;syscall for creating a new file.
mov dx,offset filename
mov cx,0
mov ah,5Bh
int 21h
;if error occurs, will return carry set and error code in ax
;Error code 03h = path not found
;Error code 04h = Too many open files
;Error code 05h = Access denied
;Error code 50h = File already exists

jnc noError                       ;continue with program

     cmp ax,03h
     je PathNotFoundError         ;unimplemented exception handler

     cmp ax,04h
     je TooManyOpenFilesError

     cmp ax,05h
     je AccessDeniedError

     cmp ax,50h
     je FileAlreadyExistsError

noError: