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Usb Serial Port Adapter

Q: Usb Serial Port Adapter

i have a usb serial port adapter and i trying to figure out to set the usb jack on the desk top to be port1, port2, port3, or port4. if this is an easier process with xp i can change to the laptop

RELEVANCY SCORE 200
Preferred Solution: Usb Serial Port Adapter

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A: Usb Serial Port Adapter

hi,,, im not quite with you on this,,,, do you mean when you click on the "safely remove hardware" button on the notifacation area near the clock,,, where it says "safely remove mass storage device, D:E:F:G:" etc???

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RELEVANCY SCORE 72.8

I have 2 different adapters and neither one will work on my new computer with windows 8. Any fixes? Are there any adapters available that will work on windows 8?
 

A:USB to serial port adapter not working on Windows 8

Welcome to Tech Support Guy

What is the serial device you are trying to connect
What is the make of the USB to serial adapter

The problem is that the processor chip - YES they do have one, is not in many cases compatible with Windows 8, especially 64 bit, as of course the actual working of the adapter is achieved by connection to the USB port and then transmission of data from and to the USB hub.

Not knowing what you actually wish to connect your best first port of call is here to see what is on offer
http://uk.startech.com/Cards-Adapters/Serial-Cards-Adapters

scroll down for USB to serial or click USB on menu at top
 

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RELEVANCY SCORE 72

My PC doesnt have a parallel port. My printer is not USB-capable. So, I connected an adapter (9-pin plug in one end/25-pin plug other end) to the 9-pin serial port of the PC and plugged the printer cable in the adapter. On connecting, the PC communicated w/the printer because a paper came out with a single black square on top. But I could not get it to print again. I tried printing directly from CMD prompt to LPT1; then tried COM1 and COM2 - No luck. Any suggestions? The printer is a discontinued HP Laserjet 4000 - it may have a serial port, in which case I may go from serial to serial but, is that okay? Thanks for your help.
 

A:Serial Port Adapter for Parallel Printer Cable

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RELEVANCY SCORE 59.2

Need some advice a quick as possible.

Windows XP Pro
ofc had a built in serial port go bad, it was hooked to a charicter generator (don't no how to spell charicter) for a tv channel.
Installed a Controller Card with two serail ports PCI Multi I/O Controller Card, it didn't show up in the device manager was having problems getting the driver to work. says to load driver first then put in the pci card. Anyway it wouldn't work. The port that was built in (that went bad was on com 1) When the new card didn't work I used a usb with a serial adaptor and it went in fine and showed up in the divice manager and it said it was working and it started out on com 3, I no each time you plug the adaptor into a different usb port it goes to a different com port. That isn't a problem cause it would stay in the same port. Anyway device manager said it was working we changed the charicter generator to com 3 but it wouldn't work. We no the cables are good. I then got a PCI Card with one serial port instead of two and installed it and it show right up in the device manager and said it was working and I for get what comport it was on but changed it to com 1. that port didn't work either. Finally brought in another windows xp computer and hooked everhthing to it and it works. The xp computer I brought in had no serial port so used the same usb to serial adaptor that we had used and it work the first time. Show up in the device manager just like on the first comp... Read more

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RELEVANCY SCORE 58.4

I'm looking for two drivers, and have run into a bit os a wall on the Lenovo driver website. - PCI Simple Communicator Port- PCI Serial Port Computer: Thinkcenter M58 8910 ARU.   Windows 7, 64 bit. I dropped a new hard drive and a PCI card into this machine, and everything looks good except that the PCI card is not recognized.  I see similar posts here, but none with solutions that work for my exact situation.  I'm not a tech guru, just a semi-educated user.  8^)  Any help is greatly appreciated! Thanks, 

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RELEVANCY SCORE 58.4

I'm looking for two drivers, and have run into a bit os a wall on the Lenovo driver website. - PCI Simple Communicator Port- PCI Serial Port Computer: Thinkcenter M58 8910 ARU.   Windows 7, 64 bit. I dropped a new hard drive and a PCI card into this machine, and everything looks good except that the PCI card is not recognized.  I see similar posts here, but none with solutions that work for my exact situation.  I'm not a tech guru, just a semi-educated user.  8^)  Any help is greatly appreciated! Thanks,Bob 













Solved!

Go to Solution.

A:PCI Simple Communicator Port and PCI Serial Port drivers for M58

I have the same problem with M58P and Windows 8.1_x64.- http://support.lenovo.com/br/pt/products/desktops-and-all-in-ones/thinkcentre-m-series-desktops/thin...On page no information about the PCI Serial Port driver.Any suggestion?

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RELEVANCY SCORE 57.2

I have an amateur radio program installed on my desktop Dell PC runnning Windows 7. The program is correctly installed but when I try to communicate using the Internet I hear no sound from my speakers. I am connected to the other station but still no sound.
I get a message saying "cannot open serial port COM1. I would like to know how to convert a USB port to a Serial port. Please advise.
Thank you

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RELEVANCY SCORE 53.6

Hi! There are some tablets I have my eye on, on ebay. But they've got connections that are made for a mac on them. I was wondering if there is an adapter out there that will let me connect these Wacom tablets to my PC. If they exist and someone can direct me to a place online that sells an adapter, that would be awesome! The sooner, the better please ! Thank you kindly!
 

A:Mac serial to PC serial adapter?

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How does a serial port look like?
 

A:Serial Port

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So im going to try to explain this as well as i can.
I am running a windows 7 and I have a radio I would like to program. The main issue is that the program needed to program it is for DOS. So I installed DOS 6.22 On my VMWare virtual machine (VMware Workstation 8.0.0) and ran the program. Now the radio connects with a serial cable. but since I am using my laptop (lenovo ideapad z575) It does not have a Serial port. So I am using a USB to Serial Adapter (Trendnet TU-S9). But DOS will not recognize it.

What I am wanting to do overall is to make my windows 7 computer assume that my USB adapter is a physical Serial port so that I can go into VMware and attach a "physical" serial port to my VM. any Ideas or other suggestion i could try? thanks and sorry for the read.

A:USB serial port help

Did the trendnet USB to serial adapter come with drivers? Usually devices like that will. If not you can find them on the website most of the times. You may have to just install the drivers on your machine, and within the VM.

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RELEVANCY SCORE 52.8

I have a second older computer for my child, I do not have funds for purchasing new one for about a year. His mouse sucks. It's an old serial port mouse. There seems to be no PS2 port for a mouse. I bought an optical usb. I have a serial to ps2 connector, and a ps2 to usb, all plugged into one another lol. Have floppy for new optical. Reboot. No detection of a mouse. Go to run>A:/setup.exe, it goes to install but doesnt work as it does not detect a device. Do I need an additional driver for the serial to ps2? PLEASE tell me I can do this, I would really like to do this for my kid, if there is a way to config this, please help me? Thank you. He is on win98se. I sure hope I can do this! I would make him one happy kid for sure! ( I cannot stand that serial mouse either !! )
 

A:serial port to ps2 to usb please???

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Why are new systems frequently being made without RS-232 serial ports?
 

A:New RS-232 Serial Port?

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RELEVANCY SCORE 52.8

Hi Support, I have just upadted my windows to 10 (x64) and I have found PCI serial posrt is missing can not updated via windows when i went through the details got that : PCI\VEN_8086&DEV_2E17&SUBSYS_3034103C&REV_03PCI\VEN_8086&DEV_2E17&SUBSYS_3034103CPCI\VEN_8086&DEV_2E17&CC_070002PCI\VEN_8086&DEV_2E17&CC_0700 under Hardwearids, could you help me please!





Lion Lover

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RELEVANCY SCORE 52.8

I have Palm VIIx. The hot sink was working ok before. But now it says "com1 port used by other programs and so it is not available. I am using windows xp.

A:Serial port

Go into add hardware scroll through to add another port, tell it hardware is there click next when you get to the applet that gives you the option to manually select click it then scroll trought list to find(CON & LPT) high light click next it will appear in the next section that is about all I can remember don't have an XP machine up right now.
 
Phil

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serial port disabled need to enable without using cmos (no password)
 

A:serial port

To enable the serial ports you are going to get the BIOS password or override it. What make and model PC is it? Also what BIOS and version is it? You can see them after powering on the PC while it is booting.
 

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Hi to all, should I install a serial port on the PC Pavilion? you know some working product? thank youDamiano

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RELEVANCY SCORE 52.8

I am trying to connect my fiancee's palm pilot via serial port to my computer running windows XP. I have tried both serial ports on the back of my computer (one has a picture of a monitor and one has a picture of what reminds me of a lego Oh, and these are 9-pin ports I believe). Anyway, I can't get the palm pilot to sync with the computer. After looking at the FAQ section on Palm's website, it sounds like the reason it isn't working is because of conflicting COM/IRQ addresses.

Can someone please tell me the best way to see if there are any COM ports available on my computer and, if there's not, how to free one up? Thanks in advance!
 

A:Serial Port Help

If the plug has a pic of a monitor on it, the socket is probably for the onboard Video. I'm guessing that you are not in the right area for the serial ports?
 

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RELEVANCY SCORE 52.8

Hi,

I just installed Windows 7 and updated all my drivers. I am missing two drivers, and I don't know what they are:

PCI Serial Port
PCI Simple Communication Controller

What exactly are these? I own a Lenovo X200 Tablet. Any ideas where I can find the drivers for these two things?

Thanks,

A:PCI Serial Port?H

Hi Akimatsu,

Have a look here
Lenovo Support & downloads - ThinkPad X200 Tablet support

These are for your model, download and try all the Vista drivers that you dont have or you are not sure of

I hope this helps

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RELEVANCY SCORE 52.8

Hi - I am selling a sewing machine that has a serial port on the side but most people use USB sticks these days to transfer embroidery designs into their machines. The convertors I have seen have a male connection whereas I need a female connection. Does anyone know if there is a convertor that has a female connection? Thanks!
 

A:Help with serial to USB port

Hi judysue2, and welcome to TSG.

Are you talking about the USB connector or the 9 pin D-sub serial connector?

There are 9 pin serial cables that come in all combinations of male and female connectors on each end. There are also 9 pin D-sub "gender changer" blocks available.

EDIT: The serial port on your sewing machine is most likely designed to connect to a computer running specific downloading software for the machine. A general purpose serial-to-USB adapter would not have the built-in software needed to read the memory stick and send the data to the machine.
 

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RELEVANCY SCORE 52.8

Everytime I turn on computer its trying to install new hardware. "PCI SERIAL PORT" . Please help me to solve this problem.
 

A:Pci Serial Port

Give us as much computer info on your system as you can to enable us to help you.
 

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RELEVANCY SCORE 52.8

i need the pci serial port driver for Elitebook 8460p -Windows 10 64bit

A:pci serial port

Hi: You need this driver for that device... This package provides the Intel Management Engine Interface (MEI) Driver for the supported notebook models and operating systems. The Intel Management Engine Interface enables communication between the host operating system and the Intel Management Engine firmware. ftp://ftp.hp.com/pub/softpaq/sp64001-64500/sp64098.exe

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RELEVANCY SCORE 52.8

Hello ,im using elitebook hp8530p and i cant find driver PCI serial port for windows 10 64bit.Any solution ? Thanks

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RELEVANCY SCORE 52.8

I need to turn on my serial port and I don't know how to access the controls in the BIOS...
I have a Compaq Presario 5108US desktop. I have disabled the Windows XP "welcome screen" during reboot so that now I see the commands when my computer boots up. I don't know the proper keys to push to allow me to access the BIOS controls.

Can anyone help?

A:Serial port

Sorry I didn't get back to you on the other post, been crazy around here...

Anyway, press F10 repeatedly when your computer boots up to enter the BIOS. After you reach the BIOS main menu, see if you can find a menu or setting for Serial Port. It is probably under the menu, Integrated Peripherals, or a menu similar to that. There should be an "Enable/Disable" option.

Let me know if this works for you

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RELEVANCY SCORE 52.8

At work I was using a laptop with a serial port, which I used to communicate with an electronic device. The application used for the communication between the laptop and the device is designed to use a serial port.
The problem is I have now got a new laptop without a serial port (this seems to be the thing now!?) and I'm trying to use the USB port instead. My laptop doesn't like this at all!
Is there any way to configure the laptop to make the application think that it is talking to a serial port when it is in fact connected to the USB?
Any pointers anyone?
Cheers
 

A:Serial port and USB

You can purchase a USB to Serial adaptor, I Googled it...
http://www.google.co.uk/search?q=usb+to+serial+converter&ie=UTF-8&oe=UTF-8&hl=en&meta=
 

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RELEVANCY SCORE 52.8

Hello. I have a digital camera that must use a serial port. I can not get the comp. to recognize the camera. The software that came with the camera has been successfully installed (or so I'm told). I have two serial ports, one is 9 pin the other is larger.The camera requires the 9 pin connection. The 9 pin is on Com 1 and has the settings IRQ:4 Range:03F8-03FF. I am using a cable modem, and I do not have a dial up modem installed. I have checked the device manager and there are no exclaimation points or "X's" by Com 1. Device manager also reports no conflicts with Com 1. Any suggestions for resolving this problem would be appreciated.
 

A:serial port

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RELEVANCY SCORE 52.8

I have reviewed the other serial port malfunction thread, but it didn't seem to correct my problem. My computer will not recognize a device plugged into the serial port. I have confirmed the settings for the port which concur with COM 1, but I continue to receive a "device not connected" in the software.
 

A:Serial Port

Check to make sure the serial port is enabled in the bios. Sometimes, one will be disabled by default (to make us crazy), but it's easy to fix.
 

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RELEVANCY SCORE 52.8

could someone explain to me how to configure a serial port on the back of a laptop so i can connect a dds modem, always on ?
thanks
 

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RELEVANCY SCORE 52.8

On an Acer travelmate 518TX serial port I feed signals coming from a DSP. The signal is processed by a charting software that builds up the page line by line.
Happens that the image makes, at regular intervals a small jump to the left. So doing the final page is make up in stripes.
The software manufacturer states that some othe program is interrupting the incoming data stream from serial port, suggesting to disabling the Power Management System. I did it without any result.
My question is:
Can someone address me to what could be devices or software that commonly sample the serial port ? In order to investigate on how to stop this chopping activity.
Thanks for support

Manlio Laschena

mailto:[email protected]
 

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RELEVANCY SCORE 52

I am planning on buying an MSI P67A-GD55 (B3) motherboard and I noticed it has a serial port header onboard. I would like to know where I wan buy an adapter to utilise this header. I searched it up and found this: http://www.cablestogo.com/product.asp?cat_id=3543&sku=28300
But that is just for Intel motherboards. Does anyone know where I can get one for my motherboard?
 

A:Solved: Where to buy serial port?

That adaptor should work fine on that board as far as I can tell. When it says its for Intel boards it is refering to the motherboard chipset not the manufacturer. The MSI board you have listed has a serial port connector and they are standard as far as I am aware. However, I haven't used or needed a serial port for many years so I am not overly familiar with them.

Motherboard detailed specs here.
 

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I'm having a very strange problem with my COM 1. I'm trying to connect my new electronic organizer to syncronize with my pc. I plug the serial port in to both devices with the computer shut down. Whenever I boot my computer, it loads windows and then IMMEDIATELY shuts right back down. Any ideas what would cause this???? It only happens when the serial bus (COM 1) is plugged in.

Thanks for any ideas!
 

A:Serial Port (COM 1) Problem???

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RELEVANCY SCORE 52

Does the HP Probook 650 G1 Notebook PC come with a built in RS232 serial port. If not is it an option. If it is not avaiable is there a model with the RS232 port built in or available with an option.

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RELEVANCY SCORE 52

i on my Lenovo T500- device manager- other device- pci serial port is having a yellow mark.
i wewent to lenovo's website, but coulnd't find any driver for that., as well as googled

please help- this is urgent.

Regards
Phi

A:pci serial port is missing

i forgot to mention. it is running xp sp3. thanks

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RELEVANCY SCORE 52

Sometimes during the debugging of a blackbox via RS-232, my PC crashes with a BSOD.
The serial port is working at 9600bps 8N1.
Following the instructions in
Blue Screen of Death (BSOD) Posting Instructions
i attached here the related zip file.
Thank You for any support.

A:BSOD using USB serial port

Search for any possible driver update in Products

But such port converters are naturally unstable. Driver might not be the real cause.

Code:
Probably caused by : ser2pl64.sys ( ser2pl64+ede8 )

Followup: MachineOwner
--------------------
Image name: ser2pl64.sys
Timestamp: Fri Aug 15 13:02:41 2014 (53EDB799)

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RELEVANCY SCORE 52

I'm running as ASUS A7V600 motherboard, WIN XP Home edition. Two on-board serial ports, Award V6.0 BIOS. I have four serial ports, the second two being on a Lava DSerial PCI card. The serial ports are necessary in order to interface with some equipment that pre-dates USB. The application software that's used has a sensitivity to the I/O address (not the COM port number), and will work properly only when the I/O address is that which is normally associated with a given com port number.

So, the software works just fine with the two onboard ports since they have the addresses 03F8 and 02F8. However, the Lava port addresses on com 3 and com4 are set to FFE8 and FFF8. Win XP home allows you to change the com port number OK, but doesn't allow you to change the I/O address range used as previous OSs did. Lava tech support says the addresses are assigned by the BIOS and there's nothing they can do.

There must be some way to influence the BIOS into assigning other I/O addresses (03E8 and 02E8 would be nice!), but haven't had any luck with that. Is there some way I can force this to come out the way I want?
 

A:Serial port I/O addresses

Radioman

Does the A7V MB have any ISO slots? If it does you can use a ISO COM card from
a site that I buy parts from:

www.cyberguys.com

If it does not have any ISO slots? You can still check with cyberguys to see if they have a addressable PCI COM card.

Hope that this helps

C.B.
 

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RELEVANCY SCORE 52

Please help!
All of the computers at my workplace run on Windows NT. Several people (including myself) have purchased PDA's (Sony Clies) that use a USB port. I have heard that Windows NT does not support USB. Is this true? We really need to be able to HotSync our PDA's at work. Are there any adaptors that would convert USB to a female serial connection? I couldn't find any. Can you think of any other way to get around this problem?
 

A:USB to serial port adaptor?

No: WinNT does not support USB, however, there are ways to get around it.

Start searching here: http://www.usbman.com/Win NT USB Guide.htm

Has information on the problem, and several solutions.
 

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RELEVANCY SCORE 52

OK maybe dumb and I should know this but if I use a serial port adapter and plug a ps2 mouse in it I can not get it to work shoudld it work? And how do i get it to if it should it is brand new.

Micro Innovations ps2 mouse

Thunder
 

A:PS2 Mouse in serial port?

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RELEVANCY SCORE 52

HI, I'm looking for the PCI Serial Port Driver for a Compaq 8000 Uktre Slim Desktop PC running Windows 7 64bit OS.It's properties being "PCI\VEN_8086&DEV-2E17&SUBSYS-3648103C&REV-03"

A:Re: PCI SERIAL PORT DRIVER

Hi: Here is the link to the W7 driver you need for that device... This package contains the Intel Local Management Service (LMS) and Serial-over-LAN (SOL) support for Intel Active Management Technology (AMT) for the supported desktop models and operating systems. This software is part of the Intel Digital Office Initiative. ftp://ftp.hp.com/pub/softpaq/sp45001-45500/sp45367.exe

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Whenever I try to access my serial port, my computer restarts. It does this for both com ports. Operating system is WIN2k. Anyone have any ideas what the problem could be?
 

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RELEVANCY SCORE 52

I have peripherals that attach via USB/serial cable. Each time I plug into a USB port, apparently XP is assigning another Com # to it. The peripheral software can only be configured up to Com10. The only USB ports in constant use are printer, mouse, and scanner. These are always connected. I can go into the device manager to access the ports and try to reassign a lower com # but the port is being reported as "in use" rendering it unavailable for anything. How do I clean these out or reset com #'s ? or stop the enumeration process ?
I have, in safe mode, tried to remove all USB ports, hub controllers and serial ports for the pc. I have also removed all instances of the drivers for the serial/usb ports as well as the software requiring it use. Upon restarting, all ports are reinstalled including the phantom ones. XP insists on remembering.......
Thanks in advance for any guidance here.......

 

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RELEVANCY SCORE 52

LENOVO 6072BKU ThinkCentre M57
System Serial Number: LKRGBVB
Enclosure Type: Desktop
Processor a Main Circuit Board b
2.20 gigahertz Intel Core2 Duo
64 kilobyte primary memory cache
2048 kilobyte secondary memory cache
64-bit ready
Multi-core (2 total)
Not hyper-threaded Board: LENOVO LENOVO
Bus Clock: 200 megahertz
BIOS: LENOVO 2RKT64AUS 11/24/2011
Windows 7 Home Premium (x64) (build 7600)
Install Language: English (United States)
System Locale: English (United States)
Installed: 11/4/2012 10:09:09 PM LENOVO 6072BKU ThinkCentre M57
System Serial Number: LKRGBVB
Enclosure Type: Desktop


I'm showing two issues in "Device Manager" (Other Devices)
1. "PCI Serial Port"
2. "Pci Simple Communications"
Don't know whether this is a Bios setting issue or driver issue!
I did make changes to the bios during a fresh install of Win 7, and of course, I didn't write down the original settings!
Everything seems to function alright, but I would like to get the issue notice cleaned up.

Thanks for any help here!

A:PCI Serial Port issues

I suggest running this from Microsoft. Just to check things are okay.
Windows 7 Upgrade Advisor - Download - Microsoft Windows

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Hello, I would like to buy a new hp notebook with serial port.Could you suggest me some  models ?also i need that the notebook could work with win 10 and win XP using virtual machinePROCESSOR i7  

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My serial mouse is dieing from hard work. I have no spare serial mice but several PS2 mice. When I connect a ps2 mouse to the serial port using a ps2 to serial adaptor, the mouse doesn't work. Rebooting doesn't help. Tried 3 ps2 mice - none work. Suggestions?
 

A:PS2 mouse on serial port

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RELEVANCY SCORE 52

Hi all, I'm quite desperate! In the middle of the sea with computer not working. I need to connect my laptop with windows 7 to a gps (Garmin 72H) to down?oad data. The Gps has a serial port and OFF COURSE my laptop not. I have a convertor COM-USB with driver but is not working. With XP I could create a virtual com port but I'm not able to do that with Windows7. When I connect the cable in Device manager in Other device a USB-serial controller is popping up with question mark. Usually there was an advanced bottom and from that I could create a virtual com. How can I do with Windows 7? Thank you very much for any suggestion.

A:GPS, serial port and windows 7

Marina, welcome to the forums
can you give details about the COM-USB converter? maybe we can help find the drivers, that seems to me would be the best solution?
Have you tried installing the ones you have in compatibility mode?

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RELEVANCY SCORE 52

I have just upgraded from Windows 7 to Windows 8.1 which is working fine except that I need to update the PCI Serial Port driver. When I click onto Device Manager under Other Devices it shows I am missing the PCI Serial Port driver as seen below."The drivers for this device are not installed. (Code 28)"Any help would be appreciated, Regards, RNPete

A:Missing PCI Serial Port

Hello RNPete, In device manager, right click on the missing device and select properties from the drop down box. In the window that is populated select the 'Details' tab at the top. Under Property Select 'Hardware Ids', and post the IDs that populate in the Value window here. This is will give me more access to exactly which driver is missing. Phil,   





I am an HP Employee

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RELEVANCY SCORE 52

Hi, I have a desktop HP COMPAQ 8000 ELITE CONVERTIBLE MINITOWER PC. On device manager the PCI Serial Port shows that driver is missing, also my Wireless Network Card is not working correctly, it do not find any domain, it shows the red X. The same with a Wireless USB.I connected the PC through a Lan cable with Internet, then i searched for updates, but there was not any update. When I select propertis shows the ( code 28 ) and the location ( PCI Bus 0 , device 3 , function 3 ). I have a Windows 7 Professional 64 bit.  Please can somebody help me to find the driver for this port ? Thank you 

A:PCI Serial Port Driver

Hi: You need this driver for the serial port. This package contains the Intel Local Management Service (LMS) and Serial-over-LAN (SOL) support for Intel Active Management Technology (AMT) for the supported desktop models and operating systems. This software is part of the Intel Digital Office Initiative. ftp://ftp.hp.com/pub/softpaq/sp45001-45500/sp45367.exe I don't see any other devices that need drivers from your screen shot, so unfortunately, I wouldn't be able to help you with why the wireless isn't working.

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RELEVANCY SCORE 52

I have a 9 pin female serial port loopback tester, but on the other end of it, it is also a 25 pin loopback tester. Whenever I run our serial test, it fails the handshake portion of the test consistently. I have other serial testers, and they work fine, but I need this one to work properly. Is the loopback pinned out differently, or can I jump some of the connections to make it work? Any help is appreciated!

TIA!
 

A:Serial Port testing

daves01902 said:

I have a 9 pin female serial port loopback tester, but on the other end of it, it is also a 25 pin loopback tester.Click to expand...

Are you trying to loopback test on the same connector or between two different connectors? You may have a loopback adapter/tester for testing between one serial port with a 9 pin plug and one with a 25 pin plug. I found a description of such a cable in some Sun Microsystems documentation here:

http://docs.sun.com/source/817-7665-10/AppendixA.html

That same documentation has information on wiring 9 pin and 25 pin plugs for loopback testing on the same port.
 

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