0x1a中断?

　　“判断PCI机是否支持PCI”好象要产生0x1a中断。如何在linux下产生0x1a中断？

调用INT 0X1A 的B101功能，判断是否支持PCI。更详细的说明请参考
旧的程序员大本营光盘。
INT 1A - PCI BIOS v2.0c+ - INSTALLATION CHECK
AX = B101h
EDI = 00000000h
Return: AH = 00h if installed
   CF clear
   EDX = 20494350h (\' ICP\')
   EDI = physical address of protected-mode entry point (see #00731)
   AL = PCI hardware characteristics (see #00730)
   BH = PCI interface level major version (BCD)
   BL = PCI interface level minor version (BCD)
   CL = number of last PCI bus in system
EAX, EBX, ECX, and EDX may be modified
all other flags (except IF) may be modified
Notes: this function may require up to 1024 byte of stack; it will not enable
 interrupts if they were disabled before making the call
some BIOSes do not change EDI, so applications looking for the
 protected-mode entry point should set EDI to 00000000h before
 calling this function

dear syeagle:
  您好！我按您说的试了一下：
  #include....
  main()
  {
     asm(\"mov 0xb1,%ah\\n
          mov 0x01,%al\\n
          int $0x1a\");
   }

  编译通过，可是执行是报：segmentation fault!
  why?
  3kx!!!!!!!!!!!!!!1