Int 2C Fn 0000  P - Cloaking - Allocate Gdt Selector                       [m]

   AX = 0000h
   EBX = base address
   CL = access mode byte
   CH = extended access mode byte (omit limit field)
   EDX = segment limit

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

Notes: this INT 2C interface is used by Netroom's DPMI.EXE v3.00
   to access extended memory, set the base address to the desired
     physical address plus 400000h (4M)
   this function was first introduced with RM386 (RAM-MAN/386) v6.00, the
     memory manager included in Helix Software's Netroom

See Also: AX=0001h,AX=0002h,AX=0003h,AX=0004h,AX=0005h,INT 31/AH=57h,#0427

(Table 2244)
Values for Cloaking error code:
 0001h no more selectors
 0002h not a GDT ring 0 selector
 0003h invalid selector (out of range, not user selector)
 0004h selector not allocated