System function 70

Function 70 - work with file system with long names support.

Parameters:

eax = 70
ebx = pointer to the information structure

Returned value:

eax = 0 - success; otherwise file system error code
some subfunctions return value in other registers too

General format of the information structure:

+0: dword: subfunction number
+4: dword: file offset
+8: dword: high dword of offset (must be 0) or flags field
+12 = +0xC: dword: size
+16 = +0x10: dword: pointer to data
+20 = +0x14: n db: ASCIIZ-string with the filename
or
+20 = +0x14: db 0
+21 = +0x15: dd pointer to ASCIIZ-string with the filename

Specifications - in documentation on the appropriate subfunction.
Filename is case-insensitive. Russian letters must be written in the encoding cp866 (DOS).
Format of filename: /base/number/dir1/dir2/.../dirn/file, where /base/number identifies device, on which file is located: one of

/RD/1 = /RAMDISK/1 to access ramdisk
/FD/1 = /FLOPPYDISK/1 to access first floppy drive,
/FD/2 = /FLOPPYDISK/2 to access second one
/HD0/x, /HD1/x, /HD2/x, /HD3/x to access accordingly to devices IDE0 (Primary Master), IDE1 (Primary Slave), IDE2 (Secondary Master), IDE3 (Secondary Slave); x - partition number on the selected hard drive, varies from 1 to 255 (on each hard drive the indexing starts from 1)
/CD0/1, /CD1/1, /CD2/1, /CD3/1 to access accordingly to CD on IDE0 (Primary Master), IDE1 (Primary Slave), IDE2 (Secondary Master), IDE3 (Secondary Slave)
/SYS means system folder; with the usual boot (from floppy) is equivalent to /RD/1

Examples:

'/rd/1/kernel.asm',0
'/HD0/1/kernel.asm',0
'/hd0/2/menuet/pics/tanzania.bmp',0
'/hd0/1/Program files/NameOfProgram/SomeFile.SomeExtension',0
'/sys/MySuperApp.ini',0

Available subfunctions:

subfunction 0 - read file
subfunction 1 - read folder
subfunction 2 - create/rewrite file
subfunction 3 - write to existing file
subfunction 4 - set file size
subfunction 5 - get attributes of file/folder
subfunction 6 - set attributes of file/folder
subfunction 7 - start application
subfunction 8 - delete file/folder
subfunction 9 - create folder

For CD-drives due to hardware limitations only subfunctions 0,1,5 and 7 are available, other subfunctions return error with code 2.
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.