Subversion Repositories shark

Rev

Go to most recent revision | Details | Last modification | View Log | RSS feed

Rev Author Line No. Line
44 pj 1
/* Project:     OSLib
2
 * Description: The OS Construction Kit
3
 * Date:                1.6.2000
4
 * Idea by:             Luca Abeni & Gerardo Lamastra
5
 *
6
 * OSLib is an SO project aimed at developing a common, easy-to-use
7
 * low-level infrastructure for developing OS kernels and Embedded
8
 * Applications; it partially derives from the HARTIK project but it
9
 * currently is independently developed.
10
 *
11
 * OSLib is distributed under GPL License, and some of its code has
12
 * been derived from the Linux kernel source; also some important
13
 * ideas come from studying the DJGPP go32 extender.
14
 *
15
 * We acknowledge the Linux Community, Free Software Foundation,
16
 * D.J. Delorie and all the other developers who believe in the
17
 * freedom of software and ideas.
18
 *
19
 * For legalese, check out the included GPL license.
20
 */
21
 
22
/*      Console output functions - part 2       */
23
 
24
#include <ll/i386/hw-data.h>
25
#include <ll/i386/hw-instr.h>
26
#include <ll/i386/cons.h>
27
/* #include <xsys.h>*/
28
#include <ll/i386/string.h>
29
#include <ll/i386/stdlib.h>
30
#include <ll/i386/stdio.h>
31
#include <ll/stdarg.h>
32
 
33
FILE(Cons2);
34
 
35
#define PAGE_SIZE               2048
36
#define PAGE_MAX                8
37
 
38
/* CGA compatible registers */
39
 
40
#define CGA_INDEX_REG   0x3D4
41
#define CGA_DATA_REG    0x3D5
42
 
43
#define VIDEO_ADDRESS_MSB       0x0C
44
#define VIDEO_ADDRESS_LSB       0x0D
45
 
46
 
47
extern int active_page;
48
extern int visual_page;
49
static int curs_x[PAGE_MAX];
50
static int curs_y[PAGE_MAX];
51
extern BYTE bios_x, bios_y, bios_attr;
52
 
53
/* MG */
54
int cons_columns; /* number of screen columns */
55
int cons_rows;    /* number of screen rows */
56
 
57
void set_visual_page(int page)
58
{
59
    unsigned short page_offset;
60
 
61
    page_offset = page * PAGE_SIZE;
62
    visual_page = page;
63
    outp(CGA_INDEX_REG, VIDEO_ADDRESS_LSB);
64
    outp(CGA_DATA_REG, page_offset & 0xFF);
65
    outp(CGA_INDEX_REG, VIDEO_ADDRESS_MSB);
66
    outp(CGA_DATA_REG, (page_offset >> 8) & 0xFF);
67
}
68
 
69
void set_active_page(int page)
70
{
71
    curs_x[active_page] = bios_x;
72
    curs_y[active_page] = bios_y;
73
    bios_x = curs_x[page];
74
    bios_y = curs_y[page];
75
    active_page = page;
76
}
77
 
78
int get_visual_page(void)
79
{
80
    return(visual_page);
81
}
82
 
83
int get_active_page(void)
84
{
85
    return(active_page);
86
}
87
 
88
void _clear(char c,char attr,int x1,int y1,int x2,int y2)
89
{
90
    register int i,j;
91
    WORD w = attr;
92
 
93
    w <<= 8; w |= c;
94
    for (i = x1; i <= x2; i++)
95
        for (j = y1; j <= y2; j++)
96
            lmempokew((LIN_ADDR)(0xB8000 + 2*i+cons_columns*2*j + 2*active_page*PAGE_SIZE),w);
97
    place(x1,y1);
98
    bios_y = y1;
99
    bios_x = x1;
100
}
101
 
102
void clear()
103
{
104
    _clear(' ',bios_attr,0,0,(cons_columns-1),(cons_rows-1));
105
}
106
 
107
void puts_xy(int x,int y,char attr,char *s)
108
{
109
    LIN_ADDR v = (LIN_ADDR)(0xB8000 + (cons_columns*y+x)*2 + active_page*(2*PAGE_SIZE));
110
    while (*s != 0) {
111
        /* REMEMBER! This is a macro! v++ is out to prevent side-effects */
112
        lmempokeb(v,*s); s++; v++;
113
        lmempokeb(v,attr); v++;
114
    }
115
}
116
 
117
void putc_xy(int x,int y,char attr,char c)
118
{
119
    LIN_ADDR v = (LIN_ADDR)(0xB8000 + (cons_columns*y+x)*2 + active_page*(2*PAGE_SIZE));
120
    /* REMEMBER! This is a macro! v++ is out to prevent side-effects */
121
    lmempokeb(v,c); v++;
122
    lmempokeb(v,attr);
123
}
124
 
125
char getc_xy(int x,int y,char *attr,char *c)
126
{
127
    LIN_ADDR v = (LIN_ADDR)(0xB8000 + (cons_columns*y+x)*2 + active_page*(2*PAGE_SIZE));
128
    char r;
129
    r = lmempeekb(v); v++;
130
    if (c != NULL) *c = r;
131
    r = lmempeekb(v);
132
    if (attr != NULL) *attr = r;
133
    return(r);
134
}