I'm bummed out, pretty much all of our computers here lack parallel ports. I have an EETools ChipMax programming tool that has one of the old-school Centronics connectors on the back. I figured that someone must make a USB to LPT adapter. Sure enough, I found one from iogear, the GUC1284B that is a USB to Parallel Printer cable. Note the boldface on the Printer. It must connect to a printer -- it isn't some generic USB to parallel interface, unfortunately.

Does anyone here know of an adapter that works for parallel devices that aren't printers? I'd hate to have to buy a USB version of the ChipMax when I don't need to use it very much.


It may be that the interface is only uni-directional, meaning it is meant to send information to the printer, but not get anything back. If your device needs bi-directional communication, you may be out of luck.

  • good question... I'll need to research this, but I'm starting to think that I had better make sure I always have one PC with a parallel port, just in case. :( – Dave May 7 '10 at 20:41
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    As long as you have a PC that will accept it, PCI parallel port controller cards are less than $20. – KeithB May 9 '10 at 20:16
  • I'll have to look around for PCIe... thanks for the suggestion! – Dave May 11 '10 at 13:14

Assuming the USB adaptor actually provides a full pinout for the printer port, and the GUC1284B expects nothing unusual, you could probably just buy, or buy parts and make if you can't find one pre-assembled, a female-IEEE1284-to->parallel cable. That might work.

In fact if you can find a IEEE1284 gender-changer you could probably use that with standard printer cable.

  • I'm not sure I understand you. I need a USB to generic parallel interface. The issue isn't centronics to DB25... – Dave May 7 '10 at 20:40

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