Messages in this thread | | | Date | Thu, 22 Aug 1996 21:27:41 -0400 | From | "Darrin R. Smith" <> | Subject | Re: Problems with |
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Theodore Y. Ts'o wrote: > > Date: Tue, 06 Aug 1996 19:42:55 -0400 > From: "Darrin R. Smith" <drsmith@eznet.net> > > I am having some trouble with a custom serial port setup on > my machine. Specifically, I have a mouse on cua0(com1), modem on > cua1(com2), and a Sparc IPC connected to cua3(com4) for use as the > console. The setup is as follows: > > TTY Port IRQ UART > cua0 0x3f8 4 16550A > cua1 0x2f8 3 16550A > cua3 0x2e8 5 16550A > > The problem is that new characters arriving on cua3 are not > generating any interrupts as can be seen in /proc/interrupts: > > I have been setting the parameters on this port using setserial > for quite a while and I can't seem to get it to work. I also recompiled > minicom suspecting that something might have broke between 1.2.13 and > now, but it didn't have any effect. > > It sounds like you didn't set the dip switch settings on your COM4 board > to actually use IRQ 5. You realize that you have to change more than > just the settiongs in rc.serial and setserial, right? You actually have > to configure the hardware to use IRQ 5..... > > - Ted
ok, my last post on this apparently didn't make it to the list for some reason -- so here is the latest status again.
I did a double-check on the hardware this last weekend. Nothing is out of order there -- No devices conflict, the serial port is setup properly(this is a DTC 2278E board in case anyone wants to know).
I tried re-compiling the kernel with the proper values set in serial.c, and I stopped using the setserial utility to set the parameters. The kernel prints out the right information on bootup, but the same problem persists. Using setserial doesn't appear to make a difference in this re-compiled kernel, either.
At this point, I am open to more suggestions. Off the top of my head, I would probably say that maybe we aren't initializing the card properly, or we've found a bug in the DTC 2278 hardware, but I would also be willing to admit I could be on shaky ground with this diagnosis(since the mouse on com1 via the DTC works fine). TIA.
--Darrin -- FAQ Suggestions: Q: I upgraded without reading release notes, now my system's broke - why? A: What the @!#* did you expect? (this assumes that someone reads the faq, of course ;)
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