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80386
Encoding
of
16·bit
Address
Mode
with
"mod
rIm"
Byte
mod
rIm
Effective
Address
mod
rIm
Effective
Address
00000
OS:[BX+Sil
10000
OS:[BX+SI
+d16)
00001
OS:[BX+Oil
10001 OS:[BX +
01
+ d16)
00010
SS:[BP+Sil
10010
SS:[BP+SI+d16)
00011
SS:[BP+Oil
10011 SS:[BP+
01
+ d16)
00100
OS:[Sil
10100
OS:
[SI
+ d16)
00101 OS:[Oil
10101
OS:
[01
+ d16)
00110
OS:d16
10110
SS:
[BP + d16)
00111
OS:[BX) 10
111
OS:[BX+d16)
,.
01000
OS:
[BX +
SI
+
dB)
11000
register-see
below
01
001
OS:
[BX +
01
+
dB)
11
001
register-see
below
01
010
SS:[BP+SI+dB)
11
010
register-see
below
01011
SS:
[BP +
01
+
dB)
11
011
register-see
below
01100
OS:[SI+dB)
11
100
register-see
below
01
101
OS:[OI
+
dB)
11
101
register-see
below
01
110
SS:[BP+dB)
11
110
register-see
below
01
111
OS:[BX+dB)
11
111
register-see
below
Register Specified
by
rIm
During 16·Bit Data Operations
mod
rIm
Function
of
w Field
(when
w=O)
(when w =
1)
11000
AL
AX
11
001
CL
CX
11
010
OL
OX
11
011
BL
BX
11
100
AH
SP
11
101
CH
BP
11
110
OH
SI
11
111
BH
01
Register Specified
by
rIm
During 32·Bit Data Operations
mod
rIm
Function
of
w Field
(when
w=O)
(when w =
1)
11000
AL
EAX
11
001
CL
ECX
11010
OL
EOX
11
011
BL
EBX
11
100
AH
ESP
11
101
CH
EBP
11
110
OH
ESI
11
111
BH
EOI
12B