Date: Thu, 14 Jun 2001 12:48:24 -0700 (PDT) From: Matt Dillon <dillon@earth.backplane.com> To: David Miller <dmiller@sparks.net> Cc: freebsd-stable@FreeBSD.ORG Subject: Re: serial port stuck at 9600 Message-ID: <200106141948.f5EJmOe28264@earth.backplane.com> References: <Pine.BSF.4.21.0106121330250.59495-100000@search.sparks.net>
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:configured with the com port on "auto". When set to be com1 at IRQ 4 it :ceased to function at all, matching the other two systems. : :I've tracked the problem down to the port (ttyd0) not having DCD :input. Using cuaa0 worked fine, so the serial port is OK. : :I checked the cable, and DCD is wired straight through (pin 1 on the 9 pin :ports), so it's not the cable. That is the cable... when building a null modem cable DTR is supposed to be wired to DCD and vise versa. It should be something like: DTR -> DCD DTR -> DSR DCD <- DTR DSR <- DTR RTS -> CTS CTS <- RTS TX -> RX RX <- TX SGND<-> SGND -Matt :I'm connecting with a serial port on another PC running freebsd and "cu -l :/dev/cuaa0 or cu -l /dev/ttyd0". In both cases I get a connection :message, but the remote end never responds. I slapped a breakout box on :the end of the cable and confirmed that DCD is not being raised by cu. : :That means my question is: "When using a FreeBSD system as a console for :another system, how do I raise DCD in order to establish a connection?" : :Clues welcomed:) : :--- David To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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