Motorola MC68030 User Manual

Data Organization and Addressing Capabilities
MOTOROLA MC68030 USER’S MANUAL 2-3
Note: If width + offset < 32, bit filed wraps around within the register.
Data Organization in Data Registers
Bit ≤ (0 Modulo (Offset)<31, Offset of 0 = MSB)
31 30 29 10
MSB ••• LSB
Byte
31 24 23 16 15 8 7 0
High-Order Byte Middle-High Byte Middle-Low Byte Low-Order Byte
16-Bit Word
31 16 15 0
High-Order Word Low-Order Word
Long Word
31 0
Long Word
Quad Word
63 62 32
MSB Any Dx
31 0
Offset MSB ••• LSB
Bit Field (0 ≤ Offset<32, 0<Width ≤ 32)
31 0
Long Word
Unpacked BCD (a = MSB)
31 876543210
xxxxabcd
Packed BCD (a = MSB First Digit, e = MSB Second Digit)
31 876543210
abcdefgh

Motorola MC68030 Specifications

General

Brand	Motorola
Model	MC68030
Category	Computer Hardware
Language	English