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PEA
Push Effective Address
PEA
Operation:
Sp - 4
=> SP; (ea) => (SP)
Assembler
Syntax:
Attributes:
PEA (ea)
Size
=
(Long)
Description:
Computes the effective address and pushes it onto the stack. The effective address
must be a long word address.
Condition Codes:
Not affected.
Instruction Format:
15
14
13
12
11
10
9
8
7
6
5
4
3
2
o
EFFECTIVE ADDRESS
0
1
0
0
1
0
0
0
0
1
I
MODE
REGISTER
Instruction Fields:
Effective Address field -
Specifies the address to be pushed onto the stack. Only control
addressing modes are allowed as shown:
Addressing Mode
Mode
On
-
An
-
(An)
010
(An) +
-
-(An)
-
(d16, An)
101
(dS, An, Xn)
110
(bd, An, Xn)
110
CPU32 REFERENCE MANUAL
Register
Addressing Mode
-
(xxx).W
-
(xxx).L
Reg. number: An
#(data)
-
-
Reg. number: An
(d16, PC)
Reg. number: An
(ds, PC, Xn)
Reg. number: An
(bd, PC, Xn)
INSTRUCTION SET
Mode
111
111
-
111
111
111
Register
000
001
-
010
011
011
MOTOROLA
4-133
III
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