Interrupt 21h Function 7139h 

Creates a new directory having the given name.

mov ax, 7139h     ; Make Directory

mov dx, seg Name  ; see below

mov ds, dx

mov dx, offset Name

int 21h

jc  error

Parameters

Name

Address of a null-terminated string specifying the name of the directory to create. Long filenames are allowed.

Return Value

Clears the carry flag if successful. Otherwise, the function sets the carry flag and sets the AX register to an error value.