IA186ES/IA188ES
Data Sheet
8-Bit/16-Bit Microcontrollers
November 15, 2011
7.1
Key to Abbreviations Used in Instruction Set Summary Table
Abbreviations used in the Instruction Set Summary Table are explained below.
7.1.1 Operand Address Byte
The operand address byte is configured as shown below.
7
6
5
4
3
2
1
0
mod field aux field r/m field
7.1.2 Modifier Field
The modifier field is defined below.
mod Description
11
00
01
10
r/m is treated as a register field
DISP = 0, disp-low and disp-high are absent, address displacement is 0
DISP = disp-low sign-extended to 16-bits, disp-high is absent
DISP = disp-high:disp-low
7.1.3 Auxiliary Field
The Auxiliary Field is defined below.
aux If mod = 11 and word = 0 If mod = 11 and word = 1
000 AL
001 CL
010 DL
011 BL
100 AH
101 CH
110 DH
111 BH
AX
CX
DX
BX
SP
BP
SI
DI
Note: When mod 11, depends on instruction.
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IA211050902-19
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