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Re: Inverted Pins
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
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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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