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I need an adapter for USB to serial port.

Posted on 2003-11-02
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I bought a drawing tablet which is USB, but my laptop is old and does not have a USB port. It does have a serial and a parallel port though. I need an adapter, does such a thing exist?, and if so where can I order one on-line? I'm trying to get this thing to work for school so please help.
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Question by:mrcheshircat
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by:CrazyOne
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by:CrazyOne
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even with this it may not work. Some devices are made to only run on USB.
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Kyle Schroeder earned 500 total points
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CrazyOne:  I think you misunderstood....mrcheshircat needs what I believe is a non-existant cable: something to plug into a parallel/serial port that has a USB port on the other end (a parallel-USB adapter vs. a USB-parallel adapter for plugging a parallel printer into a USB port).

mrcheshircat:  The cable you want does not exist, or at least I would be *EXTREMELY* suprised to find such a device.   I think a better option for you in this case (assuming you don't want to update your laptop, which BTW much VERY old to not have USB at all!) would be a USB PCMCIA card, such as:
http://www.cdw.com/shop/products/default.aspx?EDC=290691
http://www.siig.com/product.asp?partnum=JU-PCM222&category=USB
http://www.buy.com/retail/product.asp?sku=10348695&hdwt=30701&loc=101&sp=1

Unfortunately, these products probably (I known the SIIG card does) require a CARDBUS PCMCIA slot, which if your laptop doesn't have USB, I'm fairly certain it won't have Cardbus support either.  What model is your laptop?

-dog*

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by:kronostm
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Dogztar said <<I would be *EXTREMELY* suprised to find such a device>>.
I tottaly agree.
Why?
Because USB devices get power using the USB port, but the serial/parallel ports are unable to provide a high current. (When I say "high" I mean as the USB port provides)

so.....mrcheshircat ... that adapter is impossible to be designed for that simple reason.
Sorry for disapointing you...anyway dog* suggested an alternative for you (maybe the only one).

(`'·.¸(`'·.¸ ~ ¸.·'´)¸.·'´)
«´.¸¸KRONOS¸¸.·`»
(¸.·'´(¸.·'´ ~ `'·.¸)`'·.¸)
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by:Kyle Schroeder
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Quite the sig there kronostm :)
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by:mrcheshircat
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Thanks, dogztar. I think the PCMCIA route will work, but just in case, my laptop is an
IBM TP380ed
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by:Kyle Schroeder
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Well, you'll have to try to find a USB 1.1 card, as it looks like all the USB 2.0 cards I can find are Cardbus.  IBM's documentation about your system says:

PCMCIA slots  2 Type I or 2 Type II or 1 Type III / Zoomed Video support in lower slot /PCMCIA 2.1 compatible / PC Card Standard 95 / Cirrus Logic CL-PD6729 (PCI)

Its hard to say though.  This page: http://lists.insecure.org/lists/linux-kernel/2000/Feb/1272.html has some information that seems to indicate Cardbus may work with your PC card slots.  Your best bet will probably be to buy a USB 2.0 card from a local store that you can return it to with no hassles if it won't detect.  But maybe you can find an old USB 1.1 PCMCIA card that is 2.1 compatible...

Or its time for a new laptop!  What is that system, a Pentium-166MMX?

-dog*
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