Panasonic PanaXSeries MN1030 Series, Руководство пользователя

Страница: 42 / 340

Chapter 3 Introduction to Operation
30 Assembling and Linking Multiple Sections
3.4 Assembling and Linking Multiple Sections
In section 3.3, "Basic Operation of the Assembler and Linker", source files each comprising one
section were assigned to the same section as a basic example. However, normally a program will be
divided into multiple sections to clearly divide programs by function and type.
The start addresses of a program in section format are set for each section during linking. Therefore,
when a program divided into multiple files is developed, work can proceed without the programmer
staying aware of the code size of each file. The programmer an also freely change the order in which
files are linked.
The following explanation illustrates a simple example dividing two source files into sections for each
routine, allocated to two sections.
Create source files
Using an editor, create the two programs shown below (program3.asm and program4.asm).
The contents of program3.asm are as follows.
global main
global data_set, time_filler
_CODE_00 section CODE, PUBLIC, 1
main
mov 0, A0
mov 0xff, D0
mov 0x80, D1
jsr data_set
jsr time_filler
bra main
_DATA section DATA, PUBLIC, 4
data1 ds 4
end