Date: Sun, 11 Jan 1998 19:41:20 -0500 From: Charlie Root <root@scsn.net> To: John Kelly <jak@cetlink.net> Cc: dmaddox@scsn.net, hackers@FreeBSD.ORG Subject: Re: 16650 Support(?) Message-ID: <19980111194120.34679@scsn.net> In-Reply-To: <34bf6bef.3609890@mail.cetlink.net>; from John Kelly on Mon, Jan 12, 1998 at 01:11:32AM %2B0000 References: <19980111150619.48677@scsn.net> <34b95e60.140553@mail.cetlink.net> <34B957B6.AEC4CDAF@scsn.net> <34bf6bef.3609890@mail.cetlink.net>
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On Mon, Jan 12, 1998 at 01:11:32AM +0000, John Kelly wrote: > On Sun, 11 Jan 1998 18:37:26 -0500, dmaddox@scsn.net (Donald J. > Maddox) wrote: > > > Hmmm... I originally configured it as a basic 16550, since > >sio apparently doesn't have any support for >115.2Kbps anyway, but > >even then it looked like the baud rate just couldn't be changed > >from 9600. I suppose it's possible that the LavaPort's interface > >is non-standard(?) Anybody have any experience with this card? > > A 650 is a 650 no matter what card it's on. All programming of the > registers takes place on the UART, not the card. Perhaps you are > doing something else wrong. > > I have 650's on a Byterunner card working with my ISDN at 230k. SIO > programs the UART with a value of "1" which is 115,200 for a 1x clock, > but 230,400 for a 2x clock. The clock is controlled by a jumper on > the card and SIO doesn't care. It only cares about writing the value > "1" to the appropriate UART register. > > There is more to the story because of the clock selection bit in the > 650 UART, but the details should be irrelevant for your purposes. Interesting information... This card doesn't have a jumper for the clockspeed, though. The only jumpers on the board are for setting the IRQ and COM port. The clock is, as far as I can tell, fixed at 4x normal 16550 speed (It supports baud rates up to 430,800bps). Maybe the 4x clock is the problem?
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