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Disk Functions
Setup values for the bios peramater block
- IN:
Nothing - OUT:
Nothing
Read the given sectors from the disk
- IN:
ES:DI, AX:DX, CX= Location to load the sectors, LBA, Sectors to read - OUT:
CF= Carry flag set on error
Write the given sectors to the disk
- IN:
ES:DI, AX:DX, CX= Location of sectors to write, LBA, Sectors to write - OUT:
CF= Carry flag set on error
Allocates and load the current working directory into memory
- IN:
Nothing - OUT:
ES:DI, CF= Location of dir in memory, Carry flag set on error
Unallocate and free the current working directory from memory
- IN:
Nothing - OUT:
Nothing
Load the current working directory into memory
- IN:
ES:DI= Location to load the dir - OUT:
CF= Carry flag set on error
Write the current working firectory to the disk
- IN:
ES:DI= Location of the dir to write - OUT:
CF= Carry flag set on error
Allocate the current dir into the memory map
- IN:
Nothing - OUT:
ES:DI, CF= Location allocaded for the dir, Carry flag set on error
Free the current working dir from use in the memory map
- IN:
ES:DI= Location of dir to free from memory - OUT:
Nothing
Allocates and load the FAT table into memory
- IN:
Nothing - OUT:
ES:DI, CF= Location of FAT in memory, Carry flag set on error
Unallocate and free the FAT table from memory
- IN:
Nothing - OUT:
Nothing
Read the FAT table into memory
- IN:
ES:DI= Location to load the FAT - OUT:
CF= Carry flag set on error
Write the FAT table to the disk
- IN:
ES:DI= Location of the FAT to write - OUT:
CF= Carry flag set on error
Allocate the FAT table into the memory map
- IN:
Nothing - OUT:
ES:DI, CF= Location allocaded for the FAT, Carry flag set on error
Free the FAT table from use in the memory map
- IN:
ES:DI= Location of FAT to free from memory - OUT:
Nothing
Search through a loaded dir for a single file
- IN:
ES:DI, DS:SI= Disk buffer with loaded dir, Filename in 8.3 format - OUT:
ES:DI, CF= Pointer to file entry, Carry flag set on error
Change the current working directory
- IN:
DS:SI= Directory to search for - OUT:
CF= Cary flag set on error
Create an empty directory
- IN:
DS:SI= Directory to create - OUT:
CF= Cary flag set on error
Remove an empty directory
- IN:
DS:SI= Directory to remove - OUT:
CF= Cary flag set on error
Search for a file and return it's size
- IN:
DS:SI= Filename to search for - OUT:
AX:DX, CF= Filesize, Carry flag set on error
Search for a file to see if it exists
- IN:
DS:SI= Filename to search for - OUT:
CF= Cary flag set on error
Create an empty file
- IN:
DS:SI= Filename to create - OUT:
CF= Carry flag set on error
Rename a file
- IN:
DS:SI, ES:DI= File to rename, New filename - OUT:
CF= Carry flag set on error
Delete a file
- IN:
DS:SI= File to delete - OUT:
CF= Carry flag set on error
Read a file from disk and into memory
- IN:
DS:SI, ES:DI= Name of file to read, Location to load the file - OUT:
DX:AX, CF= Filesize, Carry flag set on error
Write a file from memory onto the disk
- IN:
DS:SI, ES:DI, DX:AX= Name of file to write, Location of file's contents, Filesize - OUT:
CF= Carry flag set on error