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Rev | Author | Line No. | Line |
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425 | victor | 1 | $Revision: 431 $ |
431 | serge | 2 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
3 | ;; ;; |
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4 | ;; Copyright (C) KolibriOS team 2004-2007. All rights reserved. ;; |
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5 | ;; Distributed under terms of the GNU General Public License ;; |
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6 | ;; ;; |
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7 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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8 | |||
72 | diamond | 9 | ; System function 70 - files with long names (LFN) |
71 | diamond | 10 | ; diamond, 2006 |
11 | |||
12 | iglobal |
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13 | ; in this table names must be in lowercase |
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14 | rootdirs: |
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75 | diamond | 15 | db 2,'rd' |
16 | dd fs_OnRamdisk |
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17 | dd fs_NextRamdisk |
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18 | db 7,'ramdisk' |
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19 | dd fs_OnRamdisk |
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20 | dd fs_NextRamdisk |
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21 | db 2,'fd' |
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22 | dd fs_OnFloppy |
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23 | dd fs_NextFloppy |
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24 | db 10,'floppydisk' |
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25 | dd fs_OnFloppy |
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26 | dd fs_NextFloppy |
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27 | db 3,'hd0' |
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28 | dd fs_OnHd0 |
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29 | dd fs_NextHd0 |
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30 | db 3,'hd1' |
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31 | dd fs_OnHd1 |
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32 | dd fs_NextHd1 |
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33 | db 3,'hd2' |
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34 | dd fs_OnHd2 |
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35 | dd fs_NextHd2 |
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36 | db 3,'hd3' |
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37 | dd fs_OnHd3 |
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38 | dd fs_NextHd3 |
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87 | mario79 | 39 | ;********************************************** |
40 | db 3,'cd0' |
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41 | dd fs_OnCd0 |
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42 | dd fs_NextCd |
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43 | db 3,'cd1' |
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44 | dd fs_OnCd1 |
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45 | dd fs_NextCd |
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46 | db 3,'cd2' |
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47 | dd fs_OnCd2 |
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48 | dd fs_NextCd |
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49 | db 3,'cd3' |
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50 | dd fs_OnCd3 |
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51 | dd fs_NextCd |
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237 | serge | 52 | ;*********************************************** |
75 | diamond | 53 | db 0 |
54 | |||
87 | mario79 | 55 | |
75 | diamond | 56 | virtual_root_query: |
57 | dd fs_HasRamdisk |
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78 | diamond | 58 | db 'rd',0 |
75 | diamond | 59 | dd fs_HasFloppy |
78 | diamond | 60 | db 'fd',0 |
75 | diamond | 61 | dd fs_HasHd0 |
78 | diamond | 62 | db 'hd0',0 |
75 | diamond | 63 | dd fs_HasHd1 |
78 | diamond | 64 | db 'hd1',0 |
75 | diamond | 65 | dd fs_HasHd2 |
78 | diamond | 66 | db 'hd2',0 |
75 | diamond | 67 | dd fs_HasHd3 |
78 | diamond | 68 | db 'hd3',0 |
87 | mario79 | 69 | ;********************************************** |
70 | dd fs_HasCd0 |
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71 | db 'cd0',0 |
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72 | dd fs_HasCd1 |
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73 | db 'cd1',0 |
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74 | dd fs_HasCd2 |
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75 | db 'cd2',0 |
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76 | dd fs_HasCd3 |
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77 | db 'cd3',0 |
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78 | ;********************************************** |
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75 | diamond | 79 | dd 0 |
71 | diamond | 80 | endg |
81 | |||
82 | file_system_lfn: |
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83 | ; in: eax->fileinfo block |
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84 | ; operation codes: |
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72 | diamond | 85 | ; 0 : read file |
75 | diamond | 86 | ; 1 : read folder |
83 | diamond | 87 | ; 2 : create/rewrite file |
133 | diamond | 88 | ; 3 : write/append to file |
89 | ; 4 : set end of file |
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86 | diamond | 90 | ; 5 : get file/directory attributes structure |
91 | ; 6 : set file/directory attributes structure |
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91 | diamond | 92 | ; 7 : start application |
171 | diamond | 93 | ; 8 : delete file |
321 | diamond | 94 | ; 9 : create directory |
71 | diamond | 95 | |
75 | diamond | 96 | add eax, std_application_base_address |
71 | diamond | 97 | ; parse file name |
75 | diamond | 98 | xchg ebx, eax |
99 | lea esi, [ebx+20] |
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91 | diamond | 100 | mov ebp, esi ; for 'start app' function full path must be known |
75 | diamond | 101 | lodsb |
84 | diamond | 102 | test al, al |
103 | jnz @f |
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104 | mov esi, [esi] |
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105 | add esi, std_application_base_address |
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91 | diamond | 106 | mov ebp, esi |
84 | diamond | 107 | lodsb |
108 | @@: |
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237 | serge | 109 | cmp dword [ebx], 7 |
110 | jne @F |
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111 | mov edx, [ebx+4] |
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112 | mov ebx, [ebx+8] |
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113 | test ebx, ebx |
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114 | jz .l1 |
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115 | add ebx, new_app_base |
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116 | .l1: |
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117 | call fs_execute ; ebp, ebx, edx |
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118 | mov [esp+36], eax |
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119 | ret |
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120 | @@: |
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75 | diamond | 121 | cmp al, '/' |
122 | jz @f |
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71 | diamond | 123 | .notfound: |
75 | diamond | 124 | mov dword [esp+36], 5 ; file not found |
125 | ret |
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71 | diamond | 126 | @@: |
75 | diamond | 127 | cmp byte [esi], 0 |
128 | jz .rootdir |
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129 | mov edi, rootdirs-8 |
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130 | xor ecx, ecx |
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131 | push esi |
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71 | diamond | 132 | .scan1: |
75 | diamond | 133 | pop esi |
134 | add edi, ecx |
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135 | scasd |
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136 | scasd |
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137 | mov cl, byte [edi] |
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138 | jecxz .notfound |
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139 | inc edi |
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140 | push esi |
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71 | diamond | 141 | @@: |
75 | diamond | 142 | lodsb |
143 | or al, 20h |
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144 | scasb |
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145 | loopz @b |
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146 | jnz .scan1 |
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147 | lodsb |
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148 | cmp al, '/' |
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149 | jz .found1 |
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150 | test al, al |
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151 | jnz .scan1 |
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152 | pop eax |
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71 | diamond | 153 | ; directory /xxx |
154 | .maindir: |
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75 | diamond | 155 | cmp dword [ebx], 1 |
156 | jnz .access_denied |
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157 | xor eax, eax |
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158 | mov ebp, [ebx+12] |
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159 | mov edx, [ebx+16] |
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160 | add edx, std_application_base_address |
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78 | diamond | 161 | push dword [ebx+4] ; first block |
162 | mov ebx, [ebx+8] ; flags |
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75 | diamond | 163 | mov esi, [edi+4] |
78 | diamond | 164 | ; ebx=flags, [esp]=first block, ebp=number of blocks, edx=return area, esi='Next' handler |
75 | diamond | 165 | mov edi, edx |
166 | mov ecx, 32/4 |
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167 | rep stosd |
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168 | mov byte [edx], 1 ; version |
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169 | .maindir_loop: |
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170 | call esi |
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171 | jc .maindir_done |
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172 | inc dword [edx+8] |
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78 | diamond | 173 | dec dword [esp] |
75 | diamond | 174 | jns .maindir_loop |
175 | dec ebp |
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176 | js .maindir_loop |
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177 | inc dword [edx+4] |
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178 | mov dword [edi], 0x10 ; attributes: folder |
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179 | mov dword [edi+4], 1 ; name type: UNICODE |
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180 | push eax |
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181 | xor eax, eax |
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182 | add edi, 8 |
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183 | mov ecx, 40/4-2 |
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184 | rep stosd |
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185 | pop eax |
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186 | push eax edx |
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187 | ; convert number in eax to decimal UNICODE string |
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188 | push edi |
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189 | push -'0' |
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190 | mov cl, 10 |
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191 | @@: |
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192 | xor edx, edx |
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193 | div ecx |
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194 | push edx |
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195 | test eax, eax |
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196 | jnz @b |
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197 | @@: |
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198 | pop eax |
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199 | add al, '0' |
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78 | diamond | 200 | stosb |
201 | test bl, 1 ; UNICODE name? |
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202 | jz .ansi2 |
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203 | mov byte [edi], 0 |
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204 | inc edi |
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205 | .ansi2: |
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206 | test al, al |
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75 | diamond | 207 | jnz @b |
208 | mov byte [edi-1], 0 |
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209 | pop edi |
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78 | diamond | 210 | ; UNICODE name length is 520 bytes, ANSI - 264 |
75 | diamond | 211 | add edi, 520 |
78 | diamond | 212 | test bl, 1 |
213 | jnz @f |
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214 | sub edi, 520-264 |
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215 | @@: |
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75 | diamond | 216 | pop edx eax |
217 | jmp .maindir_loop |
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218 | .maindir_done: |
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78 | diamond | 219 | pop eax |
220 | mov ebx, [edx+4] |
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75 | diamond | 221 | xor eax, eax |
222 | dec ebp |
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223 | js @f |
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224 | mov al, ERROR_END_OF_FILE |
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225 | @@: |
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226 | mov [esp+36], eax |
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227 | mov [esp+24], ebx |
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228 | ret |
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71 | diamond | 229 | ; directory / |
230 | .rootdir: |
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75 | diamond | 231 | cmp dword [ebx], 1 ; read folder? |
232 | jz .readroot |
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233 | .access_denied: |
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234 | mov dword [esp+36], 10 ; access denied |
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235 | ret |
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71 | diamond | 236 | |
75 | diamond | 237 | .readroot: |
238 | ; virtual root folder - special handler |
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239 | mov esi, virtual_root_query |
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240 | mov ebp, [ebx+12] |
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241 | mov edx, [ebx+16] |
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242 | add edx, std_application_base_address |
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78 | diamond | 243 | push dword [ebx+4] ; first block |
244 | mov ebx, [ebx+8] ; flags |
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75 | diamond | 245 | xor eax, eax |
78 | diamond | 246 | ; eax=0, [esp]=first block, ebx=flags, ebp=number of blocks, edx=return area |
75 | diamond | 247 | mov edi, edx |
248 | mov ecx, 32/4 |
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249 | rep stosd |
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250 | mov byte [edx], 1 ; version |
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251 | .readroot_loop: |
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252 | cmp dword [esi], eax |
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253 | jz .readroot_done |
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254 | call dword [esi] |
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255 | add esi, 4 |
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256 | test eax, eax |
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257 | jnz @f |
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258 | .readroot_next: |
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259 | or ecx, -1 |
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260 | xchg esi, edi |
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78 | diamond | 261 | repnz scasb |
75 | diamond | 262 | xchg esi, edi |
263 | jmp .readroot_loop |
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264 | @@: |
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265 | xor eax, eax |
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266 | inc dword [edx+8] |
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78 | diamond | 267 | dec dword [esp] |
75 | diamond | 268 | jns .readroot_next |
269 | dec ebp |
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270 | js .readroot_next |
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271 | inc dword [edx+4] |
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272 | mov dword [edi], 0x10 ; attributes: folder |
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273 | mov dword [edi+4], 1 ; name type: UNICODE |
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274 | add edi, 8 |
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275 | mov ecx, 40/4-2 |
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276 | rep stosd |
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277 | push edi |
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278 | @@: |
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78 | diamond | 279 | lodsb |
280 | stosb |
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281 | test bl, 1 |
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282 | jz .ansi |
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283 | mov byte [edi], 0 |
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284 | inc edi |
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285 | .ansi: |
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75 | diamond | 286 | test eax, eax |
287 | jnz @b |
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288 | pop edi |
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289 | add edi, 520 |
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78 | diamond | 290 | test bl, 1 |
291 | jnz .readroot_loop |
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292 | sub edi, 520-264 |
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75 | diamond | 293 | jmp .readroot_loop |
294 | .readroot_done: |
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78 | diamond | 295 | pop eax |
296 | mov ebx, [edx+4] |
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75 | diamond | 297 | xor eax, eax |
298 | dec ebp |
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299 | js @f |
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300 | mov al, ERROR_END_OF_FILE |
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301 | @@: |
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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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305 | |||
71 | diamond | 306 | .found1: |
75 | diamond | 307 | pop eax |
308 | cmp byte [esi], 0 |
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309 | jz .maindir |
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71 | diamond | 310 | ; read partition number |
75 | diamond | 311 | xor ecx, ecx |
312 | xor eax, eax |
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71 | diamond | 313 | @@: |
75 | diamond | 314 | lodsb |
315 | cmp al, '/' |
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316 | jz .done1 |
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317 | test al, al |
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318 | jz .done1 |
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319 | sub al, '0' |
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320 | cmp al, 9 |
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321 | ja .notfound |
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322 | imul ecx, 10 |
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323 | add ecx, eax |
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324 | jmp @b |
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71 | diamond | 325 | .done1: |
75 | diamond | 326 | test ecx, ecx |
327 | jz .notfound |
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328 | test al, al |
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329 | jnz @f |
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330 | dec esi |
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71 | diamond | 331 | @@: |
75 | diamond | 332 | ; now [edi] contains handler address, ecx - partition number, |
333 | ; esi points to ASCIIZ string - rest of name |
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334 | jmp dword [edi] |
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71 | diamond | 335 | |
336 | ; handlers for devices |
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75 | diamond | 337 | ; in: ecx = 0 => query virtual directory /xxx |
71 | diamond | 338 | ; in: ecx = partition number |
339 | ; esi -> relative (for device) name |
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340 | ; ebx -> fileinfo |
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341 | ; out: [esp+36]=image of eax, [esp+24]=image of ebx |
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342 | |||
343 | fs_OnRamdisk: |
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75 | diamond | 344 | cmp ecx, 1 |
345 | jnz file_system_lfn.notfound |
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346 | mov eax, [ebx] |
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83 | diamond | 347 | cmp eax, fs_NumRamdiskServices |
348 | jae .not_impl |
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75 | diamond | 349 | mov ecx, [ebx+12] |
350 | mov edx, [ebx+16] |
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351 | add edx, std_application_base_address |
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352 | add ebx, 4 |
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353 | call dword [fs_RamdiskServices + eax*4] |
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354 | mov [esp+36], eax |
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355 | mov [esp+24], ebx |
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356 | ret |
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71 | diamond | 357 | .not_impl: |
75 | diamond | 358 | mov dword [esp+36], 2 ; not implemented |
359 | ret |
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71 | diamond | 360 | |
86 | diamond | 361 | fs_NotImplemented: |
362 | mov eax, 2 |
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363 | ret |
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364 | |||
71 | diamond | 365 | fs_RamdiskServices: |
75 | diamond | 366 | dd fs_RamdiskRead |
367 | dd fs_RamdiskReadFolder |
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83 | diamond | 368 | dd fs_RamdiskRewrite |
131 | diamond | 369 | dd fs_RamdiskWrite |
133 | diamond | 370 | dd fs_RamdiskSetFileEnd |
86 | diamond | 371 | dd fs_RamdiskGetFileInfo |
372 | dd fs_RamdiskSetFileInfo |
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321 | diamond | 373 | dd 0 ;fs_RamdiskExecute |
171 | diamond | 374 | dd fs_RamdiskDelete |
321 | diamond | 375 | dd fs_RamdiskCreateFolder |
83 | diamond | 376 | fs_NumRamdiskServices = ($ - fs_RamdiskServices)/4 |
71 | diamond | 377 | |
378 | fs_OnFloppy: |
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75 | diamond | 379 | cmp ecx, 2 |
380 | ja file_system_lfn.notfound |
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381 | mov eax, [ebx] |
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83 | diamond | 382 | cmp eax, fs_NumFloppyServices |
383 | jae fs_OnRamdisk.not_impl |
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75 | diamond | 384 | call reserve_flp |
385 | mov [flp_number], cl |
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386 | mov ecx, [ebx+12] |
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387 | mov edx, [ebx+16] |
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388 | add edx, std_application_base_address |
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389 | add ebx, 4 |
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390 | call dword [fs_FloppyServices + eax*4] |
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391 | and [flp_status], 0 |
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392 | mov [esp+36], eax |
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393 | mov [esp+24], ebx |
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394 | ret |
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71 | diamond | 395 | |
396 | fs_FloppyServices: |
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75 | diamond | 397 | dd fs_FloppyRead |
398 | dd fs_FloppyReadFolder |
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83 | diamond | 399 | dd fs_FloppyRewrite |
131 | diamond | 400 | dd fs_FloppyWrite |
133 | diamond | 401 | dd fs_FloppySetFileEnd |
86 | diamond | 402 | dd fs_FloppyGetFileInfo |
403 | dd fs_FloppySetFileInfo |
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321 | diamond | 404 | dd 0 ;fs_FloppyExecute |
171 | diamond | 405 | dd fs_FloppyDelete |
321 | diamond | 406 | dd fs_FloppyCreateFolder |
83 | diamond | 407 | fs_NumFloppyServices = ($ - fs_FloppyServices)/4 |
71 | diamond | 408 | |
409 | fs_OnHd0: |
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75 | diamond | 410 | call reserve_hd1 |
411 | mov [hdbase], 0x1F0 |
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412 | mov [hdid], 0 |
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413 | push 1 |
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414 | jmp fs_OnHd |
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71 | diamond | 415 | fs_OnHd1: |
75 | diamond | 416 | call reserve_hd1 |
417 | mov [hdbase], 0x1F0 |
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418 | mov [hdid], 0x10 |
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419 | push 2 |
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420 | jmp fs_OnHd |
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71 | diamond | 421 | fs_OnHd2: |
75 | diamond | 422 | call reserve_hd1 |
423 | mov [hdbase], 0x170 |
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424 | mov [hdid], 0 |
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425 | push 3 |
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426 | jmp fs_OnHd |
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71 | diamond | 427 | fs_OnHd3: |
75 | diamond | 428 | call reserve_hd1 |
429 | mov [hdbase], 0x170 |
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430 | mov [hdid], 0x10 |
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431 | push 4 |
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71 | diamond | 432 | fs_OnHd: |
95 | mario79 | 433 | call reserve_hd_channel |
75 | diamond | 434 | pop eax |
435 | mov [hdpos], eax |
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436 | cmp ecx, 0x100 |
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437 | jae .nf |
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422 | serge | 438 | cmp cl, [DRIVE_DATA+1+eax] |
75 | diamond | 439 | jbe @f |
440 | .nf: |
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95 | mario79 | 441 | call free_hd_channel |
75 | diamond | 442 | and [hd1_status], 0 |
443 | mov dword [esp+36], 5 ; not found |
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444 | ret |
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71 | diamond | 445 | @@: |
75 | diamond | 446 | mov [fat32part], ecx |
447 | push ebx esi |
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448 | call choice_necessity_partition_1 |
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449 | pop esi ebx |
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450 | mov ecx, [ebx+12] |
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451 | mov edx, [ebx+16] |
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452 | add edx, std_application_base_address |
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453 | mov eax, [ebx] |
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83 | diamond | 454 | cmp eax, fs_NumHdServices |
455 | jae .not_impl |
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75 | diamond | 456 | add ebx, 4 |
457 | call dword [fs_HdServices + eax*4] |
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95 | mario79 | 458 | call free_hd_channel |
75 | diamond | 459 | and [hd1_status], 0 |
460 | mov [esp+36], eax |
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461 | mov [esp+24], ebx |
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462 | ret |
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463 | .not_impl: |
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95 | mario79 | 464 | call free_hd_channel |
75 | diamond | 465 | and [hd1_status], 0 |
466 | mov dword [esp+36], 2 ; not implemented |
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467 | ret |
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71 | diamond | 468 | |
469 | fs_HdServices: |
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75 | diamond | 470 | dd fs_HdRead |
471 | dd fs_HdReadFolder |
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83 | diamond | 472 | dd fs_HdRewrite |
131 | diamond | 473 | dd fs_HdWrite |
133 | diamond | 474 | dd fs_HdSetFileEnd |
86 | diamond | 475 | dd fs_HdGetFileInfo |
476 | dd fs_HdSetFileInfo |
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256 | diamond | 477 | dd 0 ;fs_HdExecute |
171 | diamond | 478 | dd fs_HdDelete |
321 | diamond | 479 | dd fs_HdCreateFolder |
83 | diamond | 480 | fs_NumHdServices = ($ - fs_HdServices)/4 |
75 | diamond | 481 | |
87 | mario79 | 482 | ;******************************************************* |
483 | fs_OnCd0: |
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484 | call reserve_cd |
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485 | mov [ChannelNumber],1 |
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486 | mov [DiskNumber],0 |
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487 | push 6 |
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488 | jmp fs_OnCd |
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489 | fs_OnCd1: |
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490 | call reserve_cd |
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491 | mov [ChannelNumber],1 |
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492 | mov [DiskNumber],1 |
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493 | push 4 |
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494 | jmp fs_OnCd |
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495 | fs_OnCd2: |
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496 | call reserve_cd |
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497 | mov [ChannelNumber],2 |
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498 | mov [DiskNumber],0 |
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499 | push 2 |
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500 | jmp fs_OnCd |
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501 | fs_OnCd3: |
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502 | call reserve_cd |
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503 | mov [ChannelNumber],2 |
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504 | mov [DiskNumber],1 |
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505 | push 0 |
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506 | fs_OnCd: |
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95 | mario79 | 507 | call reserve_cd_channel |
87 | mario79 | 508 | pop eax |
509 | mov [hdpos], eax |
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510 | cmp ecx, 0x100 |
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511 | jae .nf |
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133 | diamond | 512 | push ecx ebx |
87 | mario79 | 513 | mov cl,al |
389 | serge | 514 | mov bl,[DRIVE_DATA+1] |
87 | mario79 | 515 | shr bl,cl |
516 | test bl,2 |
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133 | diamond | 517 | pop ebx ecx |
87 | mario79 | 518 | |
519 | jnz @f |
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520 | .nf: |
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95 | mario79 | 521 | call free_cd_channel |
87 | mario79 | 522 | and [cd_status], 0 |
523 | mov dword [esp+36], 5 ; not found |
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524 | ret |
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525 | @@: |
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526 | mov ecx, [ebx+12] |
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527 | mov edx, [ebx+16] |
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528 | add edx, std_application_base_address |
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529 | mov eax, [ebx] |
||
90 | mario79 | 530 | cmp eax,fs_NumCdServices |
531 | jae .not_impl |
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87 | mario79 | 532 | add ebx, 4 |
533 | call dword [fs_CdServices + eax*4] |
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95 | mario79 | 534 | call free_cd_channel |
87 | mario79 | 535 | and [cd_status], 0 |
536 | mov [esp+36], eax |
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537 | mov [esp+24], ebx |
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538 | ret |
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539 | .not_impl: |
||
95 | mario79 | 540 | call free_cd_channel |
89 | diamond | 541 | and [cd_status], 0 |
87 | mario79 | 542 | mov dword [esp+36], 2 ; not implemented |
543 | ret |
||
544 | |||
545 | fs_CdServices: |
||
546 | dd fs_CdRead |
||
547 | dd fs_CdReadFolder |
||
90 | mario79 | 548 | dd fs_NotImplemented |
549 | dd fs_NotImplemented |
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550 | dd fs_NotImplemented |
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551 | dd fs_CdGetFileInfo |
||
552 | dd fs_NotImplemented |
||
94 | mario79 | 553 | dd fs_CdExecute |
90 | mario79 | 554 | fs_NumCdServices = ($ - fs_CdServices)/4 |
555 | |||
87 | mario79 | 556 | ;******************************************************* |
557 | |||
75 | diamond | 558 | fs_HasRamdisk: |
559 | mov al, 1 ; we always have ramdisk |
||
560 | ret |
||
561 | |||
562 | fs_HasFloppy: |
||
381 | serge | 563 | cmp byte [DRIVE_DATA], 0 |
75 | diamond | 564 | setnz al |
565 | ret |
||
566 | |||
567 | fs_HasHd0: |
||
381 | serge | 568 | mov al, [DRIVE_DATA+1] |
75 | diamond | 569 | and al, 11000000b |
570 | cmp al, 01000000b |
||
571 | setz al |
||
572 | ret |
||
573 | fs_HasHd1: |
||
381 | serge | 574 | mov al, [DRIVE_DATA+1] |
75 | diamond | 575 | and al, 00110000b |
576 | cmp al, 00010000b |
||
577 | setz al |
||
578 | ret |
||
579 | fs_HasHd2: |
||
381 | serge | 580 | mov al, [DRIVE_DATA+1] |
75 | diamond | 581 | and al, 00001100b |
582 | cmp al, 00000100b |
||
583 | setz al |
||
584 | ret |
||
585 | fs_HasHd3: |
||
381 | serge | 586 | mov al, [DRIVE_DATA+1] |
75 | diamond | 587 | and al, 00000011b |
588 | cmp al, 00000001b |
||
589 | setz al |
||
590 | ret |
||
591 | |||
87 | mario79 | 592 | ;******************************************************* |
593 | fs_HasCd0: |
||
381 | serge | 594 | mov al, [DRIVE_DATA+1] |
87 | mario79 | 595 | and al, 11000000b |
596 | cmp al, 10000000b |
||
597 | setz al |
||
598 | ret |
||
599 | fs_HasCd1: |
||
381 | serge | 600 | mov al, [DRIVE_DATA+1] |
87 | mario79 | 601 | and al, 00110000b |
602 | cmp al, 00100000b |
||
603 | setz al |
||
604 | ret |
||
605 | fs_HasCd2: |
||
381 | serge | 606 | mov al, [DRIVE_DATA+1] |
87 | mario79 | 607 | and al, 00001100b |
608 | cmp al, 00001000b |
||
609 | setz al |
||
610 | ret |
||
611 | fs_HasCd3: |
||
381 | serge | 612 | mov al, [DRIVE_DATA+1] |
87 | mario79 | 613 | and al, 00000011b |
614 | cmp al, 00000010b |
||
615 | setz al |
||
616 | ret |
||
237 | serge | 617 | ;******************************************************* |
87 | mario79 | 618 | |
75 | diamond | 619 | ; fs_NextXXX functions: |
620 | ; in: eax = partition number, from which start to scan |
||
621 | ; out: CF=1 => no more partitions |
||
622 | ; CF=0 => eax=next partition number |
||
623 | |||
624 | fs_NextRamdisk: |
||
625 | ; we always have /rd/1 |
||
626 | test eax, eax |
||
627 | stc |
||
628 | jnz @f |
||
629 | mov al, 1 |
||
630 | clc |
||
631 | @@: |
||
632 | ret |
||
633 | |||
634 | fs_NextFloppy: |
||
381 | serge | 635 | ; we have /fd/1 iff (([DRIVE_DATA] and 0xF0) != 0) and /fd/2 iff (([DRIVE_DATA] and 0x0F) != 0) |
636 | test byte [DRIVE_DATA], 0xF0 |
||
75 | diamond | 637 | jz .no1 |
638 | test eax, eax |
||
639 | jnz .no1 |
||
640 | inc eax |
||
641 | ret ; CF cleared |
||
642 | .no1: |
||
381 | serge | 643 | test byte [DRIVE_DATA], 0x0F |
75 | diamond | 644 | jz .no2 |
645 | cmp al, 2 |
||
646 | jae .no2 |
||
647 | mov al, 2 |
||
648 | clc |
||
649 | ret |
||
650 | .no2: |
||
651 | stc |
||
652 | ret |
||
653 | |||
654 | ; on hdx, we have partitions from 1 to [0x40002+x] |
||
655 | fs_NextHd0: |
||
656 | push 0 |
||
657 | jmp fs_NextHd |
||
658 | fs_NextHd1: |
||
659 | push 1 |
||
660 | jmp fs_NextHd |
||
661 | fs_NextHd2: |
||
662 | push 2 |
||
663 | jmp fs_NextHd |
||
664 | fs_NextHd3: |
||
665 | push 3 |
||
666 | fs_NextHd: |
||
667 | pop ecx |
||
381 | serge | 668 | movzx ecx, byte [DRIVE_DATA+2+ecx] |
75 | diamond | 669 | cmp eax, ecx |
670 | jae fs_NextFloppy.no2 |
||
671 | inc eax |
||
672 | clc |
||
673 | ret |
||
237 | serge | 674 | |
87 | mario79 | 675 | ;******************************************************* |
676 | fs_NextCd: |
||
677 | ; we always have /cdX/1 |
||
678 | test eax, eax |
||
679 | stc |
||
680 | jnz @f |
||
681 | mov al, 1 |
||
682 | clc |
||
683 | @@: |
||
684 | ret |
||
685 | ;******************************************************* |
||
686 |