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Old 11-02-10, 09:01
hayes7457 hayes7457 is offline
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Talking Convert a VGA PORT to become a COMM PORT

Hey all

hopefully someone can assist, I am using Harris Radios to connect to HP laptops, I require the Comm Port on the Radio to connect to the VGA Port on the laptop.

The laptop has no serial port and I am led to believe the equipment has been connected via the VGA port in the past.

My question is can I configure the VGA port to act as a serial port and pass raw data, if so what is the commands do I need to enter and where do I input them. Hopefully someone can help

Thanks

Paul
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Old 11-02-10, 09:17
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foogoo foogoo is offline
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Default Re: Convert a VGA PORT to become a COMM PORT

I've never heard of this. If you don't have a COM port you can get a USB to COM port adapter.
$10 at Buy.com
http://www.buy.com/prod/usb-2-0-to-9...213271775.html
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Old 11-02-10, 09:39
hayes7457 hayes7457 is offline
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Default Re: Convert a VGA PORT to become a COMM PORT

thx Foogoo

I know that usb to vga adapters are available, I am unsure if this can be done but would like to ask the forum if anyone has any ideas I did find online a command line to input into the Kernel which would enable serial data traffic over a vga port however I have not been able to find that information again.

Can a VGA port become a Serial Port??
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Old 11-02-10, 13:33
jlphlp jlphlp is offline
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Default Re: Convert a VGA PORT to become a COMM PORT

Hi Hayes,

FooGoo is correct. In addition, the VGA port and the Serial Port are two different animals. VGA is a parallel port with only a few in/out lines. Serial has the in/out and common on 3 leads. An adaptor would probably not be found anywhere (?). FooGoo's suggestion for a PCI board would be a very easy solution. You may not find a new one but EBay or a Google search should turn up a good used one.

Good Luck, Jim
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Old 11-03-10, 07:52
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Default Re: Convert a VGA PORT to become a COMM PORT

VGA can only be used to transmitting graphics. COM ports use different voltages, pins, and layout. I do not understand how any data equipment can be connected to a port that is routed directly to the graphics card.

You would be much better off following the advice of foogoo and getting an adapter.
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Old 11-03-10, 09:10
jlphlp jlphlp is offline
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Default Re: Convert a VGA PORT to become a COMM PORT

Hi Collins,

I'm sure that if it was really necessary an adaptor could be constructed but it would be even more complicated than a PCI card. Your advice and FooGoo's is still the best.

Jim
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Old 11-04-10, 17:23
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Default Re: Convert a VGA PORT to become a COMM PORT

Quote:
Originally Posted by jlphlp View Post
Hi Collins,

I'm sure that if it was really necessary an adaptor could be constructed but it would be even more complicated than a PCI card. Your advice and FooGoo's is still the best.

Jim
You would have to do a lot of programming as well to get the graphics card to route the data through itself from the software to the port, not to mention this would probably also kill off graphics for the time you needed the adapter.
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Old 11-06-10, 10:02
jlphlp jlphlp is offline
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Default Re: Convert a VGA PORT to become a COMM PORT

Hi again Collins,

AMEN!

Jim
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