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1 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN""http://www.w3.org/TR/html4/loose.dtd">
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2 <HTML
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3 ><HEAD
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4 ><TITLE
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5 >Introduction</TITLE
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6 ><META
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7 NAME="GENERATOR"
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8 CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK
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9 REL="HOME"
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10 TITLE="LW Tool Chain"
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11 HREF="index.html"><LINK
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12 REL="PREVIOUS"
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13 TITLE="LW Tool Chain"
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14 HREF="index.html"><LINK
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15 REL="NEXT"
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16 TITLE="Output Formats"
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17 HREF="c18.html"></HEAD
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18 ><BODY
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19 CLASS="CHAPTER"
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20 BGCOLOR="#FFFFFF"
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21 TEXT="#000000"
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22 LINK="#0000FF"
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23 VLINK="#840084"
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24 ALINK="#0000FF"
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25 ><DIV
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26 CLASS="NAVHEADER"
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27 ><TABLE
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28 SUMMARY="Header navigation table"
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29 WIDTH="100%"
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30 BORDER="0"
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31 CELLPADDING="0"
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32 CELLSPACING="0"
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33 ><TR
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34 ><TH
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35 COLSPAN="3"
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36 ALIGN="center"
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37 >LW Tool Chain</TH
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38 ></TR
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39 ><TR
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40 ><TD
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41 WIDTH="10%"
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42 ALIGN="left"
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43 VALIGN="bottom"
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44 ><A
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45 HREF="index.html"
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46 ACCESSKEY="P"
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47 >Prev</A
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48 ></TD
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49 ><TD
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50 WIDTH="80%"
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51 ALIGN="center"
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52 VALIGN="bottom"
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53 ></TD
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54 ><TD
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55 WIDTH="10%"
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56 ALIGN="right"
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57 VALIGN="bottom"
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58 ><A
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59 HREF="c18.html"
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60 ACCESSKEY="N"
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61 >Next</A
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62 ></TD
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63 ></TR
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64 ></TABLE
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65 ><HR
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66 ALIGN="LEFT"
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67 WIDTH="100%"></DIV
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68 ><DIV
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69 CLASS="CHAPTER"
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70 ><H1
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71 ><A
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72 NAME="AEN10"
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73 ></A
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74 >Chapter 1. Introduction</H1
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75 ><P
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76 >The LW tool chain provides utilities for building binaries for MC6809 and
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77 HD6309 CPUs. The tool chain includes a cross-assembler and a cross-linker
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78 which support several styles of output.</P
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79 ><DIV
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80 CLASS="SECTION"
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81 ><H1
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82 CLASS="SECTION"
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83 ><A
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84 NAME="AEN13"
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85 >1.1. History</A
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86 ></H1
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87 ><P
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88 >For a long time, I have had an interest in creating an operating system for
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89 the Coco3. I finally started working on that project around the beginning of
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90 2006. I had a number of assemblers I could choose from. Eventually, I settled
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91 on one and started tinkering. After a while, I realized that assembler was not
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92 going to be sufficient due to lack of macros and issues with forward references.
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93 Then I tried another which handled forward references correctly but still did
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94 not support macros. I looked around at other assemblers and they all lacked
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95 one feature or another that I really wanted for creating my operating system.</P
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96 ><P
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97 >The solution seemed clear at that point. I am a fair programmer so I figured
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98 I could write an assembler that would do everything I wanted an assembler to
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99 do. Thus the LWASM probject was born. After more than two years of on and off
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100 work, version 1.0 of LWASM was released in October of 2008.</P
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101 ><P
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102 >As the aforementioned operating system project progressed further, it became
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103 clear that while assembling the whole project through a single file was doable,
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104 it was not practical. When I found myself playing some fancy games with macros
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105 in a bid to simulate sections, I realized I needed a means of assembling
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106 source files separately and linking them later. This spawned a major development
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107 effort to add an object file support to LWASM. It also spawned the LWLINK
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108 project to provide a means to actually link the files.</P
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109 ></DIV
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110 ></DIV
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111 ><DIV
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112 CLASS="NAVFOOTER"
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113 ><HR
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114 ALIGN="LEFT"
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115 WIDTH="100%"><TABLE
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116 SUMMARY="Footer navigation table"
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118 BORDER="0"
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120 CELLSPACING="0"
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121 ><TR
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122 ><TD
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123 WIDTH="33%"
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124 ALIGN="left"
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125 VALIGN="top"
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126 ><A
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127 HREF="index.html"
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128 ACCESSKEY="P"
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129 >Prev</A
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130 ></TD
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131 ><TD
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132 WIDTH="34%"
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133 ALIGN="center"
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134 VALIGN="top"
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135 ><A
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136 HREF="index.html"
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137 ACCESSKEY="H"
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138 >Home</A
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139 ></TD
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140 ><TD
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141 WIDTH="33%"
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142 ALIGN="right"
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143 VALIGN="top"
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144 ><A
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145 HREF="c18.html"
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146 ACCESSKEY="N"
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147 >Next</A
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148 ></TD
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149 ></TR
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150 ><TR
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151 ><TD
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152 WIDTH="33%"
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153 ALIGN="left"
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154 VALIGN="top"
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155 >LW Tool Chain</TD
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156 ><TD
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157 WIDTH="34%"
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158 ALIGN="center"
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159 VALIGN="top"
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160 > </TD
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161 ><TD
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162 WIDTH="33%"
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163 ALIGN="right"
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164 VALIGN="top"
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165 >Output Formats</TD
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166 ></TR
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167 ></TABLE
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168 ></DIV
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169 ></BODY
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170 ></HTML
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171 > |
