434
|
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 >Source Format</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
|
|
12 REL="UP"
|
|
13 TITLE="LWASM"
|
|
14 HREF="c43.html"><LINK
|
|
15 REL="PREVIOUS"
|
|
16 TITLE="Dialects"
|
|
17 HREF="x161.html"><LINK
|
|
18 REL="NEXT"
|
|
19 TITLE="Symbols"
|
|
20 HREF="x178.html"></HEAD
|
|
21 ><BODY
|
|
22 CLASS="SECTION"
|
|
23 BGCOLOR="#FFFFFF"
|
|
24 TEXT="#000000"
|
|
25 LINK="#0000FF"
|
|
26 VLINK="#840084"
|
|
27 ALINK="#0000FF"
|
|
28 ><DIV
|
|
29 CLASS="NAVHEADER"
|
|
30 ><TABLE
|
|
31 SUMMARY="Header navigation table"
|
|
32 WIDTH="100%"
|
|
33 BORDER="0"
|
|
34 CELLPADDING="0"
|
|
35 CELLSPACING="0"
|
|
36 ><TR
|
|
37 ><TH
|
|
38 COLSPAN="3"
|
|
39 ALIGN="center"
|
|
40 >LW Tool Chain</TH
|
|
41 ></TR
|
|
42 ><TR
|
|
43 ><TD
|
|
44 WIDTH="10%"
|
|
45 ALIGN="left"
|
|
46 VALIGN="bottom"
|
|
47 ><A
|
|
48 HREF="x161.html"
|
|
49 ACCESSKEY="P"
|
|
50 >Prev</A
|
|
51 ></TD
|
|
52 ><TD
|
|
53 WIDTH="80%"
|
|
54 ALIGN="center"
|
|
55 VALIGN="bottom"
|
|
56 >Chapter 3. LWASM</TD
|
|
57 ><TD
|
|
58 WIDTH="10%"
|
|
59 ALIGN="right"
|
|
60 VALIGN="bottom"
|
|
61 ><A
|
|
62 HREF="x178.html"
|
|
63 ACCESSKEY="N"
|
|
64 >Next</A
|
|
65 ></TD
|
|
66 ></TR
|
|
67 ></TABLE
|
|
68 ><HR
|
|
69 ALIGN="LEFT"
|
|
70 WIDTH="100%"></DIV
|
|
71 ><DIV
|
|
72 CLASS="SECTION"
|
|
73 ><H1
|
|
74 CLASS="SECTION"
|
|
75 ><A
|
|
76 NAME="AEN168"
|
|
77 >3.3. Source Format</A
|
|
78 ></H1
|
|
79 ><P
|
|
80 >LWASM accepts plain text files in a relatively free form. It can handle
|
|
81 lines terminated with CR, LF, CRLF, or LFCR which means it should be able
|
|
82 to assemble files on any platform on which it compiles.</P
|
|
83 ><P
|
|
84 >Each line may start with a symbol. If a symbol is present, there must not
|
|
85 be any whitespace preceding it. It is legal for a line to contain nothing
|
|
86 but a symbol.</P
|
|
87 ><P
|
|
88 >The op code is separated from the symbol by whitespace. If there is
|
|
89 no symbol, there must be at least one white space character preceding it.
|
|
90 If applicable, the operand follows separated by whitespace. Following the
|
|
91 opcode and operand is an optional comment.</P
|
|
92 ><P
|
|
93 > It is important to note that operands cannot contain any whitespace
|
|
94 except in the case of delimited strings. This is because the first
|
|
95 whitespace character will be interpreted as the separator between the
|
|
96 operand column and the comment. This behaviour is required for approximate
|
|
97 source compatibility with other 6x09 assemblers. </P
|
|
98 ><P
|
|
99 >A comment can also be introduced with a * or a ;. The comment character is
|
|
100 optional for end of statement comments. However, if a symbol is the only
|
|
101 thing present on the line other than the comment, the comment character is
|
|
102 mandatory to prevent the assembler from interpreting the comment as an opcode.</P
|
|
103 ><P
|
|
104 >For compatibility with the output generated by some C preprocessors, LWASM
|
|
105 will also ignore lines that begin with a #. This should not be used as a general
|
|
106 comment character, however.</P
|
|
107 ><P
|
|
108 >The opcode is not treated case sensitively. Neither are register names in
|
|
109 the operand fields. Symbols, however, are case sensitive.</P
|
|
110 ><P
|
|
111 > As of version 2.6, LWASM supports files with line numbers. If line
|
|
112 numbers are present, the line must start with a digit. The line number
|
|
113 itself must consist only of digits. The line number must then be followed
|
|
114 by either the end of the line or exactly one white space character. After
|
|
115 that white space character, the lines are interpreted exactly as above. </P
|
|
116 ></DIV
|
|
117 ><DIV
|
|
118 CLASS="NAVFOOTER"
|
|
119 ><HR
|
|
120 ALIGN="LEFT"
|
|
121 WIDTH="100%"><TABLE
|
|
122 SUMMARY="Footer navigation table"
|
|
123 WIDTH="100%"
|
|
124 BORDER="0"
|
|
125 CELLPADDING="0"
|
|
126 CELLSPACING="0"
|
|
127 ><TR
|
|
128 ><TD
|
|
129 WIDTH="33%"
|
|
130 ALIGN="left"
|
|
131 VALIGN="top"
|
|
132 ><A
|
|
133 HREF="x161.html"
|
|
134 ACCESSKEY="P"
|
|
135 >Prev</A
|
|
136 ></TD
|
|
137 ><TD
|
|
138 WIDTH="34%"
|
|
139 ALIGN="center"
|
|
140 VALIGN="top"
|
|
141 ><A
|
|
142 HREF="index.html"
|
|
143 ACCESSKEY="H"
|
|
144 >Home</A
|
|
145 ></TD
|
|
146 ><TD
|
|
147 WIDTH="33%"
|
|
148 ALIGN="right"
|
|
149 VALIGN="top"
|
|
150 ><A
|
|
151 HREF="x178.html"
|
|
152 ACCESSKEY="N"
|
|
153 >Next</A
|
|
154 ></TD
|
|
155 ></TR
|
|
156 ><TR
|
|
157 ><TD
|
|
158 WIDTH="33%"
|
|
159 ALIGN="left"
|
|
160 VALIGN="top"
|
|
161 >Dialects</TD
|
|
162 ><TD
|
|
163 WIDTH="34%"
|
|
164 ALIGN="center"
|
|
165 VALIGN="top"
|
|
166 ><A
|
|
167 HREF="c43.html"
|
|
168 ACCESSKEY="U"
|
|
169 >Up</A
|
|
170 ></TD
|
|
171 ><TD
|
|
172 WIDTH="33%"
|
|
173 ALIGN="right"
|
|
174 VALIGN="top"
|
|
175 >Symbols</TD
|
|
176 ></TR
|
|
177 ></TABLE
|
|
178 ></DIV
|
|
179 ></BODY
|
|
180 ></HTML
|
|
181 > |