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Bit ≤ (0 Modulo (Offset)<31, Offset of 0 = MSB)
31
30
29
MSB
Byte
31
High-Order Byte
16-Bit Word
31
High-Order Word
Long Word
31
Quad Word
63
62
MSB
31
Offset
Bit Field (0 ≤ Offset<32, 0<Width ≤ 32)
31
Note: If width + offset < 32, bit filed wraps around within the register.
Unpacked BCD (a = MSB)
31
Packed BCD (a = MSB First Digit, e = MSB Second Digit)
31
MOTOROLA
24
23
Middle-High Byte
MSB
Data Organization in Data Registers
MC68030 USER'S MANUAL
Data Organization and Addressing Capabilities
• • •
16
15
Middle-Low Byte
16
15
Long Word
Any Dx
• • •
LSB
Long Word
8
7
6
5
x
x
x
8
7
6
5
a
b
c
1
8
7
Low-Order Byte
Low-Order Word
4
3
2
1
x
a
b
c
4
3
2
1
d
e
f
g
0
LSB
0
0
0
32
0
0
0
d
0
h
2-3
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