Removed very broken and bad code that could've corrupted memory in other segments, updated hello.asm accordingly

hello.asm

@@ -1,13 +1,14 @@
 mov ax, 3000h
 mov ds, ax
 
-push hello_world_str
+mov si, hello_world_str
 mov ah, 01h
 int 22h
 
 retf
 
 hello_world_str db "Hello, World!", 13, 10, 13, 10, 0
+new_line db 13, 10, 0
 
 buffer:
   times 32 db 0

kernel.asm

@@ -364,25 +364,15 @@ _decode_buffer:
   times 11 db 0
 
 ihdlr:
-  pop word [_ihdlr_stack0]
-  pop word [_ihdlr_stack1]
-  pop word [_ihdlr_stack2]
-
   cmp ah, 01h
   jne _ihdlr_2
+  push si
   call print
 _ihdlr_2:
   cmp ah, 02h
   jne _ihdlr_3
+  push si
+  push di
   call readline
 _ihdlr_3:
-  
-
-  push word [_ihdlr_stack2]
-  push word [_ihdlr_stack1]
-  push word [_ihdlr_stack0]
-  iret
-
-_ihdlr_stack0 dw 0
-_ihdlr_stack1 dw 0
-_ihdlr_stack2 dw 0
+  iret