Motorola MC68030 User Manual

Data Organization and Addressing Capabilities
2-34 MC68030 USER’S MANUAL MOTOROLA
Address register pointer automatically incremented after use.
– (An)
Address register pointer automatically decremented before use.
Absolute Address:
(addr)
Absolute address in data space.
(psaddr,ZPC)
Absolute address in program space. Symbol ZPC suppresses the PC,
but retains PC relative mode to directly access the program space.
Register Pointer:
(Rn)
Register as a pointer.
(disp,Rn)
Register as a pointer with constant index (or base address).
Indexing
(An,Rn)
Register pointer An with variable index Rn.
(disp,An,Rn)
Register pointer with constant and variable index (or a base address
with a variable index).
(addr,Rn)
Absolute address with two variable indexes.
Subscripting:
(An,Rn*scale)
Address register pointer subscript.
(disp,An,Rn*scale)
Address register pointer subscript with constant displacement
(or base address with subscript).
(addr,Rn*scale)
Absolute address with subscript.
(addr,An,Rn*scale)
Absolute address subscript with variable index.
Program Relative:

Motorola MC68030 Specifications

General

Brand	Motorola
Model	MC68030
Category	Computer Hardware
Language	English