Linear Addressing - Fujitsu MB90335 Series Hardware Manual

CHAPTER 2 CPU

2.3 Linear Addressing

2.3 Linear Addressing
There are two types of linear addressing:
• 24-bit operand specification: Directly specifies a 24-bit address using operands.
• 32-bit register indirect specification: Uses the lower 24-bit of a 32-bit general-purpose
■ 24-bit Operand Specification
Figure 2.3-1 and Figure 2.3-2 show examples of 24-bit operand specification and 32-bit register indirect
specification, respectively.
Figure 2.3-1 Example of Linear Method (24-bit Operand Specification)
JMPP 123456H
Old program counter
program bank
New program counter
program bank
Figure 2.3-2 Example of Linear Method (32-bit Register Indirect Specification)
MOV A,@RL1+7
Old
New
24
register contents as the address.
17 452D
12
3456
XXXX
AL
003A
AL
FUJITSU MICROELECTRONICS LIMITED
17452D
H
123456
H
090700
H
7
RL1
(The upper 8-bit are ignored)
MB90335 Series
JMPP 123456H
Next instruction
3A
H
240906F9
H
CM44-10137-6E