diff -urN grub2.org/include/grub/ieee1275/ieee1275.h grub2/include/grub/ieee1275/ieee1275.h
--- grub2.org/include/grub/ieee1275/ieee1275.h	2007-10-03 17:52:35.006425889 +0200
+++ grub2/include/grub/ieee1275/ieee1275.h	2007-10-03 16:45:56.000000000 +0200
@@ -82,6 +82,12 @@
 
   /* CodeGen firmware does not correctly implement "output-device output" */
   GRUB_IEEE1275_FLAG_BROKEN_OUTPUT,
+
+  /* In non fb mode default number of console rows is 24, but in fact it's 25 */
+  GRUB_IEEE1275_FLAG_NOFB_ROWS25,
+
+  /* Old Pegaos firmware does not accept cls escape sequence use workaround */
+  GRUB_IEEE1275_FLAG_NOCLS,
 };
 
 extern int EXPORT_FUNC(grub_ieee1275_test_flag) (enum grub_ieee1275_flag flag);
diff -urN grub2.org/kern/powerpc/ieee1275/cmain.c grub2/kern/powerpc/ieee1275/cmain.c
--- grub2.org/kern/powerpc/ieee1275/cmain.c	2007-10-03 17:52:35.007425889 +0200
+++ grub2/kern/powerpc/ieee1275/cmain.c	2007-10-03 16:49:21.000000000 +0200
@@ -73,6 +73,7 @@
     {
       /* Broken in all versions */
       grub_ieee1275_set_flag (GRUB_IEEE1275_FLAG_BROKEN_OUTPUT);
+      grub_ieee1275_set_flag (GRUB_IEEE1275_FLAG_NOFB_ROWS25);
 
       /* There are two incompatible ways of checking the version number.  Try
          both. */
@@ -98,6 +99,14 @@
 	      grub_ieee1275_set_flag (GRUB_IEEE1275_FLAG_NO_PARTITION_0);
 	      grub_ieee1275_set_flag (GRUB_IEEE1275_FLAG_0_BASED_PARTITIONS);
 	    }
+	  /* It seems old firmware for Pegaos 1 do not accept cls escape then
+	     we need to emulate it using \n sequence */
+	  if (!grub_strcmp (tmp, "0.")
+	      || !grub_strcmp (tmp, "1.0")
+	      || !grub_strcmp (tmp, "1.1"))
+	    {
+	      grub_ieee1275_set_flag (GRUB_IEEE1275_FLAG_NOCLS);
+	    }
 	}
     }
 }
diff -urN grub2.org/term/ieee1275/ofconsole.c grub2/term/ieee1275/ofconsole.c
--- grub2.org/term/ieee1275/ofconsole.c	2007-10-03 17:52:35.009425889 +0200
+++ grub2/term/ieee1275/ofconsole.c	2007-10-03 17:40:31.000000000 +0200
@@ -29,6 +29,7 @@
 
 static grub_uint8_t grub_ofconsole_width;
 static grub_uint8_t grub_ofconsole_height;
+static grub_uint8_t grub_ofconsole_fb;
 
 static int grub_curr_x;
 static int grub_curr_y;
@@ -70,20 +71,40 @@
 static void
 grub_ofconsole_putchar (grub_uint32_t c)
 {
-  char chr = c;
-  
-  if (c == '\n')
-    {
+  char chr;
+
+  switch(c)
+  {
+    case '\a':
+      break;            
+    case '\n':
+      grub_putcode ('\r');
       grub_curr_y++;
+      if(grub_curr_y > (grub_ofconsole_height - 1))
+        /* Is this realy correct for all OF versions around ? */
+        grub_curr_y = grub_ofconsole_fb ?
+          grub_curr_y - 4 : grub_ofconsole_height - 1; 
+      break;
+    case '\r':
       grub_curr_x = 0;
-    }
-  else
-    {
+      break;
+    case '\b':
+      if(grub_curr_x > 0)
+        grub_curr_x--;
+      break;
+
+    default:
+      if(c == '\t')
+        c = ' ';
+
+      if (grub_curr_x >= (grub_ofconsole_width - 1))
+        grub_putcode ('\n');
+
       grub_curr_x++;
-      if (grub_curr_x > grub_ofconsole_width)
-	grub_putcode ('\n');
-    }
+      break;
+  }                                                                                                                                                                        
 
+  chr = c;
   grub_ieee1275_write (stdout_ihandle, &chr, 1, 0);
 }
 
@@ -228,7 +249,7 @@
 static grub_uint16_t
 grub_ofconsole_getxy (void)
 {
-  return ((grub_curr_x - 1) << 8) | grub_curr_y;
+  return (grub_curr_x << 8) | grub_curr_y;
 }
 
 static grub_uint16_t
@@ -270,6 +291,21 @@
 	      grub_free (val);
 	    }
 	}
+      if (! grub_ieee1275_get_property_length (options, "fb-mode",
+					       &lval) && lval != -1)
+	{
+	  val = grub_malloc (lval);
+	  if (val)
+	    {
+	      if (! grub_ieee1275_get_property (options, "fb-mode",
+						val, lval, 0))
+                {
+                  if (grub_strncmp (val, "0x0x0", 5) != 0)
+		    grub_ofconsole_fb = 1;
+                }
+	      grub_free (val);
+	    }
+	}
     }
 
   /* Use a small console by default.  */
@@ -278,6 +314,9 @@
   if (! grub_ofconsole_height)
     grub_ofconsole_height = 24;
 
+  if ( grub_ofconsole_fb == 0 && grub_ofconsole_height == 24 && grub_ieee1275_test_flag (GRUB_IEEE1275_FLAG_NOFB_ROWS25))
+    grub_ofconsole_height = 25;
+
   return (grub_ofconsole_width << 8) | grub_ofconsole_height;
 }
 
@@ -295,10 +334,20 @@
 static void
 grub_ofconsole_cls (void)
 {
-  /* Clear the screen.  Using serial console, screen(1) only recognizes the
-   * ANSI escape sequence.  Using video console, Apple Open Firmware (version
-   * 3.1.1) only recognizes the literal ^L.  So use both.  */
-  grub_ofconsole_writeesc ("\e[2J");
+  if (! grub_ieee1275_test_flag (GRUB_IEEE1275_FLAG_NOCLS))
+    {
+      /* Clear the screen.  Using serial console, screen(1) only recognizes the
+       * ANSI escape sequence.  Using video console, Apple Open Firmware (version
+       * 3.1.1) only recognizes the literal ^L.  So use both.  */
+      grub_ofconsole_writeesc ("\e[2J");
+    }
+  else
+    {
+      /* It seems no cls escape is available then simulate it using \n flood */
+      int x = (grub_ofconsole_height * 2) - grub_curr_y;
+      while(x--)
+        grub_putcode ('\n');
+    }
   grub_gotoxy (0, 0);
 }