INT 21,5E AL=01 Set Machine Name (DOS 3.1+)

AH = 5E

AL = 01 set machine name

CH = 00 undefine name

= any other value means to define name

CL = name number

DS:DX = pointer to 15 byte, blank padded ASCIIZ name string

on return:

AX = error code if CF set, (invalid function)

- specifies the network machine name on a Microsoft network

- unpredictable if called without file sharing loaded