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| <title>Sys. function 70</title> |
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| <h2>System function 70 - Work with file system with long names support</h2> |
| <text>Parameters:</br> |
| Register eax = 70</br> |
| Register ebx = pointer to the information structure</br> |
| Returned value:</br> |
| Register eax = 0 - success; otherwise file system error code some subfunctions return value in other registers too.</br> |
| General format of the information structure:</br> |
| +0: dword: subfunction number</br> |
| +4: dword: offset in file or folder</br> |
| +8: dword: higher part of offset or flags</br> |
| +12 = +0xC: dword: size of data</br> |
| +16 = +0x10: dword: pointer to data</br> |
| +20 = +0x14: ?: path - zero terminated string</br> |
| or</br> |
| +20 = +0x14: byte: 0</br> |
| +21 = +0x15: dword: pointer to string</br> |
| Case sensitivity depends on filesystem.</br> |
| If a path not begins with '/', it is considered a relative.</br> |
| To get or set the current folder, use the sysfunction 30.</br> |
| '../' in the path means a lift by one folder relatively current folder.</br> |
| To set the encoding, put at the start of the string a byte with next values:</br> |
| 1 = cp866</br> |
| 2 = UTF-16LE</br> |
| 3 = UTF-8</br> |
| otherwise will be used cp866. In an absolute path you may put this byte after the '/' or put an additional '/' before it.</br> |
| Also, you may use the sysfunction 80.</br> |
| Format of an absolute path: /base/number/dir1/dir2/.../dirn/file, where base/number identifies device, on which file is located:</br> |
| RD/1 = ramdisk</br> |
| FD/1 = first floppy drive, FD/2 = second floppy drive</br> |
| HD0/x, HD1/x, HD2/x, HD3/x = hard drives accordingly on IDE0 (Primary Master), IDE1 (Primary Slave), IDE2 (Secondary Master), IDE3 (Secondary Slave); x - partition number on the selected hard drive, starts from 1</br> |
| CD0/1, CD1/1, CD2/1, CD3/1 = same for cd</br> |
| SYS = system folder (encoding inaffected key), second key may be set by sysfunction 30.3.</br> |
| Examples:</br> |
| '/sys/example.asm',0</br> |
| '/rd/1/example.asm',0</br> |
| '/HD0/1/folder/file.txt',0</br> |
| '/hd2/2/pics/tanzania.bmp',0</br> |
| 2,'/',0,'sys','/',0,'F',0,'I',0,'L',0,'E',0,0,0</br></br> |
| |
| Available subfunctions:</br> |
| subfunction 0 - read file</br> |
| subfunction 1 - read folder</br> |
| subfunction 2 - create/rewrite file</br> |
| subfunction 3 - write to existing file</br> |
| subfunction 4 - set file size</br> |
| subfunction 5 - get attributes of file/folder</br> |
| subfunction 6 - set attributes of file/folder</br> |
| subfunction 7 - start application</br> |
| subfunction 8 - delete file/folder</br> |
| subfunction 9 - create folder</br> |
| For CD-drives due to hardware limitations only subfunctions 0,1,5 and 7 are available, other subfunctions return error with code 2.</br> |
| At the first call of subfunctions 0,1,5,7 to ATAPI devices(CD and DVD) the manual control of tray is locked due to caching drive data. Unlocking is made when subfunction 4 of function 24 is called for corresponding device.</br> |
| </br> |
| Value for register eax - 70 (SF_FILE).</br> |
| Values for register ebx:</br> |
| 0 - SSF_READ_FILE - subfunction 0 - read file with long names support.</br> |
| 1 - SSF_READ_FOLDER - subfunction 1 - read folder with long names support.</br> |
| 2 - SSF_CREATE_FILE - subfunction 2 - create/rewrite file with long names support.</br> |
| 3 - SSF_WRITE_FILE - subfunction 3 - write to existing file with long names support.</br> |
| 4 - SSF_SET_END - subfunction 4 - set end of file.</br> |
| 5 - SSF_GET_INFO - subfunction 5 - get information on file/folder.</br> |
| 6 - SSF_SET_INFO - subfunction 6 - set attributes of file/folder.</br> |
| 7 - SSF_START_APP - subfunction 7 - start application.</br> |
| 8 - SSF_DELETE - subfunction 8 - delete file/folder.</br> |
| 9 - SSF_CREATE_FOLDER - subfunction 9 - create folder.</br> |
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