Mercurial > hg > Members > kono > nitros9-code

annotate level1/cmds/mfree.asm @ 827:6653afab1671

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Made smaller, better!
author boisy
date Tue, 14 Jan 2003 02:58:01 +0000
parents e9ce43cc215e
children c155aac72190
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 ********************************************************************
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2 * Mfree - Show free memory
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3 *
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4 * $Id$
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5 *
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6 * Ed. Comments Who YY/MM/DD
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7 * ------------------------------------------------------------------
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8 * 5 From Tandy OS-9 Level One VR 02.00.00
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9
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10 nam Mfree
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11 ttl Show free memory
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12
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13 * Disassembled 02/04/05 15:22:05 by Disasm v1.6 (C) 1988 by RML
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14
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15 ifp1
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16 use defsfile
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17 endc
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18
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19 tylg set Prgrm+Objct
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20 atrv set ReEnt+rev
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21 rev set $01
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22 edition set 5
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23 stdout set 1
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24
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25 mod eom,name,tylg,atrv,start,size
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26
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27 fmbegin rmb 2
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28 fmend rmb 2
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29 u0004 rmb 1
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30 u0005 rmb 1
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31 upper rmb 2 Upper boundary of free segment
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32 lower rmb 2 Lower boundary of free segment
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33 pages rmb 1
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34 bufptr rmb 2
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35 buffer rmb 530
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36 size equ .
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37
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38 name fcs /Mfree/
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39 fcb edition
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40
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41 header fcb C$LF
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42 fcc " Address pages"
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43 fcb C$LF
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44 fcc "--------- -----"
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45 fcb $80+C$CR
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46 totfree fcb C$LF
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47 fcs "Total pages free = "
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48 L0048 fcs "Graphics Memory "
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49 notalloc fcs "Not Allocated"
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50 ataddr fcs "at: $"
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51
90
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52 start leay buffer,u
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53 sty <bufptr
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54 leay <header,pcr
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55 bsr ApndStr
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56 bsr print
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57 ldx >D.FMBM The free memory bitmap pointer start
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58 stx <fmbegin
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59 ldx >D.FMBM+2 The free memory bitmap pointer end
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60 stx <fmend
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61 clra
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62 clrb
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63 sta <u0005 Clear
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64 std <upper Clear
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65 std <lower Clear
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66 stb <pages Clear
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67 ldx <fmbegin
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68 nextbyte lda ,x+
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69 bsr L00A8
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70 cmpx <fmend
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71 bcs nextbyte
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72 bsr L00B8
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73 leay <totfree,pcr
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74 bsr ApndStr
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75 ldb <u0005
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76 bsr bDeci
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77 bsr print
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78 lbsr display
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79 clrb
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80 os9 F$Exit
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81 *
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82 L00A8 bsr L00AA
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83 L00AA bsr L00AC
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84 L00AC bsr L00AE
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85 L00AE lsla
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86 bcs L00B8
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87 inc <u0005
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88 inc <pages
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89 inc <upper
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90 rts
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91 L00B8 pshs b,a
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92 ldb <pages
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93 beq L00D7
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94 ldd <lower
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95 bsr dHexa
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96 lda #$2D '-' char
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97 bsr ApndA
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98 ldd <upper
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99 subd #$0001
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100 bsr dHexa
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101 bsr aspace Append a space to buffer
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102 bsr aspace Append a space to buffer
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103 ldb <pages
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104 bsr bDeci
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105 bsr print
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106 L00D7 inc <upper
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107 ldd <upper
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108 std <lower
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109 clr <pages
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110 puls pc,b,a
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111 *
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112 * Append string (in reg y) to buffer
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113 *
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114 ApndStr lda ,y
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115 anda #$7F
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116 bsr ApndA
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117 lda ,y+
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118 bpl ApndStr
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119 rts
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120 *
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121 * Print the buffer
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122 *
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123 print pshs y,x,a
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124 lda #C$CR Add form feed to buffer
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125 bsr ApndA
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126 leax buffer,u Reset bufptr to start of buffer
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127 stx <bufptr
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128 ldy #80 Max line length = 80
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129 lda #stdout
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130 os9 I$WritLn
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131 puls pc,y,x,a
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132 *
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133 * Appends the content of register B in decimal
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134 * to the buffer
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135 *
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136 bDeci lda #$FF
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137 clr <u0004
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138 L0105 inca
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139 subb #$64
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140 bcc L0105
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141 bsr L0119
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142 lda #$0A
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143 L010E deca
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144 addb #$0A
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145 bcc L010E
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146 bsr L0119
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147 tfr b,a
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148 inc <u0004
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149 L0119 tsta
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150 beq L011E
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151 sta <u0004
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152 L011E tst <u0004
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153 bne L0124
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154 aspace lda #$F0
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155 L0124 adda #$30 Offset to "0" in ascii table
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156 cmpa #$3A
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157 bcs ApndA
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158 adda #$07
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159 *
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160 * Append character (in a) to buffer
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161 *
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162 ApndA pshs x
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163 ldx <bufptr
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164 sta ,x+
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165 stx <bufptr
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166 puls pc,x
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167 *
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168 * Append register D as hex string to buffer
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169 *
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170 dHexa clr <u0004
0
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171 bsr L013C
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172 tfr b,a
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173 L013C pshs a
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174 lsra
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175 lsra
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176 lsra
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177 lsra
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178 bsr L0146
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179 puls a
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180 L0146 anda #$0F
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181 bra L0119
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182 display pshs y,x
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183 leay >L0048,pcr
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184 bsr ApndStr
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185 lda #stdout
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186 ldb #SS.DStat
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187 os9 I$GetStt
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188 bcc L0163
90
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189 leay >notalloc,pcr
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190 bsr ApndStr
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191 bra L016E
90
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192 L0163 leay >ataddr,pcr
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193 lbsr ApndStr
0
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194 tfr x,d
90
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195 bsr dHexa
0
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196 L016E puls y,x
90
6aa54d3691e5 I needed to understand how OS9 does its memory housekeeping.
roug
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197 lbra print
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0912ac5dc2ff Added initial and dates to some source files
boisy
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198
0
6641a883d6b0 Initial revision
boisy
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199 emod
6641a883d6b0 Initial revision
boisy
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200 eom equ *
15
0912ac5dc2ff Added initial and dates to some source files
boisy
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201 end
0912ac5dc2ff Added initial and dates to some source files
boisy
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202