ia186em Innovasic Semiconductor Inc., ia186em Datasheet - Page 137

• Manufacturer Part Number: ia186em
• Description: 8-bit/16-bit Microcontrollers
• Manufacturer: Innovasic Semiconductor Inc.

IA186EM/IA188EM
8-Bit/16-Bit Microcontrollers
7.1.3
The Auxiliary Field is defined below.
Note: When mod
7.1.4
The r/m field is defined below.
7.1.5
The displacement is an 8- or 16-bit value added to the offset portion of the address.
7.1.6
The immediate bytes consist of up to 16 bits of immediate data.
7.1.7
The segment override prefix is configured as shown below.
aux
000
001
010
011
100
101
110
111
r/m
000
001
010
011
100
101
110
111
7
0
6
0
If mod = 11 and word = 0
AL
CL
DL
BL
AH
CH
DH
BH
Description
EA = (BX) + (SI) + DISP [where EA is the Effective Address]
EA = (BX) + (DI) + DISP
EA = (BP) + (SI) + DISP
EA = (BX) + (DI) + DISP
EA = (SI) + DISP
EA = (DI) + DISP
EA = (BP) + DISP [except if mod = 00, then EA = disp-high:disp-low]
EA = (BX) + DISP
5
1
Auxiliary Field
r/m Field
Displacement
Immediate Bytes
Segment Override Prefix
4
SR
3
SR
11, depends on instruction.
®
2
1
1
1
0
0
If mod = 11 and word = 1
AX
CX
DX
BX
SP
BP
SI
DI
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Page 137 of 145
IA211050831-16
December 24, 2008
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