OPN DB 19
L P#0.0
LAR1
L #Num
T #num1
_001: NOP 0
L #num1
L 1
>=I
JNB _002
A DBX [AR1,P#0.0]
= DBX [AR1,P#20.0]
+AR1
L #num1
L 1
-I
T #num1
JU _001
_002: NOP 0
OPN DB 19
L P#0.0
LAR1
L #Num
T #num1
_011: NOP 0
L #num1
L 1
>=I
JNB _015
A #bQj
JNB _013
A DBX [AR1,P#20.0]
= DBX [AR1,P#0.1]
JU _014
_013: NOP 0
A #bHt
JNB _014
A DBX [AR1,P#20.1]
= DBX [AR1,P#0.0]
_014: NOP 0
+AR1
L #num1
L 1
-I
T #num1
JU _011
_015: NOP 0
OPN DB 19
A #bHt
JNB _065
L P#0.0
LAR1
L #Num
L 1
-I
T #num1
_061: NOP 0
L #num1
L 1
>=I
JNB _062
+AR1
L #num1
L 1
-I
T #num1
JU _061
_062: NOP 0
A DB19.DBX 18.7
= DBX [AR1,P#0.0]
_065: NOP 0
兄弟们这几段程序怎样理解