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Rev 4344 Rev 4345
Line 58... Line 58...
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static uint32_t ega_cursor;
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static uint32_t ega_cursor;
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static uint8_t *videoram;
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static uint8_t *videoram;
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static uint8_t *backbuf;
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static uint8_t *backbuf;
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static ioport8_t *ega_base;
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static ioport8_t *ega_base;
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#define EMPTY_CHAR  0x0720
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chardev_t ega_console;
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chardev_t ega_console;
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/*
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/*
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 * This function takes care of scrolling.
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 * This function takes care of scrolling.
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 */
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 */
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static void ega_check_cursor(void)
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static void ega_check_cursor(void)
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{
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{
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    if (ega_cursor < EGA_SCREEN)
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    if (ega_cursor < EGA_SCREEN)
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        return;
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        return;
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    memmove((void *) videoram, (void *) (videoram + EGA_COLS * 2),
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    memmove((void *) videoram, (void *) (videoram + EGA_COLS * 2),
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        (EGA_SCREEN - EGA_COLS) * 2);
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        (EGA_SCREEN - EGA_COLS) * 2);
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    memmove((void *) backbuf, (void *) (backbuf + EGA_COLS * 2),
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    memmove((void *) backbuf, (void *) (backbuf + EGA_COLS * 2),
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        (EGA_SCREEN - EGA_COLS) * 2);
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        (EGA_SCREEN - EGA_COLS) * 2);
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    memsetw(videoram + (EGA_SCREEN - EGA_COLS) * 2, EGA_COLS, 0x0720);
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    memsetw(videoram + (EGA_SCREEN - EGA_COLS) * 2, EGA_COLS, EMPTY_CHAR);
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    memsetw(backbuf + (EGA_SCREEN - EGA_COLS) * 2, EGA_COLS, 0x0720);
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    memsetw(backbuf + (EGA_SCREEN - EGA_COLS) * 2, EGA_COLS, EMPTY_CHAR);
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    ega_cursor = ega_cursor - EGA_COLS;
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    ega_cursor = ega_cursor - EGA_COLS;
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}
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}
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static void ega_show_cursor(void)
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static void ega_show_cursor(void)
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{
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{
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    uint8_t hi = pio_read_8(ega_base + EGA_DATA_REG);
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    uint8_t hi = pio_read_8(ega_base + EGA_DATA_REG);
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    pio_write_8(ega_base + EGA_INDEX_REG, 0x0f);
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    pio_write_8(ega_base + EGA_INDEX_REG, 0x0f);
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    uint8_t lo = pio_read_8(ega_base + EGA_DATA_REG);
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    uint8_t lo = pio_read_8(ega_base + EGA_DATA_REG);
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    ega_cursor = (hi << 8) | lo;
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    ega_cursor = (hi << 8) | lo;
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    if (ega_cursor >= EGA_SCREEN)
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        ega_cursor = 0;
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    if ((ega_cursor % EGA_COLS) != 0)
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    if ((ega_cursor % EGA_COLS) != 0)
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        ega_cursor = (ega_cursor + EGA_COLS) - ega_cursor % EGA_COLS;
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        ega_cursor = (ega_cursor + EGA_COLS) - ega_cursor % EGA_COLS;
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    memsetw(videoram + ega_cursor * 2, EGA_SCREEN - ega_cursor, EMPTY_CHAR);
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    memsetw(backbuf + ega_cursor * 2, EGA_SCREEN - ega_cursor, EMPTY_CHAR);
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    ega_check_cursor();
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    ega_check_cursor();
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    ega_move_cursor();
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    ega_move_cursor();
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    ega_show_cursor();
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    ega_show_cursor();
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}
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}
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    if (!silent)
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    if (!silent)
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        videoram[ega_cursor * 2] = ch;
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        videoram[ega_cursor * 2] = ch;
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}
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}
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static void ega_putchar(chardev_t *d __attribute__((unused)), const char ch, bool silent)
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static void ega_putchar(chardev_t *dev __attribute__((unused)), const char ch, bool silent)
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{
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{
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    ipl_t ipl;
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    ipl_t ipl;
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    ipl = interrupts_disable();
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    ipl = interrupts_disable();
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    spinlock_lock(&egalock);
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    spinlock_lock(&egalock);