INT 21,16 - Create a File Using FCB

AH = 16h

DS:DX = pointer to an unopened ~FCB~

on return:

AL = 00 if file created

= FF if file creation failed

- creates file using FCB and leaves open for later output

- FCB must be setup with drive id, filename, and extension

before call

- an extended FCB can be used to also set ~file attributes~