Panasonic MN1030 user manual Assembling and Linking Multiple Sections, Create source files

Chapter 3 Introduction to Operation

3.4Assembling 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
_CODE_00	global	data_set, time_filler
	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

30 Assembling and Linking Multiple Sections