From b75c10c9d8c7405ba2f89724b485154d5201c404 Mon Sep 17 00:00:00 2001
From: Michal Idziorek <m.i@gmx.at>
Date: Fri, 5 Sep 2014 02:36:33 +0200
Subject: working on bootloaders (lba)

---
 boot/print_string_16.asm | 46 +++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 43 insertions(+), 3 deletions(-)

(limited to 'boot/print_string_16.asm')

diff --git a/boot/print_string_16.asm b/boot/print_string_16.asm
index 92b4ea0..b758725 100644
--- a/boot/print_string_16.asm
+++ b/boot/print_string_16.asm
@@ -1,5 +1,11 @@
 [bits 16]
 
+BLANK:
+    db 0x12
+
+SPACE:
+    db " ",0
+
 ;print_string routine ([bx])
 ;this routine will print a null terminated string at [bx] to the screen.
 print_string:
@@ -27,19 +33,53 @@ print_string:
     popa			;pop all registers
     ret				;return to caller
 
+print_clear:
+
+pusha
+    mov ah,0x6	    ;func
+    mov al,0	    ;scroll one line
+    mov bh,[BLANK]  ;blank char
+
+    mov ch,0	    ;upper left corner
+    mov cl,0
+    mov dh,20	    ;lower right corner
+    mov dl,40
+    int 0x10
+
+    mov ah,0x2
+    mov bh,0
+    mov dl,0
+    mov dh,15
+    int 0x10
+popa
+
 print_nextline:
 
     pusha
 
+    mov ah,0x6	    ;func
+    mov al,1	    ;scroll one line
+    mov bh,[BLANK]  ;blank char
+
+    mov ch,0	    ;upper left corner
+    mov cl,0
+    mov dh,20	    ;lower right corner
+    mov dl,40
+    int 0x10
+
+
     mov ah,0x3
-    mov bh,0	
+    mov bh,0
     int 0x10
 
+
     mov ah,0x2
-    mov bh,0	
-    inc dh
     mov dl,0
     int 0x10
+
+    mov bx,SPACE
+    call print_string
+
     popa
     ret
 
-- 
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