()
7
:
(Assembler)
: ..
107311 .
..
: ..
2012
: Assembler.
0x3D. DS:DX (DS , a DX ). AL . (AL=0). . CF=1, CF=0.
;.
= 0x3D
DS:DX = ,
0x0
AL. = :
AL = 0
AL = 1
AL = 2
:
CF = 0 ,
= ,
CF= 1 ,
= :
= 0x0002
= 0x0003
153 .
, :
:
=
=
:
CF = 0
CF = 1 ,
=
, , , .
. ( ), .
:
:
= 0X3F
=
DS:DX =
=
:
:
CF = 0
= , ( , EOF)
:
CF=1
=
. , , DS:DX. , : . ( , , ).
CF=1, .
, , DOS 0x09. , $, 0x09. , 0x09, , /, . 0x0001.
