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Author Topic: COM 1 error  (Read 4402 times)

September 06, 2010, 04:46:00 pm

Offline Compuitincolo

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COM 1 error
Hi there, I ran a test 5 motherboard/video test on DOS PCD 7.5 and got the following error on a laptop toshiba satellite A215:

COM 1 Registers And Interrupts..........
  Baud rate divisor failed
  Line control register pattern test failed
  Modem control register failed
  Interrupt failed. It was not generated.
COM 1 Registers And Interrupts..........FAILED  09/06/2010 14:59
COM 1 Internal Loopback.................
  RTS-->CTS DTR-->DSR Delta-CTS Delta-DSR Failed
  Incorrect character count at 19200 BPS (394 vs 96)
    00: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
    10: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
    20: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
    30: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
    40: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
    50: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
    60: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
    70: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
    80: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
    90: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
    A0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
    B0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
    C0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
    D0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
    E0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
    F0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
    100: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
    110: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
    120: FF FF FF FF FF FF FF FF FF FF FF FF 00 00 00 00
    130: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    140: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    150: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    160: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    170: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    180: 00 00 00 00 00 00 00 00 00 00
  Incorrect character count at 38400 BPS (394 vs 96)
    00: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
    10: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
    20: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
    30: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
    40: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
    50: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
    60: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
    70: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
    80: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
    90: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
    A0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
    B0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
    C0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
    D0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
    E0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
    F0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
    100: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
    110: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
    120: FF FF FF FF FF FF FF FF FF FF FF FF 00 00 00 00
    130: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    140: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    150: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    160: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    170: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    180: 00 00 00 00 00 00 00 00 00 00
  Incorrect character count at 57600 BPS (394 vs 96)
    00: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
    10: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
    20: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
    30: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
    40: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
    50: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
    60: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
    70: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
    80: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
    90: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
    A0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
    B0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
    C0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
    D0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
    E0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
    F0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
    100: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
    110: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
    120: FF FF FF FF FF FF FF FF FF FF FF FF 00 00 00 00
    130: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    140: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    150: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    160: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    170: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    180: 00 00 00 00 00 00 00 00 00 00
  Incorrect character count at 115200 BPS (394 vs 96)
    00: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
    10: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
    20: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
    30: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
    40: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
    50: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
    60: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
    70: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
    80: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
    90: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
    A0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
    B0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
    C0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
    D0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
    E0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
    F0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
    100: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
    110: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
    120: FF FF FF FF FF FF FF FF FF FF FF FF 00 00 00 00
    130: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    140: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    150: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    160: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    170: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    180: 00 00 00 00 00 00 00 00 00 00
COM 1 Internal Loopback.................FAILED  09/06/2010 15:00
COM 1 FIFO Buffers (16550A).............
  Serial port is not 16550A or IBM Type 3
COM 1 FIFO Buffers (16550A).............N/A    

    I've never found this error before, everything else passed just fine. Is this really bad?
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September 07, 2010, 08:42:20 am Reply #1

Offline fwilson

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Re: COM 1 error
Compuitincolo,

I looked at the specs of this system and I found no mention of either a serial port or a modem.  I have seen a few newer systems with no serial ports and with the functionality "mostly" disabled.  What I mean to say is that while there is no serial port functionality in the system the COM ports are still included in the chipset but not fully functional.  When we test the non functional COM ports we get errors as we do when testing "winmodems" software driven modems that require windows and drivers to operate. These types of modems do not have interrupts and base I/O address as the older type or serial ports do.

If this is the case then the results can safely be ignored and the COM port tests can be disabled so the test runs clean. 

-Fred
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“Integrity is doing the right thing, even if nobody is watching.”  ~ J.C. Watts
September 07, 2010, 10:41:55 am Reply #2

Offline Compuitincolo

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Re: COM 1 error
I updated the BIOS for this system and it is really simple. It doesn't say anything about disabling this option. Even though there is not a physical serial port and/or modem, it has the regular phone plug and the Ethernet adapter. I ve noticed that the Ethernet connector is not working, fortunately the wireless does. Do you thing that might be the error shown? If it is, would I try to mess with this mother board and have it replaced?   
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September 07, 2010, 11:55:30 am Reply #3

Offline fwilson

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Re: COM 1 error
Compuitincolo,

I see, the system has a winmodem (the normal phone plug on the laptop). We are unable to test these with PC-Doctor because of reasons I said earlier. I would just not run the serial port / modem tests. 

As far as the ethernet port goes, if the wireless works you should be OK. If a driver update does not get the wired Ethernet port working, purchasing an inexpensive USB to ethernet adapter would be less expensive than replacing the motherboard and could be used on other systems as well.

-Fred
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“Integrity is doing the right thing, even if nobody is watching.”  ~ J.C. Watts
September 08, 2010, 01:45:17 pm Reply #4

Offline Compuitincolo

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Re: COM 1 error
thank you for the advice.
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September 08, 2010, 03:14:58 pm Reply #5

Offline fwilson

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Re: COM 1 error
Compuitincolo,

You are most welcome.

-Fred
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