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/*
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/*
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 * The EGA driver.
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 * The EGA driver.
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 * Simple and short. Function for displaying characters and "scrolling".
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 * Simple and short. Function for displaying characters and "scrolling".
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 */
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 */
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static parea_t ega_parea;   /**< Physical memory area for EGA video RAM. */
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SPINLOCK_INITIALIZE(egalock);
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SPINLOCK_INITIALIZE(egalock);
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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 ioport_t ega_base;
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static ioport_t ega_base;
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    ega_cursor = ega_cursor - ROW;
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    ega_cursor = ega_cursor - ROW;
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}
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}
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static void ega_move_cursor(void)
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static void ega_move_cursor(void)
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{
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{
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    outb(ega_base + EGA_INDEX_REG, 0xe);
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    pio_write_8(ega_base + EGA_INDEX_REG, 0xe);
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    outb(ega_base + EGA_DATA_REG, (uint8_t) ((ega_cursor >> 8) & 0xff));
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    pio_write_8(ega_base + EGA_DATA_REG, (uint8_t) ((ega_cursor >> 8) & 0xff));
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    outb(ega_base + EGA_INDEX_REG, 0xf);
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    pio_write_8(ega_base + EGA_INDEX_REG, 0xf);
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    outb(ega_base + EGA_DATA_REG, (uint8_t) (ega_cursor & 0xff));  
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    pio_write_8(ega_base + EGA_DATA_REG, (uint8_t) (ega_cursor & 0xff));   
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}
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}
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static void ega_display_char(char ch, bool silent)
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static void ega_display_char(char ch, bool silent)
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{
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{
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    backbuf[ega_cursor * 2] = ch;
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    backbuf[ega_cursor * 2] = ch;
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    ega_move_cursor();
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    ega_move_cursor();
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    chardev_initialize("ega_out", &ega_console, &ega_ops);
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    chardev_initialize("ega_out", &ega_console, &ega_ops);
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    stdout = &ega_console;
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    stdout = &ega_console;
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    ega_parea.pbase = videoram_phys;
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    ega_parea.vbase = (uintptr_t) videoram;
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    ega_parea.frames = 1;
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    ega_parea.cacheable = false;
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    ddi_parea_register(&ega_parea);
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    sysinfo_set_item_val("fb", NULL, true);
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    sysinfo_set_item_val("fb", NULL, true);
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    sysinfo_set_item_val("fb.kind", NULL, 2);
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    sysinfo_set_item_val("fb.kind", NULL, 2);
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    sysinfo_set_item_val("fb.width", NULL, ROW);
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    sysinfo_set_item_val("fb.width", NULL, ROW);
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    sysinfo_set_item_val("fb.height", NULL, ROWS);
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    sysinfo_set_item_val("fb.height", NULL, ROWS);
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    sysinfo_set_item_val("fb.blinking", NULL, true);
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    sysinfo_set_item_val("fb.blinking", NULL, true);