1.1 --- a/src/vid.c	Thu Jun 09 02:45:49 2011 +0300
     1.2 +++ b/src/vid.c	Thu Jun 09 05:09:49 2011 +0300
     1.3 @@ -1,5 +1,6 @@
     1.4  #include <string.h>
     1.5  #include "vid.h"
     1.6 +#include "intr.h"
     1.7  #include "asmops.h"
     1.8  
     1.9  /* height of our virtual console text buffer */
    1.10 @@ -27,10 +28,15 @@
    1.11  
    1.12  void clear_scr(void)
    1.13  {
    1.14 +	int istate = get_intr_state();
    1.15 +	disable_intr();
    1.16 +
    1.17  	memset16(vmem, VMEM_CHAR(' ', LTGRAY, BLACK), WIDTH * HEIGHT);
    1.18  	start_line = 0;
    1.19  	set_start_line(0);
    1.20  	set_cursor(0, 0);
    1.21 +
    1.22 +	set_intr_state(istate);
    1.23  }
    1.24  
    1.25  void set_char(char c, int x, int y, int fg, int bg)
    1.26 @@ -41,6 +47,8 @@
    1.27  void set_cursor(int x, int y)
    1.28  {
    1.29  	int loc;
    1.30 +	int istate = get_intr_state();
    1.31 +	disable_intr();
    1.32  
    1.33  	if(x < 0 || x >= WIDTH || y < 0 || y >= HEIGHT) {
    1.34  		loc = 0xffff;
    1.35 @@ -52,10 +60,15 @@
    1.36  	outb(loc, CRTC_DATA);
    1.37  	outb(CRTC_CURSOR_HIGH, CRTC_ADDR);
    1.38  	outb(loc >> 8, CRTC_DATA);
    1.39 +
    1.40 +	set_intr_state(istate);
    1.41  }
    1.42  
    1.43  void scroll_scr(void)
    1.44  {
    1.45 +	int new_line, istate = get_intr_state();
    1.46 +	disable_intr();
    1.47 +
    1.48  	if(++start_line > VIRT_HEIGHT - HEIGHT) {
    1.49  		/* The bottom of the visible range reached the end of our text buffer.
    1.50  		 * Copy the rest of the lines to the top and reset start_line.
    1.51 @@ -65,10 +78,11 @@
    1.52  	}
    1.53  
    1.54  	/* clear the next line that will be revealed by scrolling */
    1.55 -	int new_line = start_line + HEIGHT - 1;
    1.56 +	new_line = start_line + HEIGHT - 1;
    1.57  	memset16(vmem + new_line * WIDTH, VMEM_CHAR(' ', LTGRAY, BLACK), WIDTH);
    1.58 +	set_start_line(start_line);
    1.59  
    1.60 -	set_start_line(start_line);
    1.61 +	set_intr_state(istate);
    1.62  }
    1.63  
    1.64  static void set_start_line(int line)