Int 2C Fn 0001  P - Cloaking - Free Gdt Selector                           [m]

   AX = 0001h
   SI = selector

Return: CF clear if successful
   CF set on error
       AX = error code (see #2244)

Note:  this function was first introduced with RM386 (RAM-MAN/386) v6.00

See Also: AX=0000h,INT 2F/AX=4310h"Cloaking"