Int 15 Fn 1021  - Topview - "pgmint" - Interrupt Another Task              [Q]

   AX = 1021h
   BX = segment of object handle for task to interrupt (not self)
   DX:CX -> FAR routine to jump to next time task is run

Return: nothing

Notes: the FAR routine is entered with the current ES, DS, SI, DI, and BP
     values, using the task's internal stack (see AX=101Ah); only SS:SP
     needs to be preserved
   multiple PGMINTs to a single task are processed last-in first-out
   if the other task is in a DOS or DV API call, the interruption will
     occur on return from that call