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CHAPTER2 Dependence Functions
2.1.2 Memory Simulation

This section describes the memory simulation executed.

■Memory Simulation

The simulator debugger must first secure memory space to simulate instructions because it simulates the
memory space secured in the host PC memory.
• To secure the memory area, either use the [Setup] - [Memory Map] menu, or the SET MAP command in
the Command window.
• Load the file output by the Linkage Editor (Load Module File) using either the [Debug] - [Load target
file] menu, or the LOAD/OBJECT command in the Command window.

■Simulation Memory Space

Memory space access attributes can be specified byte-by-byte using the [Setup] - [Memory Map] menu.
The access attribute of unspecified memory space is Undefined.

■Memory Area Access Attributes

Access attributes for memory area can be specified as shown in Table 2.1-1 . A guarded access break
occurs if access is attempted against such access attribute while executing a program. When access is
made by a program command, such access is allowed regardless of the attribute, CODE, READ or WRITE.
However, access to memory in an undefined area causes an error.
Table 2.1-1 Types of Access Attributes
Attribute Semantics
CODE Instruction operation enabled
READ Data read enabled
WRITE Data write enabled
undefined Attribute undefined (access prohibited)