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Add "nooutput" pragma Add the "nooutput" pragma which causes assembly to proceed as normal for code with the exception that no output is generated for any instructions under this pragma. The current address is increased as usual and the symbol table is still constructed. However, no actual output is generated for lines operating under this pragma.
author William Astle <lost@l-w.ca>
date Thu, 01 Nov 2018 23:07:03 -0600
parents fc166b3bbae3
children
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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 >Symbols</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="UP"
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13 TITLE="LWASM"
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14 HREF="c62.html"><LINK
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15 REL="PREVIOUS"
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16 TITLE="Source Format"
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17 HREF="x227.html"><LINK
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18 REL="NEXT"
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19 TITLE="Numbers and Expressions"
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20 HREF="x242.html"></HEAD
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21 ><BODY
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22 CLASS="SECTION"
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23 BGCOLOR="#FFFFFF"
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24 TEXT="#000000"
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25 LINK="#0000FF"
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William Astle <lost@l-w.ca>
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26 VLINK="#840084"
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27 ALINK="#0000FF"
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28 ><DIV
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29 CLASS="NAVHEADER"
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30 ><TABLE
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31 SUMMARY="Header navigation table"
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32 WIDTH="100%"
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33 BORDER="0"
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34 CELLPADDING="0"
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35 CELLSPACING="0"
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William Astle <lost@l-w.ca>
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36 ><TR
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37 ><TH
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William Astle <lost@l-w.ca>
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38 COLSPAN="3"
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39 ALIGN="center"
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40 >LW Tool Chain</TH
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William Astle <lost@l-w.ca>
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41 ></TR
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William Astle <lost@l-w.ca>
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42 ><TR
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43 ><TD
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44 WIDTH="10%"
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45 ALIGN="left"
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46 VALIGN="bottom"
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William Astle <lost@l-w.ca>
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47 ><A
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48 HREF="x227.html"
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49 ACCESSKEY="P"
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50 >Prev</A
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51 ></TD
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52 ><TD
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53 WIDTH="80%"
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54 ALIGN="center"
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55 VALIGN="bottom"
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56 >Chapter 3. LWASM</TD
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57 ><TD
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58 WIDTH="10%"
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William Astle <lost@l-w.ca>
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59 ALIGN="right"
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60 VALIGN="bottom"
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William Astle <lost@l-w.ca>
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61 ><A
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William Astle <lost@l-w.ca>
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62 HREF="x242.html"
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63 ACCESSKEY="N"
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64 >Next</A
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65 ></TD
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66 ></TR
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67 ></TABLE
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68 ><HR
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69 ALIGN="LEFT"
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70 WIDTH="100%"></DIV
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William Astle <lost@l-w.ca>
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71 ><DIV
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William Astle <lost@l-w.ca>
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72 CLASS="SECTION"
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William Astle <lost@l-w.ca>
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73 ><H1
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William Astle <lost@l-w.ca>
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74 CLASS="SECTION"
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William Astle <lost@l-w.ca>
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75 ><A
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William Astle <lost@l-w.ca>
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76 NAME="AEN237"
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77 >3.4. Symbols</A
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78 ></H1
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79 ><P
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80 >Symbols have no length restriction. They may contain letters, numbers, dots,
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81 dollar signs, and underscores. They must start with a letter, dot, or
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William Astle <lost@l-w.ca>
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82 underscore.</P
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William Astle <lost@l-w.ca>
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83 ><P
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84 >LWASM also supports the concept of a local symbol. A local symbol is one
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85 which contains either a "?" or a "@", which can appear anywhere in the symbol.
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86 The scope of a local symbol is determined by a number of factors. First,
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87 each included file gets its own local symbol scope. A blank line will also
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88 be considered a local scope barrier. Macros each have their own local symbol
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89 scope as well (which has a side effect that you cannot use a local symbol
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90 as an argument to a macro). There are other factors as well. In general,
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91 a local symbol is restricted to the block of code it is defined within.</P
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92 ><P
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93 >By default, unless assembling to the os9 target, a "$" in the symbol will
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94 also make it local. This can be controlled by the "dollarlocal" and
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95 "nodollarlocal" pragmas. In the absence of a pragma to the contrary, for
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96 the os9 target, a "$" in the symbol will not make it considered local while
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97 for all other targets it will.</P
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98 ></DIV
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William Astle <lost@l-w.ca>
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99 ><DIV
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William Astle <lost@l-w.ca>
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100 CLASS="NAVFOOTER"
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William Astle <lost@l-w.ca>
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101 ><HR
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William Astle <lost@l-w.ca>
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102 ALIGN="LEFT"
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William Astle <lost@l-w.ca>
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103 WIDTH="100%"><TABLE
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William Astle <lost@l-w.ca>
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104 SUMMARY="Footer navigation table"
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105 WIDTH="100%"
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William Astle <lost@l-w.ca>
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106 BORDER="0"
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William Astle <lost@l-w.ca>
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107 CELLPADDING="0"
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William Astle <lost@l-w.ca>
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108 CELLSPACING="0"
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William Astle <lost@l-w.ca>
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109 ><TR
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William Astle <lost@l-w.ca>
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110 ><TD
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111 WIDTH="33%"
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112 ALIGN="left"
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113 VALIGN="top"
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William Astle <lost@l-w.ca>
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114 ><A
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William Astle <lost@l-w.ca>
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115 HREF="x227.html"
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116 ACCESSKEY="P"
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William Astle <lost@l-w.ca>
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117 >Prev</A
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William Astle <lost@l-w.ca>
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118 ></TD
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119 ><TD
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120 WIDTH="34%"
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121 ALIGN="center"
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William Astle <lost@l-w.ca>
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122 VALIGN="top"
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William Astle <lost@l-w.ca>
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123 ><A
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William Astle <lost@l-w.ca>
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124 HREF="index.html"
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William Astle <lost@l-w.ca>
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125 ACCESSKEY="H"
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William Astle <lost@l-w.ca>
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126 >Home</A
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William Astle <lost@l-w.ca>
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127 ></TD
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William Astle <lost@l-w.ca>
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128 ><TD
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129 WIDTH="33%"
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William Astle <lost@l-w.ca>
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130 ALIGN="right"
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William Astle <lost@l-w.ca>
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131 VALIGN="top"
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William Astle <lost@l-w.ca>
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132 ><A
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William Astle <lost@l-w.ca>
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133 HREF="x242.html"
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134 ACCESSKEY="N"
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135 >Next</A
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136 ></TD
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William Astle <lost@l-w.ca>
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137 ></TR
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William Astle <lost@l-w.ca>
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138 ><TR
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William Astle <lost@l-w.ca>
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139 ><TD
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140 WIDTH="33%"
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William Astle <lost@l-w.ca>
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141 ALIGN="left"
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William Astle <lost@l-w.ca>
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142 VALIGN="top"
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William Astle <lost@l-w.ca>
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143 >Source Format</TD
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William Astle <lost@l-w.ca>
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144 ><TD
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145 WIDTH="34%"
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William Astle <lost@l-w.ca>
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146 ALIGN="center"
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William Astle <lost@l-w.ca>
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147 VALIGN="top"
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William Astle <lost@l-w.ca>
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148 ><A
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William Astle <lost@l-w.ca>
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149 HREF="c62.html"
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William Astle <lost@l-w.ca>
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150 ACCESSKEY="U"
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William Astle <lost@l-w.ca>
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151 >Up</A
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William Astle <lost@l-w.ca>
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152 ></TD
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William Astle <lost@l-w.ca>
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153 ><TD
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William Astle <lost@l-w.ca>
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154 WIDTH="33%"
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William Astle <lost@l-w.ca>
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155 ALIGN="right"
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William Astle <lost@l-w.ca>
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156 VALIGN="top"
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157 >Numbers and Expressions</TD
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William Astle <lost@l-w.ca>
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158 ></TR
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William Astle <lost@l-w.ca>
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159 ></TABLE
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William Astle <lost@l-w.ca>
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160 ></DIV
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William Astle <lost@l-w.ca>
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161 ></BODY
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William Astle <lost@l-w.ca>
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162 ></HTML
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William Astle <lost@l-w.ca>
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163 >