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author lost@l-w.ca
date Sun, 19 Sep 2010 01:33:24 -0600
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1 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN""http://www.w3.org/TR/html4/loose.dtd">
2 <HTML
3 ><HEAD
4 ><TITLE
5 >Introduction</TITLE
6 ><META
7 NAME="GENERATOR"
8 CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK
9 REL="HOME"
10 TITLE="LW Tool Chain"
11 HREF="index.html"><LINK
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13 TITLE="LW Tool Chain"
14 HREF="index.html"><LINK
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16 TITLE="Output Formats"
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18 ><BODY
19 CLASS="CHAPTER"
20 BGCOLOR="#FFFFFF"
21 TEXT="#000000"
22 LINK="#0000FF"
23 VLINK="#840084"
24 ALINK="#0000FF"
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26 CLASS="NAVHEADER"
27 ><TABLE
28 SUMMARY="Header navigation table"
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30 BORDER="0"
31 CELLPADDING="0"
32 CELLSPACING="0"
33 ><TR
34 ><TH
35 COLSPAN="3"
36 ALIGN="center"
37 >LW Tool Chain</TH
38 ></TR
39 ><TR
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41 WIDTH="10%"
42 ALIGN="left"
43 VALIGN="bottom"
44 ><A
45 HREF="index.html"
46 ACCESSKEY="P"
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60 ACCESSKEY="N"
61 >Next</A
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66 ALIGN="LEFT"
67 WIDTH="100%"></DIV
68 ><DIV
69 CLASS="CHAPTER"
70 ><H1
71 ><A
72 NAME="AEN10"
73 ></A
74 >Chapter 1. Introduction</H1
75 ><P
76 >The LW tool chain provides utilities for building binaries for MC6809 and
77 HD6309 CPUs. The tool chain includes a cross-assembler and a cross-linker
78 which support several styles of output.</P
79 ><DIV
80 CLASS="SECTION"
81 ><H1
82 CLASS="SECTION"
83 ><A
84 NAME="AEN13"
85 >1.1. History</A
86 ></H1
87 ><P
88 >For a long time, I have had an interest in creating an operating system for
89 the Coco3. I finally started working on that project around the beginning of
90 2006. I had a number of assemblers I could choose from. Eventually, I settled
91 on one and started tinkering. After a while, I realized that assembler was not
92 going to be sufficient due to lack of macros and issues with forward references.
93 Then I tried another which handled forward references correctly but still did
94 not support macros. I looked around at other assemblers and they all lacked
95 one feature or another that I really wanted for creating my operating system.</P
96 ><P
97 >The solution seemed clear at that point. I am a fair programmer so I figured
98 I could write an assembler that would do everything I wanted an assembler to
99 do. Thus the LWASM probject was born. After more than two years of on and off
100 work, version 1.0 of LWASM was released in October of 2008.</P
101 ><P
102 >As the aforementioned operating system project progressed further, it became
103 clear that while assembling the whole project through a single file was doable,
104 it was not practical. When I found myself playing some fancy games with macros
105 in a bid to simulate sections, I realized I needed a means of assembling
106 source files separately and linking them later. This spawned a major development
107 effort to add an object file support to LWASM. It also spawned the LWLINK
108 project to provide a means to actually link the files.</P
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155 >LW Tool Chain</TD
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157 WIDTH="34%"
158 ALIGN="center"
159 VALIGN="top"
160 >&nbsp;</TD
161 ><TD
162 WIDTH="33%"
163 ALIGN="right"
164 VALIGN="top"
165 >Output Formats</TD
166 ></TR
167 ></TABLE
168 ></DIV
169 ></BODY
170 ></HTML
171 >