outb(GLCD_DATA_PORT, 0xFF);
    cbi(GLCD_CTRL_PORT, GLCD_CTRL_RS);
    outb(GLCD_DATA_DDR, 0x00);
    sbi(GLCD_CTRL_PORT, GLCD_CTRL_RW);
    sbi(GLCD_CTRL_PORT, GLCD_CTRL_E);
    asm volatile ("nop"); asm volatile ("nop");
    while(inb(GLCD_DATA_PIN) & GLCD_STATUS_BUSY)
    {
        if(inb(GLCD_DATA_PIN) & GLCD_STATUS_BUSY)
            PORTB |= (1<<1);
        cbi(GLCD_CTRL_PORT, GLCD_CTRL_E);
        asm volatile ("nop"); asm volatile ("nop");
        asm volatile ("nop"); asm volatile ("nop");
        sbi(GLCD_CTRL_PORT, GLCD_CTRL_E);
        asm volatile ("nop"); asm volatile ("nop");
        asm volatile ("nop"); asm volatile ("nop");
    }
    cbi(GLCD_CTRL_PORT, GLCD_CTRL_E);
    cbi(GLCD_CTRL_PORT, GLCD_CTRL_RW);
    outb(GLCD_DATA_DDR, 0xFF);