INT 21 - DOS 2+ - "UNLINK" - DELETE FILE AH = 41h DS:DX -> ASCIZA NUL-terminated ASCII string. The ASCIZ string "ABC" consists of the four bytes 41h, 42h, 43h, and 00h. Unless otherwise specified, maximum lengths given in the interrupt list do not include the terminating NUL. filename (no wildcards, but see notes) CL = attribute mask for deletion (server call only, see notes) 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 #01680 at AH=59h/BX=0000h) 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 DR DOS 5.0-6.0 returns error code 03h if invoked via AX=5D00h; DR DOS 3.41 crashes if called via AX=5D00h with wildcards DOS does not erase the file's data; it merely becomes inaccessible because the FATsee File Allocation Table 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 DR DOS 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 BUG: DR DOS 3.41 crashes if called via AX=5D00h SeeAlso: AH=13h,AX=4301h,AX=4380h,AX=5D00h,AH=60h,AX=7141h,AX=F244h SeeAlso: INT 2F/AX=1113h