IA186EM-PQF100I-R INNOVASIC [InnovASIC, Inc], IA186EM-PQF100I-R Datasheet - Page 86

• Manufacturer Part Number: IA186EM-PQF100I-R
• Description: 8/16-Bit Microcontrollers
• Manufacturer: INNOVASIC [InnovASIC, Inc]

IA186EM/IA188EM
8/16-BIT Microcontrollers
mod field (Modifier Field)
mod
11
00
01
10
aux field (Auxiliary Field)
aux
000
001
010
011
100
101
110
111
When mod $ 11, depends on instruction
r/m field
r/m
000
001
010
011
100
101
110
111
Displacement
The displacement is an 8 or 16 bit value added to the offset portion of the address.
Immediate
The immediate bytes consist of up to 16 bits of immediate data.
Description
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.
If mod = 11 and word = 0
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
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AL
CL
DL
BL
AH
CH
DH
BH
If mod = 11 and word = 1
AX
CX
DX
BX
SP
BP
SI
DI
As of Production Version -03
Data Sheet