How to enable EPP on PCI parallel port card

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14 years 11 months ago #14901 by andypugh
PCW wrote:

So if your PCI parallel port is a 3.3V one it may simply not work whatever you do

In that case, would a pull-up (from the USB 5V, maybe) be a solution?

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14 years 11 months ago #14902 by PCW
Possibly
It has been speculated before that on some parallel port chipsets setting different modes
changes some I/O pins from open drain with pullups to push pull. If this is what is happening on
/INIT = G540 chargepump, then yes a stiffer pullup (say 470 Ohms or so) may fix the problem

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10 years 8 months ago #70282 by Boltonbrass
I am having a hard time determining if my par port card is my homing problem. Any suggestions.

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