Date: 2003-10-10 00:53:28
> -----Original Message----- > From: ext Spiro Trikaliotis [mailto:firstname.lastname@example.org] > Sent: 09 October, 2003 20:46 > To: email@example.com > Subject: Re: (slightly OT:) Parallel port question > > > Well, the solution is simple: drive the port lines with a > source that can > > do three-state. > > Have it go hihg-impedance while turned on or reset, and let > it go out of > > high-impedance only when the parallel port is working as > input. [...] > > This is essentially what I proposed to him. Anyway, he does > not like the > idea to use software to protect the hardware. Think of this: > It could be > that some other program changes the line that is monitored, > which would > result in the erroneous state. I would be surprised to see the STROBE/ changing state independently of the data lines. The solution I proposed is as hardware as it ever gets! > > I remember having seen parallel ports which change their > value more than > once if the BIOS performs the POST. Frankly, I don't quite understand what you mean, I think I am missunderstanding you. Or maybe I'm understanding what you mean, but I don't see how this would be a problem.> Message was sent through the cbm-hackers mailing list
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