Re: using 6 serial ports
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On Tue, 10 Aug 1999, Nico De Ranter wrote:
> I added a board with 4 serial ports to my PC. I can access the
> first two serial ports on that board but I do not succeed in connecting
> to the other 2 ports. I added support for more then 4 serial ports
> to the kernel and I added some setserial lines to /etc/rc.boot/0setserial
> but it still doesn't seem to work. When I boot Linux I get a message
> Serial driver version 4.27 with MANY_PORTS SHARE_IRQ enabled
> ttyS00 at 0x03f8 (irq = 4) is a 16550A
> ttyS01 at 0x02f8 (irq = 3) is a 16550A
> ttyS02 at 0x03e8 (irq = 4) is a 16550A
> ttyS03 at 0x02e8 (irq = 3) is a 16550A
> Should I do anything special to use the next 2 serial ports? I couldn't
> find anything in the serial-HOWTO.
- From what I recall in configuring a 2-port serial board in one of my
systems is that one of the higher ports has a port conflict with one of
the IDE channels. Double-check your settings, then you'd probably want to
add lines in your 0setserial (assuming slink) to set up ttyS04 and ttyS05.
Oh, and if you have share_irq enabled in the serial driver, you can
probably configure all the ports on your board to use the same interrupt.
Worked for my board (set it for S1 and S3, set my MB's for S0 and S2) and
it worked like a charm, can even mouseand serial console on the same
interrupt. But you might have a board that it can't handle.
Shouldn't damage anything if you do try it, but I wouldn't know for sure.
It isn't my machine. :>
- -- Ferret no baka
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