Int 67 Fn 2833  - Q87 V4+ - Prepare To Unload And Get Xms Handle For Q87   [u]

   AX = 2833h
   EAX = 29482833h (entire EAX value required)

Return: EAX = XMS handle for memory allocated when Q87 was installed
   EBX = status
       00000000h Q87 is in demo mode (countdown running);
             Q87 remains active
       00000001h Q87 is in registered mode; memory manager's IDT, GDT,
             and optionally CR0 (if BL <> 5Fh on entry) have
             been restored
       00000002h Q87 is in demo mode (demo time has expired);
             Q87 remains active

Note:  this call is used by UNLOAD87 to release the memory used by Q87
BUG:   v4.00-v4.03 will hang on most machines when run under bare DOS with
     no memory manager, because neither Q87 nor UNLOAD87 checks whether
     there is a valid INT 67 handler before performing an installation
     check via INT 67

See Also: AX=4321h,INT 21/AX=4321h/BX=0000h