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Rev | Author | Line No. | Line |
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72 | diamond | 1 | ; System function 70 - files with long names (LFN) |
71 | diamond | 2 | ; diamond, 2006 |
3 | |||
4 | iglobal |
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5 | ; in this table names must be in lowercase |
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6 | rootdirs: |
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75 | diamond | 7 | db 2,'rd' |
8 | dd fs_OnRamdisk |
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9 | dd fs_NextRamdisk |
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10 | db 7,'ramdisk' |
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11 | dd fs_OnRamdisk |
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12 | dd fs_NextRamdisk |
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13 | db 2,'fd' |
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14 | dd fs_OnFloppy |
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15 | dd fs_NextFloppy |
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16 | db 10,'floppydisk' |
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17 | dd fs_OnFloppy |
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18 | dd fs_NextFloppy |
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19 | db 3,'hd0' |
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20 | dd fs_OnHd0 |
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21 | dd fs_NextHd0 |
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22 | db 3,'hd1' |
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23 | dd fs_OnHd1 |
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24 | dd fs_NextHd1 |
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25 | db 3,'hd2' |
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26 | dd fs_OnHd2 |
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27 | dd fs_NextHd2 |
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28 | db 3,'hd3' |
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29 | dd fs_OnHd3 |
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30 | dd fs_NextHd3 |
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31 | db 0 |
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32 | |||
33 | virtual_root_query: |
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34 | dd fs_HasRamdisk |
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35 | du 'rd',0 |
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36 | dd fs_HasFloppy |
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37 | du 'fd',0 |
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38 | dd fs_HasHd0 |
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39 | du 'hd0',0 |
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40 | dd fs_HasHd1 |
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41 | du 'hd1',0 |
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42 | dd fs_HasHd2 |
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43 | du 'hd2',0 |
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44 | dd fs_HasHd3 |
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45 | du 'hd3',0 |
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46 | dd 0 |
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71 | diamond | 47 | endg |
48 | |||
49 | file_system_lfn: |
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50 | ; in: eax->fileinfo block |
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51 | ; operation codes: |
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72 | diamond | 52 | ; 0 : read file |
75 | diamond | 53 | ; 1 : read folder |
54 | ; 2 : rewrite file - not implemented yet |
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72 | diamond | 55 | ; 3 : write/append to file - not implemented yet |
75 | diamond | 56 | ; 4 : start application - not implemented yet |
57 | ; 5 : delete file - not implemented yet |
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58 | ; 6 : create directory - not implemented yet |
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59 | ; 7 : rename file/directory - not implemented yet |
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60 | ; 8 : get file attributes structure - not implemented yet |
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71 | diamond | 61 | |
75 | diamond | 62 | add eax, std_application_base_address |
71 | diamond | 63 | ; parse file name |
75 | diamond | 64 | xchg ebx, eax |
65 | lea esi, [ebx+20] |
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66 | lodsb |
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67 | cmp al, '/' |
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68 | jz @f |
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71 | diamond | 69 | .notfound: |
75 | diamond | 70 | mov dword [esp+36], 5 ; file not found |
71 | ret |
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71 | diamond | 72 | @@: |
75 | diamond | 73 | cmp byte [esi], 0 |
74 | jz .rootdir |
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75 | mov edi, rootdirs-8 |
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76 | xor ecx, ecx |
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77 | push esi |
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71 | diamond | 78 | .scan1: |
75 | diamond | 79 | pop esi |
80 | add edi, ecx |
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81 | scasd |
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82 | scasd |
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83 | mov cl, byte [edi] |
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84 | jecxz .notfound |
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85 | inc edi |
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86 | push esi |
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71 | diamond | 87 | @@: |
75 | diamond | 88 | lodsb |
89 | or al, 20h |
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90 | scasb |
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91 | loopz @b |
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92 | jnz .scan1 |
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93 | lodsb |
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94 | cmp al, '/' |
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95 | jz .found1 |
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96 | test al, al |
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97 | jnz .scan1 |
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98 | pop eax |
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71 | diamond | 99 | ; directory /xxx |
100 | .maindir: |
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75 | diamond | 101 | cmp dword [ebx], 1 |
102 | jnz .access_denied |
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103 | xor eax, eax |
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104 | mov ebp, [ebx+12] |
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105 | mov edx, [ebx+16] |
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106 | add edx, std_application_base_address |
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107 | mov ebx, [ebx+4] |
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108 | mov esi, [edi+4] |
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109 | ; ebx=first block, ebp=number of blocks, edx=return area, esi='Next' handler |
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110 | mov edi, edx |
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111 | mov ecx, 32/4 |
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112 | rep stosd |
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113 | mov byte [edx], 1 ; version |
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114 | .maindir_loop: |
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115 | call esi |
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116 | jc .maindir_done |
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117 | inc dword [edx+8] |
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118 | dec ebx |
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119 | jns .maindir_loop |
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120 | dec ebp |
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121 | js .maindir_loop |
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122 | inc dword [edx+4] |
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123 | mov dword [edi], 0x10 ; attributes: folder |
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124 | mov dword [edi+4], 1 ; name type: UNICODE |
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125 | push eax |
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126 | xor eax, eax |
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127 | add edi, 8 |
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128 | mov ecx, 40/4-2 |
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129 | rep stosd |
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130 | pop eax |
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131 | push eax edx |
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132 | ; convert number in eax to decimal UNICODE string |
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133 | push edi |
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134 | push -'0' |
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135 | mov cl, 10 |
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136 | @@: |
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137 | xor edx, edx |
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138 | div ecx |
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139 | push edx |
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140 | test eax, eax |
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141 | jnz @b |
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142 | @@: |
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143 | pop eax |
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144 | add al, '0' |
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145 | stosw |
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146 | jnz @b |
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147 | mov byte [edi-1], 0 |
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148 | pop edi |
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149 | add edi, 520 |
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150 | pop edx eax |
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151 | jmp .maindir_loop |
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152 | .maindir_done: |
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153 | mov ebx, [edx+8] |
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154 | xor eax, eax |
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155 | dec ebp |
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156 | js @f |
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157 | mov al, ERROR_END_OF_FILE |
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158 | @@: |
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159 | mov [esp+36], eax |
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160 | mov [esp+24], ebx |
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161 | ret |
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71 | diamond | 162 | ; directory / |
163 | .rootdir: |
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75 | diamond | 164 | cmp dword [ebx], 1 ; read folder? |
165 | jz .readroot |
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166 | .access_denied: |
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167 | mov dword [esp+36], 10 ; access denied |
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168 | ret |
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71 | diamond | 169 | |
75 | diamond | 170 | .readroot: |
171 | ; virtual root folder - special handler |
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172 | mov esi, virtual_root_query |
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173 | mov ebp, [ebx+12] |
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174 | mov edx, [ebx+16] |
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175 | add edx, std_application_base_address |
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176 | mov ebx, [ebx+4] |
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177 | xor eax, eax |
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178 | ; eax=0, ebx=first block, ebp=number of blocks, edx=return area |
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179 | mov edi, edx |
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180 | mov ecx, 32/4 |
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181 | rep stosd |
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182 | mov byte [edx], 1 ; version |
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183 | .readroot_loop: |
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184 | cmp dword [esi], eax |
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185 | jz .readroot_done |
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186 | call dword [esi] |
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187 | add esi, 4 |
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188 | test eax, eax |
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189 | jnz @f |
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190 | .readroot_next: |
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191 | or ecx, -1 |
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192 | xchg esi, edi |
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193 | repnz scasw |
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194 | xchg esi, edi |
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195 | jmp .readroot_loop |
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196 | @@: |
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197 | xor eax, eax |
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198 | inc dword [edx+8] |
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199 | dec ebx |
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200 | jns .readroot_next |
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201 | dec ebp |
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202 | js .readroot_next |
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203 | inc dword [edx+4] |
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204 | mov dword [edi], 0x10 ; attributes: folder |
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205 | mov dword [edi+4], 1 ; name type: UNICODE |
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206 | add edi, 8 |
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207 | mov ecx, 40/4-2 |
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208 | rep stosd |
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209 | push edi |
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210 | @@: |
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211 | lodsw |
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212 | stosw |
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213 | test eax, eax |
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214 | jnz @b |
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215 | pop edi |
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216 | add edi, 520 |
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217 | jmp .readroot_loop |
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218 | .readroot_done: |
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219 | mov ebx, [edx+8] |
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220 | xor eax, eax |
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221 | dec ebp |
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222 | js @f |
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223 | mov al, ERROR_END_OF_FILE |
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224 | @@: |
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225 | mov [esp+36], eax |
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226 | mov [esp+24], ebx |
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227 | ret |
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228 | |||
71 | diamond | 229 | .found1: |
75 | diamond | 230 | pop eax |
231 | cmp byte [esi], 0 |
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232 | jz .maindir |
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71 | diamond | 233 | ; read partition number |
75 | diamond | 234 | xor ecx, ecx |
235 | xor eax, eax |
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71 | diamond | 236 | @@: |
75 | diamond | 237 | lodsb |
238 | cmp al, '/' |
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239 | jz .done1 |
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240 | test al, al |
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241 | jz .done1 |
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242 | sub al, '0' |
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243 | cmp al, 9 |
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244 | ja .notfound |
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245 | imul ecx, 10 |
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246 | add ecx, eax |
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247 | jmp @b |
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71 | diamond | 248 | .done1: |
75 | diamond | 249 | test ecx, ecx |
250 | jz .notfound |
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251 | test al, al |
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252 | jnz @f |
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253 | dec esi |
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71 | diamond | 254 | @@: |
75 | diamond | 255 | ; now [edi] contains handler address, ecx - partition number, |
256 | ; esi points to ASCIIZ string - rest of name |
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257 | jmp dword [edi] |
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71 | diamond | 258 | |
259 | ; handlers for devices |
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75 | diamond | 260 | ; in: ecx = 0 => query virtual directory /xxx |
71 | diamond | 261 | ; in: ecx = partition number |
262 | ; esi -> relative (for device) name |
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263 | ; ebx -> fileinfo |
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264 | ; out: [esp+36]=image of eax, [esp+24]=image of ebx |
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265 | |||
266 | fs_OnRamdisk: |
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75 | diamond | 267 | cmp ecx, 1 |
268 | jnz file_system_lfn.notfound |
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269 | mov eax, [ebx] |
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270 | cmp eax, 1 |
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271 | ja .not_impl |
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272 | mov ecx, [ebx+12] |
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273 | mov edx, [ebx+16] |
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274 | add edx, std_application_base_address |
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275 | add ebx, 4 |
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276 | call dword [fs_RamdiskServices + eax*4] |
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277 | mov [esp+36], eax |
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278 | mov [esp+24], ebx |
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279 | ret |
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71 | diamond | 280 | .not_impl: |
75 | diamond | 281 | mov dword [esp+36], 2 ; not implemented |
282 | ret |
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71 | diamond | 283 | |
284 | fs_RamdiskServices: |
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75 | diamond | 285 | dd fs_RamdiskRead |
286 | dd fs_RamdiskReadFolder |
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71 | diamond | 287 | |
288 | fs_OnFloppy: |
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75 | diamond | 289 | cmp ecx, 2 |
290 | ja file_system_lfn.notfound |
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291 | mov eax, [ebx] |
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292 | cmp eax, 1 |
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293 | ja fs_OnRamdisk.not_impl |
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294 | call reserve_flp |
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295 | mov [flp_number], cl |
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296 | mov ecx, [ebx+12] |
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297 | mov edx, [ebx+16] |
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298 | add edx, std_application_base_address |
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299 | add ebx, 4 |
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300 | call dword [fs_FloppyServices + eax*4] |
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301 | and [flp_status], 0 |
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302 | mov [esp+36], eax |
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303 | mov [esp+24], ebx |
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304 | ret |
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71 | diamond | 305 | |
306 | fs_FloppyServices: |
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75 | diamond | 307 | dd fs_FloppyRead |
308 | dd fs_FloppyReadFolder |
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71 | diamond | 309 | |
310 | fs_OnHd0: |
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75 | diamond | 311 | call reserve_hd1 |
312 | mov [hdbase], 0x1F0 |
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313 | mov [hdid], 0 |
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314 | push 1 |
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315 | jmp fs_OnHd |
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71 | diamond | 316 | fs_OnHd1: |
75 | diamond | 317 | call reserve_hd1 |
318 | mov [hdbase], 0x1F0 |
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319 | mov [hdid], 0x10 |
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320 | push 2 |
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321 | jmp fs_OnHd |
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71 | diamond | 322 | fs_OnHd2: |
75 | diamond | 323 | call reserve_hd1 |
324 | mov [hdbase], 0x170 |
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325 | mov [hdid], 0 |
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326 | push 3 |
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327 | jmp fs_OnHd |
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71 | diamond | 328 | fs_OnHd3: |
75 | diamond | 329 | call reserve_hd1 |
330 | mov [hdbase], 0x170 |
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331 | mov [hdid], 0x10 |
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332 | push 4 |
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71 | diamond | 333 | fs_OnHd: |
75 | diamond | 334 | pop eax |
335 | mov [hdpos], eax |
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336 | cmp ecx, 0x100 |
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337 | jae .nf |
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338 | cmp cl, [0x40001+eax] |
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339 | jbe @f |
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340 | .nf: |
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341 | and [hd1_status], 0 |
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342 | mov dword [esp+36], 5 ; not found |
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343 | ret |
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71 | diamond | 344 | @@: |
75 | diamond | 345 | mov [fat32part], ecx |
346 | push ebx esi |
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347 | call choice_necessity_partition_1 |
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348 | pop esi ebx |
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349 | mov ecx, [ebx+12] |
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350 | mov edx, [ebx+16] |
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351 | add edx, std_application_base_address |
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352 | mov eax, [ebx] |
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353 | cmp eax, 1 |
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354 | ja .not_impl |
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355 | add ebx, 4 |
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356 | call dword [fs_HdServices + eax*4] |
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357 | and [hd1_status], 0 |
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358 | mov [esp+36], eax |
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359 | mov [esp+24], ebx |
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360 | ret |
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361 | .not_impl: |
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362 | and [hd1_status], 0 |
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363 | mov dword [esp+36], 2 ; not implemented |
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364 | ret |
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71 | diamond | 365 | |
366 | fs_HdServices: |
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75 | diamond | 367 | dd fs_HdRead |
368 | dd fs_HdReadFolder |
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369 | |||
370 | fs_HasRamdisk: |
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371 | mov al, 1 ; we always have ramdisk |
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372 | ret |
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373 | |||
374 | fs_HasFloppy: |
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375 | cmp byte [0x40000], 0 |
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376 | setnz al |
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377 | ret |
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378 | |||
379 | fs_HasHd0: |
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380 | mov al, [0x40001] |
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381 | and al, 11000000b |
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382 | cmp al, 01000000b |
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383 | setz al |
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384 | ret |
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385 | fs_HasHd1: |
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386 | mov al, [0x40001] |
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387 | and al, 00110000b |
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388 | cmp al, 00010000b |
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389 | setz al |
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390 | ret |
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391 | fs_HasHd2: |
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392 | mov al, [0x40001] |
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393 | and al, 00001100b |
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394 | cmp al, 00000100b |
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395 | setz al |
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396 | ret |
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397 | fs_HasHd3: |
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398 | mov al, [0x40001] |
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399 | and al, 00000011b |
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400 | cmp al, 00000001b |
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401 | setz al |
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402 | ret |
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403 | |||
404 | ; fs_NextXXX functions: |
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405 | ; in: eax = partition number, from which start to scan |
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406 | ; out: CF=1 => no more partitions |
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407 | ; CF=0 => eax=next partition number |
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408 | |||
409 | fs_NextRamdisk: |
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410 | ; we always have /rd/1 |
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411 | test eax, eax |
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412 | stc |
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413 | jnz @f |
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414 | mov al, 1 |
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415 | clc |
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416 | @@: |
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417 | ret |
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418 | |||
419 | fs_NextFloppy: |
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420 | ; we have /fd/1 iff (([0x40000] and 0xF0) != 0) and /fd/2 iff (([0x40000] and 0x0F) != 0) |
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421 | test byte [0x40000], 0xF0 |
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422 | jz .no1 |
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423 | test eax, eax |
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424 | jnz .no1 |
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425 | inc eax |
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426 | ret ; CF cleared |
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427 | .no1: |
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428 | test byte [0x40000], 0x0F |
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429 | jz .no2 |
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430 | cmp al, 2 |
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431 | jae .no2 |
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432 | mov al, 2 |
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433 | clc |
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434 | ret |
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435 | .no2: |
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436 | stc |
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437 | ret |
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438 | |||
439 | ; on hdx, we have partitions from 1 to [0x40002+x] |
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440 | fs_NextHd0: |
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441 | push 0 |
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442 | jmp fs_NextHd |
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443 | fs_NextHd1: |
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444 | push 1 |
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445 | jmp fs_NextHd |
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446 | fs_NextHd2: |
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447 | push 2 |
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448 | jmp fs_NextHd |
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449 | fs_NextHd3: |
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450 | push 3 |
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451 | fs_NextHd: |
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452 | pop ecx |
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453 | movzx ecx, byte [0x40002+ecx] |
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454 | cmp eax, ecx |
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455 | jae fs_NextFloppy.no2 |
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456 | inc eax |
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457 | clc |
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458 | ret |