifndef _DISKINFO_T_DEFINED
77
78struct diskinfo_t {
79    unsigned drive;
80    unsigned head;
81    unsigned track;
82    unsigned sector;
83    unsigned nsectors;
84    void far *buffer;
85    };
86
87#define _DISKINFO_T_DEFINED
88
89#endif
90
91#endif /* NO_EXT_KEYS */
92
93
94/* manifest constants for BIOS keyboard support */
95
96/* keyboard services */
97
98#define _KEYBRD_READ        0   /* read next character from keyboard */
99#define _KEYBRD_READY       1   /* check for keystroke */
100#define _KEYBRD_SHIFTSTATUS 2   /* get current shift key status */
101
102
103/* manifest constants for BIOS printer support */
104
105/* printer services */
106
107#define _PRINTER_WRITE  0   /* write character to printer */
108#define _PRINTER_INIT   1   /* intialize printer */
109#define _PRINTER_STATUS 2   /* get printer status */
110
111
112/* manifest constants for BIOS time of day support */
113
114/* time of day services */
115
116#define _TIME_GETCLOCK  0   /* get current clock count */
117#define _TIME_SETCLOCK  1   /* set current clock count */
118
119
120#ifndef _REGS_DEFINED
121
122/* word registers */
123
124struct WORDREGS {
125    unsigned int ax;
126    unsigned int bx;
127    unsigned int cx;
128    unsigned int dx;
129    unsigned int si;
130    unsigned int di;
131    unsigned int cflag;
132    };
133
134/* byte registers */
135
136struct BYTEREGS {
137    unsigned char al, ah;
138    unsigned char bl, bh;
139    unsigned char cl, ch;
140    unsigned char dl, dh;
141    };
142
143/* general purpose registers union -
144 *  overlays the corresponding word and byte registers.
145 */
146
147union REGS {
148    struct WORDREGS x;
149    struct BYTEREGS h;
150    };
151
152/* segment registers */
153
154struct SREGS {
155    unsigned int es;
156    unsigned int cs;
157    unsigned int ss;
158    unsigned int ds;
159    };
160
161#define _REGS_DEFINED
162
163#endif /* _REGS_DEFINED */
164
165
166/* function prototypes */
167
168unsigned _CDECL _bios_equiplist(void);
169unsigned _CDECL _bios_keybrd(unsigned);
170unsigned _CDECL _bios_memsize(void);
171unsigned _CDECL _bios_printer(unsigned, unsigned, unsigned);
172unsigned _CDECL _bios_serialcom(unsigned, unsigned, unsigned);
173unsigned _CDECL _bios_timeofday(unsigned, long *);
174int _CDECL int86(int, union REGS *, union REGS *);
175int _CDECL int86x(int, union REGS *, union REGS *, struct SREGS *);
176
177#ifndef NO_EXT_KEYS     /* extensions must be enabled */
178
179unsigned _CDECL _bios_disk(unsigned, struct diskinfo_t *);
180
181#endif /* NO_EXT_KEYS */
182
[FILE END]
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