INT 21 - DOS 2+ - "UNLINK" - DELETE FILE
AH = 41h
DS:DX -> ASCIZ filename (no wildcards, but see below)
CL = attribute mask for deletion (server call only, see below)
Return: CF clear if successful
AX destroyed (DOS 3.3) AL seems to be drive of deleted file
CF set on error
AX = error code (02h,03h,05h) (see AH=59h)
Notes:  (DOS 3.1+) wildcards are allowed if invoked via AX=5D00h, in which case
the filespec must be canonical (as returned by AH=60h), and only
files matching the attribute mask in CL are deleted
DOS does not erase the file's data; it merely becomes inaccessible
because the FAT chain for the file is cleared
deleting a file which is currently open may lead to filesystem
corruption.  Unless SHARE is loaded, DOS does not close the handles
referencing the deleted file, thus allowing writes to a nonexistant
file.
under DRDOS and DR Multiuser DOS, this function will fail if the file
is currently open
under the FlashTek X-32 DOS extender, the pointer is in DS:EDX
SeeAlso: AX=4301h,AX=5D00h,AH=60h,AX=F244h,INT 2F/AX=1113h

See also: 2113

2141 - DOS 2+ - "UNLINK" - DELETE FILE