Date: Tue, 16 Jul 1996 17:28:43 -0700 (PDT) From: Jim Dennis <jim@starshine.org> To: ben@stuyts.nl Cc: questions@FreeBSD.ORG Subject: Re: 2.1.5R: UUCP errors, no flow control? Message-ID: <199607170028.RAA00935@starshine> In-Reply-To: <9607162159.AA25913@daneel.stuyts.nl> from "Ben Stuyts" at Jul 16, 96 11:59:37 pm
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> > On Mon, 15 Jul 1996, Doug White wrote: > > > On Tue, 16 Jul 1996, Ben Stuyts wrote: > > > > First of all, I am new to FreeBSD, but am very impressed with what I've seen > > so far. I have a little problem though: I am setting up a system with 2.1.5R, > > and I can't get UUCP to work properly. > Well, I checked both today, even tried two other modems (another ZyXEL 1496E+ > and a 2864), but still no good. > > Finally I disabled the two rs232 ports in the motherboard's bios, and put in > an old isa-card with two 16450's and an LPT on it. Voila, it works... The > funny thing is, I still don't see any flow control, but the errors are gone. > Strange, huh? Could it be that the 16550 drivers are buggy? I guess I could > try building a kernel with the 16550 features disabled, or is there an easier > way to check this? > > Now, I wanted those additional ports anyway, but I read somewhere that that's > not possible due to the pc's com port irq sharing, right? > Ben It is possible to have have 4 "normal" (conventional) COM ports on a PC. Yes, by default, these are arranged with an IRQ conflict. However that is a simple matter to fix (with most good I/O cards). For example in my 386 (from which I type this) I'm using a QuickPath "Portfolio" multi-function I/O card. In addition to two IDE channels, two PRN ports, and a floppy controller and a game port, this has four high speed (16550AFN) serial ports with individually configurable I/O port addresses and IRQ's. I suggest IRQ 5 for COM3 and IRQ 9, 10, 11, or 12 for COM4. Naturally it's also possible to get specialized serial hardware (such as the Cyclades, RocketPort, Digi PC/8, etc). I've connected 128 serial ports on a single system (using intelligent DigiBoard hardware with TSX-32/TSX-BBS software). I know that the Cyclades people agressively market to Unix (Linux and FreeBSD) users and provide plenty of support to people who write the drivers. Jim Dennis, Starshine Technical Services,
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