MB90610A Series
(Continued)
Symbol
Meaning
rel
Branch specification relative to PC
ear
eam
Effective addressing (codes 00 to 07)
Effective addressing (codes 08 to 1F)
rlst
Register list
Table 3 Effective Address Fields
Address format
Number of bytes in address
extension *
Code
Notation
00
01
02
03
04
05
06
07
R0
RW0
RW1
RW2
RW3
RW4
RW5
RW6
RW7
RL0 Register direct
(RL0)
RL1 “ea” corresponds to byte, word, and
(RL1) long-word types, starting from the
RL2 left
(RL2)
RL3
R1
R2
R3
R4
R5
R6
R7
—
(RL3)
08
09
0A
0B
@RW0
Register indirect
@RW1
@RW2
@RW3
0
0
0C
0D
0E
0F
@RW0 +
@RW1 +
@RW2 +
@RW3 +
Register indirect with post-increment
10
11
12
13
14
15
16
17
@RW0 + disp8
@RW1 + disp8
@RW2 + disp8
@RW3 + disp8
@RW4 + disp8
@RW5 + disp8
@RW6 + disp8
@RW7 + disp8
Register indirect with 8-bit
displacement
1
2
18
19
1A
1B
@RW0 + disp16
@RW1 + disp16
@RW2 + disp16
@RW3 + disp16
Register indirect with 16-bit
displacement
1C
1D
1E
1F
@RW0 + RW7
@RW1 + RW7
@PC + disp16
addr16
Register indirect with index
Register indirect with index
PC indirect with 16-bit displacement
Direct address
0
0
2
2
Note: The number of bytes in the address extension is indicated by the “+” symbol in the “#” (number of bytes)
column in the tables of instructions.
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