Special Addressing – Absolute Short Address - Motorola DSP56000 Manual

24-bit digital signal processor
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EXAMPLE A: MOVE P: $3200,X0
BEFORE EXECUTION
X1
47
0 0 0
0 0 1 X X X X X X
23
$3204
$3200 $ A 5 B 4 C 6
EXAMPLE B: MOVE A1, X: $3
BEFORE EXECUTION
A2
A1
55
48 47
X
X
3 4 F 5 E 6
7
0 23
$0040
$003F
$0003
$0000
Assembler Syntax: aa
Memory Spaces: P:, X:, Y:, L:
Additional Instruction Execution Time (Clocks): 0
Additional Effective Address Words: 0
Figure 6-11 Special Addressing – Absolute Short Address
6 - 20
INSTRUCTION GROUPS
X0
24 23
0
0 23
0
P MEMORY
23
0
X X X X X X
A0
24 23
0
X X X X X X
0 23
0
X MEMORY
23
0
X X X X X X
INSTRUCTION SET INTRODUCTION
AFTER EXECUTION
X1
47
0 0 0
0 0 1 A 5 B 4 C 6
23
$3204
$3200 $ A 5 B 4 C 6
AFTER EXECUTION
A2
A1
55
48 47
X
X
3 4 F 5 E 6
7
0 23
$0040
$003F
ABSOLUTE
SHORT
ADDRESSIN-
$0003
GRANGE
$0000
X0
24 23
0
0 23
0
P MEMORY
23
0
X X X X X X
A0
24 23
0
X X X X X X
0 23
0
X MEMORY
23
0
3 4 F 5 E 6
MOTOROLA

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