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Re: Inverted Pins
This is what I believed it to mean-- just needed some assurance... If
you're interested, I am trying to make an custom ISA card to capture
frames and control a robot..
Thank you very much
Steve Krattiger wrote:
> It's inverted by the hardware in every computer's parallel port.
> The output
> bits on the parallel port will output a logic '1' (+5V) if you write
> a '0' to
> the CONTROL register bits, and will output a logic '0' (0V) when you
> write '1'.
>
> The inverted inputs will read a '1' on the STATUS register if there
> is a '0'
> (0V) present on the parallel port pin, and will read a '0' on the
> register when
> a '1' (+5V) is present on the port pin.
>
> This has always been a "feature" of the parallel port.
>
> Steve Krattiger
>
> ______________________________ Reply Separator
> _________________________________
> Subject: Inverted Pins
> Author: Shailesh <ssp8288@megahertz.njit.edu> at SMTP-Gateway
> Date: 5/12/97 10:04 AM
>
> The color Qcam specs say that pins 1, 11, 14, and 17 are inverted by
>
> hardware. My question is : what hardware are they talking about?
> is it
> the Qcam itself or the hardware of the Parallel Port built into the
> computer?
>
> Thanx in advance,
> Shailesh
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