Date: Fri, 30 Oct 1998 11:58:49 -0600 (CST) From: Avalon Books <avalon@advicom.net> To: freebsd-questions@FreeBSD.ORG Subject: 16C650 setup questions... Message-ID: <Pine.BSF.4.05.9810301144560.9681-100000@vespucci.advicom.net>
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I have gotten a number of conflicting and/or overly vague answers to this question, so I thought I'd ask the experts (and yes, I have already searched the mail archives for this data)... How do I properly setup an ST16C650-based port under FreeBSD? The card in question is a Boca Research IO652, which is a plain-jane dual ST16C650-based I/O card with a jumper-based hardware-only setup (my favorite). One of the ports is disabled (it isn't needed at the moment), and the other is set for 0x3E8, irq 5 (and no, I don't have a sound card in this machine). I'm currently running FBSD 2.2.6R. There are no device conflicts at the address or interrupt level as far as I can determine. I am using the following device setup in my kernel config: device sio2 at isa? port "IO_COM3" tty flags 0x20000 irq 5 siointr Which compiles ok, and runs ok (up to a max rate of 115.2 kbaud), but the port is identified as a 16550 (or compatible) by dmesg. I *really* need this port to run at 230.4 kbaud (the card is capable of a max of 460.8 kbaud), and having the kernel correctly would be nice... I checked /usr/src/sys/i386/isa/sio.c, and I found a reference for detecting the 16C650 and its shadow registers (when cfcr == 0xff). Wonderful! How do I use it? I tried changing the "#if 0" at line 864 to "# if 1" just to test, but this had no apparent effect (but then again, I'm not a systems programmer). What mods (if any) do I need to make to sio.c (and/or sio.h) to make this port work the way I want it to? And what changes (if any) to I need to make to my kernel config concerning this device? --Rick Pelletier Lead Tech, DCSI Hunstville 256.536.4585 P.S. I think I'll be taking up C programming as a hobby--right after I have my therapist gives me more potent anti-psychotics (grin)... To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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