Subversion Repositories HelenOS

Rev

Rev 3975 | Rev 4177 | Go to most recent revision | Show entire file | Ignore whitespace | Details | Blame | Last modification | View Log | RSS feed

Rev 3975 Rev 3994
Line 58... Line 58...
58
static uint32_t ega_cursor;
58
static uint32_t ega_cursor;
59
static uint8_t *videoram;
59
static uint8_t *videoram;
60
static uint8_t *backbuf;
60
static uint8_t *backbuf;
61
static ioport8_t *ega_base;
61
static ioport8_t *ega_base;
62
 
62
 
-
 
63
#define EMPTY_CHAR  0x0720
-
 
64
 
63
chardev_t ega_console;
65
chardev_t ega_console;
64
 
66
 
65
/*
67
/*
66
 * This function takes care of scrolling.
68
 * This function takes care of scrolling.
67
 */
69
 */
68
static void ega_check_cursor(void)
70
static void ega_check_cursor(void)
69
{
71
{
70
    if (ega_cursor < EGA_SCREEN)
72
    if (ega_cursor < EGA_SCREEN)
71
        return;
73
        return;
72
 
74
   
73
    memmove((void *) videoram, (void *) (videoram + EGA_COLS * 2),
75
    memmove((void *) videoram, (void *) (videoram + EGA_COLS * 2),
74
        (EGA_SCREEN - EGA_COLS) * 2);
76
        (EGA_SCREEN - EGA_COLS) * 2);
75
    memmove((void *) backbuf, (void *) (backbuf + EGA_COLS * 2),
77
    memmove((void *) backbuf, (void *) (backbuf + EGA_COLS * 2),
76
        (EGA_SCREEN - EGA_COLS) * 2);
78
        (EGA_SCREEN - EGA_COLS) * 2);
77
    memsetw(videoram + (EGA_SCREEN - EGA_COLS) * 2, EGA_COLS, 0x0720);
79
    memsetw(videoram + (EGA_SCREEN - EGA_COLS) * 2, EGA_COLS, EMPTY_CHAR);
78
    memsetw(backbuf + (EGA_SCREEN - EGA_COLS) * 2, EGA_COLS, 0x0720);
80
    memsetw(backbuf + (EGA_SCREEN - EGA_COLS) * 2, EGA_COLS, EMPTY_CHAR);
79
    ega_cursor = ega_cursor - EGA_COLS;
81
    ega_cursor = ega_cursor - EGA_COLS;
80
}
82
}
81
 
83
 
82
static void ega_show_cursor(void)
84
static void ega_show_cursor(void)
83
{
85
{
Line 101... Line 103...
101
    uint8_t hi = pio_read_8(ega_base + EGA_DATA_REG);
103
    uint8_t hi = pio_read_8(ega_base + EGA_DATA_REG);
102
    pio_write_8(ega_base + EGA_INDEX_REG, 0x0f);
104
    pio_write_8(ega_base + EGA_INDEX_REG, 0x0f);
103
    uint8_t lo = pio_read_8(ega_base + EGA_DATA_REG);
105
    uint8_t lo = pio_read_8(ega_base + EGA_DATA_REG);
104
   
106
   
105
    ega_cursor = (hi << 8) | lo;
107
    ega_cursor = (hi << 8) | lo;
-
 
108
   
-
 
109
    if (ega_cursor >= EGA_SCREEN)
-
 
110
        ega_cursor = 0;
-
 
111
   
106
    if ((ega_cursor % EGA_COLS) != 0)
112
    if ((ega_cursor % EGA_COLS) != 0)
107
        ega_cursor = (ega_cursor + EGA_COLS) - ega_cursor % EGA_COLS;
113
        ega_cursor = (ega_cursor + EGA_COLS) - ega_cursor % EGA_COLS;
108
   
114
   
-
 
115
    memsetw(videoram + ega_cursor * 2, EGA_SCREEN - ega_cursor, EMPTY_CHAR);
-
 
116
    memsetw(backbuf + ega_cursor * 2, EGA_SCREEN - ega_cursor, EMPTY_CHAR);
-
 
117
   
109
    ega_check_cursor();
118
    ega_check_cursor();
110
    ega_move_cursor();
119
    ega_move_cursor();
111
    ega_show_cursor();
120
    ega_show_cursor();
112
}
121
}
113
 
122
 
Line 117... Line 126...
117
   
126
   
118
    if (!silent)
127
    if (!silent)
119
        videoram[ega_cursor * 2] = ch;
128
        videoram[ega_cursor * 2] = ch;
120
}
129
}
121
 
130
 
122
static void ega_putchar(chardev_t *d __attribute__((unused)), const char ch, bool silent)
131
static void ega_putchar(chardev_t *dev __attribute__((unused)), const char ch, bool silent)
123
{
132
{
124
    ipl_t ipl;
133
    ipl_t ipl;
125
   
134
   
126
    ipl = interrupts_disable();
135
    ipl = interrupts_disable();
127
    spinlock_lock(&egalock);
136
    spinlock_lock(&egalock);