AMP Program No.6

Write an assignment on file function 43H (Set/Get file attribute) and 57h(set/get date and time) of DOS INT 21H and program to display the attributes.

Function 43H : Set/Get file attribute

With the help of this function we are able to set or get the file attributes

For its occurrence AH must be preloaded by 43H

The value of AL must be loaded according to our requirement:

If             AL = 0; get attribute

                AL = 1; set attribute

CX register must be loaded with the new attribute values

The file name must be pointed by DS : DX

Function 57h: Set/Get date and time

With the help of this function, we are able to set/get the creation date and time.

for its occurrence AH must be preloaded by 57h

The value of AL must be loaded according to our requirement:

If             AL = 0; get date and time

                AL = 1; set date and time

After successful execution, CX will contain the time and DX will contain the date

the time format is as follows:

bits (15-11) = hours

bits (10-5) = minutes

bits (4-0) = seconds

the date format is as follows:

bits (15-9) = year after 1980

bits (8-5) = month

bits (0-4) = date