Int 16 Fn FE55  U - PC Tools V8+ Programs - Get ???                        [U]

   AX = FE55h
   CX = segment of resident program or 0000h for last loaded
   DX = 0000h

Return: DX = resident code segment (unchanged if CX=0000h on entry)
   AX = ??? or 0000h

Note:  this call is supported by CPSCHED, CPTASK, DATAMON, DPROTECT, DRIVEMAP,
     and DSKLIGHT beginning in PC Tools v8.0; programs other than CPTASK
     seem to hook it merely to return the same AX as the CPTASK loaded
     prior to them returned