arch/x86/console.cpp

   1 /* Quarn OS
   2  *
   3  * Text console
   4  *
   5  * Copyright (C) 2008 Pawel Dziepak
   6  *
   7  * Functions that are needed to fully use text console which is "created" by
   8  * keyboard and screen.
   9  */
  10
  11
  12 #include "arch_asm.h"
  13 #include "console.h"
  14
  15 using namespace arch;
  16
  17 /* Show a sign of selected colour in certain place */
  18 void arch::screen_print(const char sign, scr_color color, int x, int y) {
  19         char *text_mem = (char*)0xB8000;
  20         int pos = x + y * scr_width;
  21
  22         /* Put char into graphic card memory */
  23         text_mem[pos * 2] = sign;
  24         text_mem[pos * 2 + 1] = color;
  25
  26         /* Move a cursor */
  27         pos++;
  28         outb(0x3D4, 14);
  29         outb(0x3D5, pos >> 8);
  30         outb(0x3D4, 15);
  31         outb(0x3D5, pos);
  32 }