Date: Wed, 15 Dec 1999 19:21:55 -0800 From: Andy Sparrow <andy@geek4food.org> To: "Toby J. Swanson" <toby@milkyway.org> Cc: Andy Sparrow <andy@geek4food.org>, questions@freebsd.org, tjswanson@tva.gov Subject: Re: high speed serial card support Message-ID: <19991215192155.A54152@mega.geek4food.org> In-Reply-To: <002301bf4704$e8013de0$13c2f1cd@milkyway.org> References: <8C8DCBC7A064D01181F30000F8014E27C2EAB6@knxnorois1b.noh.tva.gov> <19991207084950.A79816@mega.geek4food.org> <002301bf4704$e8013de0$13c2f1cd@milkyway.org>
next in thread | previous in thread | raw e-mail | index | archive | help
On Wed, Dec 15, 1999 at 09:01:15AM -0500, Toby J. Swanson wrote: > > On Tue, Dec 07, 1999 at 08:39:05AM -0500, Swanson, Toby J. wrote: > > > Does one need to do anything special to enable FreeBSD to communicate > > > faster than 112,500 bps with a high speed serial card? I'm considering > > > installing a LavaPort 650 to use with my ISDN terminal adapter. The > Lava > > > people say once installed it becomes the next available comm port. They > > > have a DOS utility that will report its I/O address. It looks like one > can > > > simply compile a kernel that supports siox at the reported address and > it > > > should work. > > > > Hi. > > > > I used to use an SIIG high-speed serial card with the Startech > > 16650 UART to drive my ISDN TA. There's jumpers on the card to > > overclock the UART 1x, 2x and 4x (for 430kbs). > > > > Note that you need a reasonably late version of FreeBSD to recognise > > the 16650 and enable the larger FIFO (also need to set some flags, > > IIRC). > > > > Worked great, modulo a few "silo overflow" messages. I ended up > > running the card at the 2x setting (for 230kbs), as my ISP didn't > > offer STAC compression anyway. > > > > HTH. > > > > AS > > > I finally got a LavaPort 650 (single port 16650 UART), installed it in an > Intel T440BX server mother board, Pentium II 400 Mhz, 128Mb RAM, > FreeBSD 3.3. I modified the isa.h file to reflect the card's correct I/O > address for COM3, made the corresponding entries in the kernel > configuration file for COM3 with the correct IRQ and flags 0x20000 > entry. The board is recognized on boot up but when I > "cu -l /dev/cuaa0 -s 1200" (or any speed) the whole system stops dead. > No multi screens, no breaking out, can't ping the machine. Only a front > panel reset starts the machine again. Any thoughts on the cause? > > I'm not sure what your IIRC comment is referring to. I was referring to the 0x20000 flags necessary to enable 16650 support in the sio driver, without which it won't take advantage of the special features (like the larger FIFO). The overclocked speed (on my card anyway) is entirely transparent to FreeBSD, which simply opens the port at the specified speed, and the hardware multiplier takes care of bumping the speed. Personally, I'd be inclined to leave the source alone and use the userconfig interface to enable sio2/COM3 and set the address. If the address doesn't change, you get to play with the Forth stuff to add commands in '/boot/kernel.conf' so you don't need to do it every time you re-start. Does the card respond to Plug'n'Pray probes? Did you cold-boot or warm-boot the machine after getting the address from DOS? Cheers, AS To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?19991215192155.A54152>