如何区分机器上安装的多枚1394卡

我的程序要求能区分出机器上安装的多枚1394卡,但我不知该如何下手,请问下这个功能能实现吗?如何实现?W2K DDK中提供1394 SAMPLE用的上吗?

ba=MemBase;
Mapping_Counter++;
PCI_WRITE_DWORD(FW_OP_BASE,ba,hc->PCI_Reg_Base);
hc->OHC.Op_base=ba;
hc->OHC.Op_Reg=(LLCRegStruct far *)RealToLinear(ba);
hc->OHC.Op_Reg_Seg=FP_SEG(hc->OHC.Op_Reg);
hc->OHC.Op_Reg_Off=FP_OFF(hc->OHC.Op_Reg);

OHCI_SEG=hc->OHC.Op_Reg_Seg;
OHCI_OFF=hc->OHC.Op_Reg_Off;
PCI_BASE=hc->PCI_Reg_Base;
//--------------------
//active the PCI interface
//--------------------
//PCI.Command.MemoryEnable
//PCI.Command.BusMasterEnable
PCI_Command.Reg = pci_read_word(PCI_Command_Reg, PCI_BASE);
PCI_Command.BitMap.MEMORY_ENB =1;
PCI_Command.BitMap.MASTER_ENB =1;
pci_write_word(PCI_Command_Reg, PCI_Command.Reg, PCI_BASE);
//------------------
//OHCI initialize
//------------------
//All OHCI initialize is performed by accessing registers in the OHCI registerspace
//All OCHI registers must be accessed via a single 32-bit read or write
//Verify Memory map is correct
//Check if the BusID value equal 0x31333934
ULONG BusID= MEM_READ_DWORD(OHCI_SEG,OHCI_OFF+OHCI_BusID_Reg);
if (BusID ==0x31333934L){
setbit(Mapping_Flag,i);
break;
}
else{
if (Mapping_Counter ==0xF){
  printf(\"Memory Mapping is Not Correct!!!\\n\");
return;
}
}
}
else{
  if (i ==0xf){
printf(\"Memory Mapping is Not Correct!!!\\n\");
return;
  }
}
自己看！！！