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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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87 | mario79 | 31 | ;********************************************** |
32 | db 3,'cd0' |
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33 | dd fs_OnCd0 |
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34 | dd fs_NextCd |
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35 | db 3,'cd1' |
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36 | dd fs_OnCd1 |
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37 | dd fs_NextCd |
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38 | db 3,'cd2' |
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39 | dd fs_OnCd2 |
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40 | dd fs_NextCd |
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41 | db 3,'cd3' |
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42 | dd fs_OnCd3 |
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43 | dd fs_NextCd |
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237 | serge | 44 | ;*********************************************** |
75 | diamond | 45 | db 0 |
46 | |||
87 | mario79 | 47 | |
75 | diamond | 48 | virtual_root_query: |
49 | dd fs_HasRamdisk |
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78 | diamond | 50 | db 'rd',0 |
75 | diamond | 51 | dd fs_HasFloppy |
78 | diamond | 52 | db 'fd',0 |
75 | diamond | 53 | dd fs_HasHd0 |
78 | diamond | 54 | db 'hd0',0 |
75 | diamond | 55 | dd fs_HasHd1 |
78 | diamond | 56 | db 'hd1',0 |
75 | diamond | 57 | dd fs_HasHd2 |
78 | diamond | 58 | db 'hd2',0 |
75 | diamond | 59 | dd fs_HasHd3 |
78 | diamond | 60 | db 'hd3',0 |
87 | mario79 | 61 | ;********************************************** |
62 | dd fs_HasCd0 |
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63 | db 'cd0',0 |
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64 | dd fs_HasCd1 |
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65 | db 'cd1',0 |
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66 | dd fs_HasCd2 |
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67 | db 'cd2',0 |
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68 | dd fs_HasCd3 |
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69 | db 'cd3',0 |
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70 | ;********************************************** |
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75 | diamond | 71 | dd 0 |
71 | diamond | 72 | endg |
73 | |||
74 | file_system_lfn: |
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75 | ; in: eax->fileinfo block |
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76 | ; operation codes: |
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72 | diamond | 77 | ; 0 : read file |
75 | diamond | 78 | ; 1 : read folder |
83 | diamond | 79 | ; 2 : create/rewrite file |
133 | diamond | 80 | ; 3 : write/append to file |
81 | ; 4 : set end of file |
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86 | diamond | 82 | ; 5 : get file/directory attributes structure |
83 | ; 6 : set file/directory attributes structure |
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91 | diamond | 84 | ; 7 : start application |
171 | diamond | 85 | ; 8 : delete file |
321 | diamond | 86 | ; 9 : create directory |
71 | diamond | 87 | |
419 | serge | 88 | ; add eax, std_application_base_address |
71 | diamond | 89 | ; parse file name |
75 | diamond | 90 | xchg ebx, eax |
91 | lea esi, [ebx+20] |
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91 | diamond | 92 | mov ebp, esi ; for 'start app' function full path must be known |
75 | diamond | 93 | lodsb |
84 | diamond | 94 | test al, al |
95 | jnz @f |
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96 | mov esi, [esi] |
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419 | serge | 97 | ; add esi, std_application_base_address |
91 | diamond | 98 | mov ebp, esi |
84 | diamond | 99 | lodsb |
100 | @@: |
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237 | serge | 101 | cmp dword [ebx], 7 |
102 | jne @F |
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103 | mov edx, [ebx+4] |
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104 | mov ebx, [ebx+8] |
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105 | test ebx, ebx |
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106 | jz .l1 |
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419 | serge | 107 | ; add ebx, new_app_base |
237 | serge | 108 | .l1: |
109 | call fs_execute ; ebp, ebx, edx |
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110 | mov [esp+36], eax |
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111 | ret |
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112 | @@: |
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75 | diamond | 113 | cmp al, '/' |
114 | jz @f |
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71 | diamond | 115 | .notfound: |
75 | diamond | 116 | mov dword [esp+36], 5 ; file not found |
117 | ret |
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71 | diamond | 118 | @@: |
75 | diamond | 119 | cmp byte [esi], 0 |
120 | jz .rootdir |
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121 | mov edi, rootdirs-8 |
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122 | xor ecx, ecx |
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123 | push esi |
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71 | diamond | 124 | .scan1: |
75 | diamond | 125 | pop esi |
126 | add edi, ecx |
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127 | scasd |
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128 | scasd |
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129 | mov cl, byte [edi] |
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130 | jecxz .notfound |
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131 | inc edi |
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132 | push esi |
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71 | diamond | 133 | @@: |
75 | diamond | 134 | lodsb |
135 | or al, 20h |
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136 | scasb |
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137 | loopz @b |
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138 | jnz .scan1 |
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139 | lodsb |
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140 | cmp al, '/' |
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141 | jz .found1 |
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142 | test al, al |
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143 | jnz .scan1 |
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144 | pop eax |
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71 | diamond | 145 | ; directory /xxx |
146 | .maindir: |
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75 | diamond | 147 | cmp dword [ebx], 1 |
148 | jnz .access_denied |
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149 | xor eax, eax |
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150 | mov ebp, [ebx+12] |
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151 | mov edx, [ebx+16] |
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419 | serge | 152 | ; add edx, std_application_base_address |
78 | diamond | 153 | push dword [ebx+4] ; first block |
154 | mov ebx, [ebx+8] ; flags |
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75 | diamond | 155 | mov esi, [edi+4] |
78 | diamond | 156 | ; ebx=flags, [esp]=first block, ebp=number of blocks, edx=return area, esi='Next' handler |
75 | diamond | 157 | mov edi, edx |
158 | mov ecx, 32/4 |
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159 | rep stosd |
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160 | mov byte [edx], 1 ; version |
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161 | .maindir_loop: |
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162 | call esi |
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163 | jc .maindir_done |
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164 | inc dword [edx+8] |
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78 | diamond | 165 | dec dword [esp] |
75 | diamond | 166 | jns .maindir_loop |
167 | dec ebp |
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168 | js .maindir_loop |
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169 | inc dword [edx+4] |
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170 | mov dword [edi], 0x10 ; attributes: folder |
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171 | mov dword [edi+4], 1 ; name type: UNICODE |
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172 | push eax |
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173 | xor eax, eax |
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174 | add edi, 8 |
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175 | mov ecx, 40/4-2 |
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176 | rep stosd |
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177 | pop eax |
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178 | push eax edx |
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179 | ; convert number in eax to decimal UNICODE string |
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180 | push edi |
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181 | push -'0' |
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182 | mov cl, 10 |
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183 | @@: |
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184 | xor edx, edx |
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185 | div ecx |
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186 | push edx |
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187 | test eax, eax |
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188 | jnz @b |
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189 | @@: |
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190 | pop eax |
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191 | add al, '0' |
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78 | diamond | 192 | stosb |
193 | test bl, 1 ; UNICODE name? |
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194 | jz .ansi2 |
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195 | mov byte [edi], 0 |
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196 | inc edi |
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197 | .ansi2: |
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198 | test al, al |
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75 | diamond | 199 | jnz @b |
200 | mov byte [edi-1], 0 |
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201 | pop edi |
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78 | diamond | 202 | ; UNICODE name length is 520 bytes, ANSI - 264 |
75 | diamond | 203 | add edi, 520 |
78 | diamond | 204 | test bl, 1 |
205 | jnz @f |
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206 | sub edi, 520-264 |
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207 | @@: |
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75 | diamond | 208 | pop edx eax |
209 | jmp .maindir_loop |
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210 | .maindir_done: |
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78 | diamond | 211 | pop eax |
212 | mov ebx, [edx+4] |
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75 | diamond | 213 | xor eax, eax |
214 | dec ebp |
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215 | js @f |
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216 | mov al, ERROR_END_OF_FILE |
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217 | @@: |
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218 | mov [esp+36], eax |
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219 | mov [esp+24], ebx |
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220 | ret |
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71 | diamond | 221 | ; directory / |
222 | .rootdir: |
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75 | diamond | 223 | cmp dword [ebx], 1 ; read folder? |
224 | jz .readroot |
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225 | .access_denied: |
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226 | mov dword [esp+36], 10 ; access denied |
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227 | ret |
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71 | diamond | 228 | |
75 | diamond | 229 | .readroot: |
230 | ; virtual root folder - special handler |
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231 | mov esi, virtual_root_query |
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232 | mov ebp, [ebx+12] |
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233 | mov edx, [ebx+16] |
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419 | serge | 234 | ; add edx, std_application_base_address |
78 | diamond | 235 | push dword [ebx+4] ; first block |
236 | mov ebx, [ebx+8] ; flags |
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75 | diamond | 237 | xor eax, eax |
78 | diamond | 238 | ; eax=0, [esp]=first block, ebx=flags, ebp=number of blocks, edx=return area |
75 | diamond | 239 | mov edi, edx |
240 | mov ecx, 32/4 |
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241 | rep stosd |
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242 | mov byte [edx], 1 ; version |
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243 | .readroot_loop: |
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244 | cmp dword [esi], eax |
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245 | jz .readroot_done |
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246 | call dword [esi] |
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247 | add esi, 4 |
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248 | test eax, eax |
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249 | jnz @f |
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250 | .readroot_next: |
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251 | or ecx, -1 |
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252 | xchg esi, edi |
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78 | diamond | 253 | repnz scasb |
75 | diamond | 254 | xchg esi, edi |
255 | jmp .readroot_loop |
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256 | @@: |
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257 | xor eax, eax |
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258 | inc dword [edx+8] |
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78 | diamond | 259 | dec dword [esp] |
75 | diamond | 260 | jns .readroot_next |
261 | dec ebp |
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262 | js .readroot_next |
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263 | inc dword [edx+4] |
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264 | mov dword [edi], 0x10 ; attributes: folder |
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265 | mov dword [edi+4], 1 ; name type: UNICODE |
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266 | add edi, 8 |
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267 | mov ecx, 40/4-2 |
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268 | rep stosd |
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269 | push edi |
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270 | @@: |
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78 | diamond | 271 | lodsb |
272 | stosb |
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273 | test bl, 1 |
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274 | jz .ansi |
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275 | mov byte [edi], 0 |
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276 | inc edi |
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277 | .ansi: |
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75 | diamond | 278 | test eax, eax |
279 | jnz @b |
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280 | pop edi |
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281 | add edi, 520 |
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78 | diamond | 282 | test bl, 1 |
283 | jnz .readroot_loop |
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284 | sub edi, 520-264 |
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75 | diamond | 285 | jmp .readroot_loop |
286 | .readroot_done: |
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78 | diamond | 287 | pop eax |
288 | mov ebx, [edx+4] |
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75 | diamond | 289 | xor eax, eax |
290 | dec ebp |
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291 | js @f |
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292 | mov al, ERROR_END_OF_FILE |
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293 | @@: |
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294 | mov [esp+36], eax |
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295 | mov [esp+24], ebx |
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296 | ret |
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297 | |||
71 | diamond | 298 | .found1: |
75 | diamond | 299 | pop eax |
300 | cmp byte [esi], 0 |
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301 | jz .maindir |
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71 | diamond | 302 | ; read partition number |
75 | diamond | 303 | xor ecx, ecx |
304 | xor eax, eax |
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71 | diamond | 305 | @@: |
75 | diamond | 306 | lodsb |
307 | cmp al, '/' |
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308 | jz .done1 |
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309 | test al, al |
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310 | jz .done1 |
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311 | sub al, '0' |
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312 | cmp al, 9 |
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313 | ja .notfound |
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314 | imul ecx, 10 |
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315 | add ecx, eax |
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316 | jmp @b |
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71 | diamond | 317 | .done1: |
75 | diamond | 318 | test ecx, ecx |
319 | jz .notfound |
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320 | test al, al |
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321 | jnz @f |
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322 | dec esi |
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71 | diamond | 323 | @@: |
75 | diamond | 324 | ; now [edi] contains handler address, ecx - partition number, |
325 | ; esi points to ASCIIZ string - rest of name |
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326 | jmp dword [edi] |
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71 | diamond | 327 | |
328 | ; handlers for devices |
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75 | diamond | 329 | ; in: ecx = 0 => query virtual directory /xxx |
71 | diamond | 330 | ; in: ecx = partition number |
331 | ; esi -> relative (for device) name |
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332 | ; ebx -> fileinfo |
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333 | ; out: [esp+36]=image of eax, [esp+24]=image of ebx |
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334 | |||
335 | fs_OnRamdisk: |
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75 | diamond | 336 | cmp ecx, 1 |
337 | jnz file_system_lfn.notfound |
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338 | mov eax, [ebx] |
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83 | diamond | 339 | cmp eax, fs_NumRamdiskServices |
340 | jae .not_impl |
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75 | diamond | 341 | mov ecx, [ebx+12] |
342 | mov edx, [ebx+16] |
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419 | serge | 343 | ; add edx, std_application_base_address |
75 | diamond | 344 | add ebx, 4 |
345 | call dword [fs_RamdiskServices + eax*4] |
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346 | mov [esp+36], eax |
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347 | mov [esp+24], ebx |
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348 | ret |
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71 | diamond | 349 | .not_impl: |
75 | diamond | 350 | mov dword [esp+36], 2 ; not implemented |
351 | ret |
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71 | diamond | 352 | |
86 | diamond | 353 | fs_NotImplemented: |
354 | mov eax, 2 |
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355 | ret |
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356 | |||
71 | diamond | 357 | fs_RamdiskServices: |
75 | diamond | 358 | dd fs_RamdiskRead |
359 | dd fs_RamdiskReadFolder |
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83 | diamond | 360 | dd fs_RamdiskRewrite |
131 | diamond | 361 | dd fs_RamdiskWrite |
133 | diamond | 362 | dd fs_RamdiskSetFileEnd |
86 | diamond | 363 | dd fs_RamdiskGetFileInfo |
364 | dd fs_RamdiskSetFileInfo |
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321 | diamond | 365 | dd 0 ;fs_RamdiskExecute |
171 | diamond | 366 | dd fs_RamdiskDelete |
321 | diamond | 367 | dd fs_RamdiskCreateFolder |
83 | diamond | 368 | fs_NumRamdiskServices = ($ - fs_RamdiskServices)/4 |
71 | diamond | 369 | |
370 | fs_OnFloppy: |
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75 | diamond | 371 | cmp ecx, 2 |
372 | ja file_system_lfn.notfound |
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373 | mov eax, [ebx] |
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83 | diamond | 374 | cmp eax, fs_NumFloppyServices |
375 | jae fs_OnRamdisk.not_impl |
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75 | diamond | 376 | call reserve_flp |
377 | mov [flp_number], cl |
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378 | mov ecx, [ebx+12] |
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379 | mov edx, [ebx+16] |
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419 | serge | 380 | ; add edx, std_application_base_address |
75 | diamond | 381 | add ebx, 4 |
382 | call dword [fs_FloppyServices + eax*4] |
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383 | and [flp_status], 0 |
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384 | mov [esp+36], eax |
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385 | mov [esp+24], ebx |
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386 | ret |
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71 | diamond | 387 | |
388 | fs_FloppyServices: |
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75 | diamond | 389 | dd fs_FloppyRead |
390 | dd fs_FloppyReadFolder |
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83 | diamond | 391 | dd fs_FloppyRewrite |
131 | diamond | 392 | dd fs_FloppyWrite |
133 | diamond | 393 | dd fs_FloppySetFileEnd |
86 | diamond | 394 | dd fs_FloppyGetFileInfo |
395 | dd fs_FloppySetFileInfo |
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321 | diamond | 396 | dd 0 ;fs_FloppyExecute |
171 | diamond | 397 | dd fs_FloppyDelete |
321 | diamond | 398 | dd fs_FloppyCreateFolder |
83 | diamond | 399 | fs_NumFloppyServices = ($ - fs_FloppyServices)/4 |
71 | diamond | 400 | |
401 | fs_OnHd0: |
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75 | diamond | 402 | call reserve_hd1 |
403 | mov [hdbase], 0x1F0 |
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404 | mov [hdid], 0 |
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405 | push 1 |
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406 | jmp fs_OnHd |
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71 | diamond | 407 | fs_OnHd1: |
75 | diamond | 408 | call reserve_hd1 |
409 | mov [hdbase], 0x1F0 |
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410 | mov [hdid], 0x10 |
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411 | push 2 |
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412 | jmp fs_OnHd |
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71 | diamond | 413 | fs_OnHd2: |
75 | diamond | 414 | call reserve_hd1 |
415 | mov [hdbase], 0x170 |
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416 | mov [hdid], 0 |
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417 | push 3 |
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418 | jmp fs_OnHd |
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71 | diamond | 419 | fs_OnHd3: |
75 | diamond | 420 | call reserve_hd1 |
421 | mov [hdbase], 0x170 |
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422 | mov [hdid], 0x10 |
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423 | push 4 |
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71 | diamond | 424 | fs_OnHd: |
95 | mario79 | 425 | call reserve_hd_channel |
75 | diamond | 426 | pop eax |
427 | mov [hdpos], eax |
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428 | cmp ecx, 0x100 |
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429 | jae .nf |
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388 | serge | 430 | cmp cl, [DRIVE_DATA+eax] |
75 | diamond | 431 | jbe @f |
432 | .nf: |
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95 | mario79 | 433 | call free_hd_channel |
75 | diamond | 434 | and [hd1_status], 0 |
435 | mov dword [esp+36], 5 ; not found |
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436 | ret |
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71 | diamond | 437 | @@: |
75 | diamond | 438 | mov [fat32part], ecx |
439 | push ebx esi |
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440 | call choice_necessity_partition_1 |
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441 | pop esi ebx |
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442 | mov ecx, [ebx+12] |
||
443 | mov edx, [ebx+16] |
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419 | serge | 444 | ; add edx, std_application_base_address |
75 | diamond | 445 | mov eax, [ebx] |
83 | diamond | 446 | cmp eax, fs_NumHdServices |
447 | jae .not_impl |
||
75 | diamond | 448 | add ebx, 4 |
449 | call dword [fs_HdServices + eax*4] |
||
95 | mario79 | 450 | call free_hd_channel |
75 | diamond | 451 | and [hd1_status], 0 |
452 | mov [esp+36], eax |
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453 | mov [esp+24], ebx |
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454 | ret |
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455 | .not_impl: |
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95 | mario79 | 456 | call free_hd_channel |
75 | diamond | 457 | and [hd1_status], 0 |
458 | mov dword [esp+36], 2 ; not implemented |
||
459 | ret |
||
71 | diamond | 460 | |
461 | fs_HdServices: |
||
75 | diamond | 462 | dd fs_HdRead |
463 | dd fs_HdReadFolder |
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83 | diamond | 464 | dd fs_HdRewrite |
131 | diamond | 465 | dd fs_HdWrite |
133 | diamond | 466 | dd fs_HdSetFileEnd |
86 | diamond | 467 | dd fs_HdGetFileInfo |
468 | dd fs_HdSetFileInfo |
||
256 | diamond | 469 | dd 0 ;fs_HdExecute |
171 | diamond | 470 | dd fs_HdDelete |
321 | diamond | 471 | dd fs_HdCreateFolder |
83 | diamond | 472 | fs_NumHdServices = ($ - fs_HdServices)/4 |
75 | diamond | 473 | |
87 | mario79 | 474 | ;******************************************************* |
475 | fs_OnCd0: |
||
476 | call reserve_cd |
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477 | mov [ChannelNumber],1 |
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478 | mov [DiskNumber],0 |
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479 | push 6 |
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480 | jmp fs_OnCd |
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481 | fs_OnCd1: |
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482 | call reserve_cd |
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483 | mov [ChannelNumber],1 |
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484 | mov [DiskNumber],1 |
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485 | push 4 |
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486 | jmp fs_OnCd |
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487 | fs_OnCd2: |
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488 | call reserve_cd |
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489 | mov [ChannelNumber],2 |
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490 | mov [DiskNumber],0 |
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491 | push 2 |
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492 | jmp fs_OnCd |
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493 | fs_OnCd3: |
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494 | call reserve_cd |
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495 | mov [ChannelNumber],2 |
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496 | mov [DiskNumber],1 |
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497 | push 0 |
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498 | fs_OnCd: |
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95 | mario79 | 499 | call reserve_cd_channel |
87 | mario79 | 500 | pop eax |
501 | mov [hdpos], eax |
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502 | cmp ecx, 0x100 |
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503 | jae .nf |
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133 | diamond | 504 | push ecx ebx |
87 | mario79 | 505 | mov cl,al |
388 | serge | 506 | mov bl,[DRIVE_DATA+1] |
87 | mario79 | 507 | shr bl,cl |
508 | test bl,2 |
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133 | diamond | 509 | pop ebx ecx |
87 | mario79 | 510 | |
511 | jnz @f |
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512 | .nf: |
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95 | mario79 | 513 | call free_cd_channel |
87 | mario79 | 514 | and [cd_status], 0 |
515 | mov dword [esp+36], 5 ; not found |
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516 | ret |
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517 | @@: |
||
518 | mov ecx, [ebx+12] |
||
519 | mov edx, [ebx+16] |
||
419 | serge | 520 | ; add edx, std_application_base_address |
87 | mario79 | 521 | mov eax, [ebx] |
90 | mario79 | 522 | cmp eax,fs_NumCdServices |
523 | jae .not_impl |
||
87 | mario79 | 524 | add ebx, 4 |
525 | call dword [fs_CdServices + eax*4] |
||
95 | mario79 | 526 | call free_cd_channel |
87 | mario79 | 527 | and [cd_status], 0 |
528 | mov [esp+36], eax |
||
529 | mov [esp+24], ebx |
||
530 | ret |
||
531 | .not_impl: |
||
95 | mario79 | 532 | call free_cd_channel |
89 | diamond | 533 | and [cd_status], 0 |
87 | mario79 | 534 | mov dword [esp+36], 2 ; not implemented |
535 | ret |
||
536 | |||
537 | fs_CdServices: |
||
538 | dd fs_CdRead |
||
539 | dd fs_CdReadFolder |
||
90 | mario79 | 540 | dd fs_NotImplemented |
541 | dd fs_NotImplemented |
||
542 | dd fs_NotImplemented |
||
543 | dd fs_CdGetFileInfo |
||
544 | dd fs_NotImplemented |
||
94 | mario79 | 545 | dd fs_CdExecute |
90 | mario79 | 546 | fs_NumCdServices = ($ - fs_CdServices)/4 |
547 | |||
87 | mario79 | 548 | ;******************************************************* |
549 | |||
75 | diamond | 550 | fs_HasRamdisk: |
551 | mov al, 1 ; we always have ramdisk |
||
552 | ret |
||
553 | |||
554 | fs_HasFloppy: |
||
381 | serge | 555 | cmp byte [DRIVE_DATA], 0 |
75 | diamond | 556 | setnz al |
557 | ret |
||
558 | |||
559 | fs_HasHd0: |
||
381 | serge | 560 | mov al, [DRIVE_DATA+1] |
75 | diamond | 561 | and al, 11000000b |
562 | cmp al, 01000000b |
||
563 | setz al |
||
564 | ret |
||
565 | fs_HasHd1: |
||
381 | serge | 566 | mov al, [DRIVE_DATA+1] |
75 | diamond | 567 | and al, 00110000b |
568 | cmp al, 00010000b |
||
569 | setz al |
||
570 | ret |
||
571 | fs_HasHd2: |
||
381 | serge | 572 | mov al, [DRIVE_DATA+1] |
75 | diamond | 573 | and al, 00001100b |
574 | cmp al, 00000100b |
||
575 | setz al |
||
576 | ret |
||
577 | fs_HasHd3: |
||
381 | serge | 578 | mov al, [DRIVE_DATA+1] |
75 | diamond | 579 | and al, 00000011b |
580 | cmp al, 00000001b |
||
581 | setz al |
||
582 | ret |
||
583 | |||
87 | mario79 | 584 | ;******************************************************* |
585 | fs_HasCd0: |
||
381 | serge | 586 | mov al, [DRIVE_DATA+1] |
87 | mario79 | 587 | and al, 11000000b |
588 | cmp al, 10000000b |
||
589 | setz al |
||
590 | ret |
||
591 | fs_HasCd1: |
||
381 | serge | 592 | mov al, [DRIVE_DATA+1] |
87 | mario79 | 593 | and al, 00110000b |
594 | cmp al, 00100000b |
||
595 | setz al |
||
596 | ret |
||
597 | fs_HasCd2: |
||
381 | serge | 598 | mov al, [DRIVE_DATA+1] |
87 | mario79 | 599 | and al, 00001100b |
600 | cmp al, 00001000b |
||
601 | setz al |
||
602 | ret |
||
603 | fs_HasCd3: |
||
381 | serge | 604 | mov al, [DRIVE_DATA+1] |
87 | mario79 | 605 | and al, 00000011b |
606 | cmp al, 00000010b |
||
607 | setz al |
||
608 | ret |
||
237 | serge | 609 | ;******************************************************* |
87 | mario79 | 610 | |
75 | diamond | 611 | ; fs_NextXXX functions: |
612 | ; in: eax = partition number, from which start to scan |
||
613 | ; out: CF=1 => no more partitions |
||
614 | ; CF=0 => eax=next partition number |
||
615 | |||
616 | fs_NextRamdisk: |
||
617 | ; we always have /rd/1 |
||
618 | test eax, eax |
||
619 | stc |
||
620 | jnz @f |
||
621 | mov al, 1 |
||
622 | clc |
||
623 | @@: |
||
624 | ret |
||
625 | |||
626 | fs_NextFloppy: |
||
381 | serge | 627 | ; we have /fd/1 iff (([DRIVE_DATA] and 0xF0) != 0) and /fd/2 iff (([DRIVE_DATA] and 0x0F) != 0) |
628 | test byte [DRIVE_DATA], 0xF0 |
||
75 | diamond | 629 | jz .no1 |
630 | test eax, eax |
||
631 | jnz .no1 |
||
632 | inc eax |
||
633 | ret ; CF cleared |
||
634 | .no1: |
||
381 | serge | 635 | test byte [DRIVE_DATA], 0x0F |
75 | diamond | 636 | jz .no2 |
637 | cmp al, 2 |
||
638 | jae .no2 |
||
639 | mov al, 2 |
||
640 | clc |
||
641 | ret |
||
642 | .no2: |
||
643 | stc |
||
644 | ret |
||
645 | |||
646 | ; on hdx, we have partitions from 1 to [0x40002+x] |
||
647 | fs_NextHd0: |
||
648 | push 0 |
||
649 | jmp fs_NextHd |
||
650 | fs_NextHd1: |
||
651 | push 1 |
||
652 | jmp fs_NextHd |
||
653 | fs_NextHd2: |
||
654 | push 2 |
||
655 | jmp fs_NextHd |
||
656 | fs_NextHd3: |
||
657 | push 3 |
||
658 | fs_NextHd: |
||
659 | pop ecx |
||
381 | serge | 660 | movzx ecx, byte [DRIVE_DATA+2+ecx] |
75 | diamond | 661 | cmp eax, ecx |
662 | jae fs_NextFloppy.no2 |
||
663 | inc eax |
||
664 | clc |
||
665 | ret |
||
237 | serge | 666 | |
87 | mario79 | 667 | ;******************************************************* |
668 | fs_NextCd: |
||
669 | ; we always have /cdX/1 |
||
670 | test eax, eax |
||
671 | stc |
||
672 | jnz @f |
||
673 | mov al, 1 |
||
674 | clc |
||
675 | @@: |
||
676 | ret |
||
677 | ;******************************************************* |
||
678 |