Re: Southbridges and interrupts

From	Jonathan de Boyne Pollard <J.deBoynePollard-newsgroups@NTLWorld.COM>
Newsgroups	comp.os.os2.apps, comp.os.os2.setup.misc, comp.sys.ibm.pc.hardware.chips
Subject	Re: Southbridges and interrupts
References	(9 earlier) <j21r1c$ah8$1@speranza.aioe.org> <IU.D20110812.T054838.P16927.Q0@J.de.Boyne.Pollard.localhost> <j24ngf$319$1@speranza.aioe.org> <IU.D20110815.T170901.P11689.Q0@J.de.Boyne.Pollard.localhost> <j2ce5f$pqv$1@speranza.aioe.org>
Message-ID	<IU.D20110816.T162535.P23192.Q0@J.de.Boyne.Pollard.localhost> (permalink)
Organization	virginmedia.com
Date	2011-08-16 17:24 +0100

Cross-posted to 3 groups.

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>>> The one PCI card I have installed is reported by pci.exe to use PCI
>>> bus#2, IRQ#3, INT#A
>>
>> Which rather puts the kibosh on what the manual says about interrupt
>> sharing, doesn't it? That's sharing with what is normally an ISA
>> interrupt for a UART.
>
> Only one UART here which is using IRQ#4

A W83627EHG has two UARTs, A and B.  Unless you have gone into the 
firmware SETUP utility and explicitly disabled UART B, which instructs 
the firmware to set the enable bit to zero in the device's configuration 
space during POST, you'll have two UARTs.

I've disabled almost all of the devices in the Super I/O chips on my 
test machines.  But this was not their default firmware configuration. 
It's also not the power-on default for the chip itself, before the 
firmware gets around to programming it.  The power-on default for the 
W83627EHG is for both UARTs to have the enable bit set to one.  The 
power-on default IRQ selection for UART B is IRQ #3.

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Re: doscall1 Jonathan de Boyne Pollard <J.deBoynePollard-newsgroups@NTLWorld.COM> - 2011-08-10 15:51 +0100
  Re: doscall1 "Dariusz Piatkowski" <dariusz@_NO-SPAM_mnsi.net> - 2011-08-10 18:51 +0000
    Re: doscall1 "Lars Erdmann" <lars.erdmann@arcor.de> - 2011-08-11 08:47 +0200
      Re: doscall1 "Dariusz Piatkowski" <dariusz@_NO-SPAM_mnsi.net> - 2011-08-17 21:38 +0000
    Re: Southbridges and interrupts Jonathan de Boyne Pollard <J.deBoynePollard-newsgroups@NTLWorld.COM> - 2011-08-12 12:51 +0100
    Re: OS2APIC.PSD Jonathan de Boyne Pollard <J.deBoynePollard-newsgroups@NTLWorld.COM> - 2011-08-12 14:02 +0100
      Re: OS2APIC.PSD "Dariusz Piatkowski" <dariusz@_NO-SPAM_mnsi.net> - 2011-08-17 21:35 +0000
        Re: OS2APIC.PSD Peter Brown <losepeteSPAM-ME-NOT@ntlworld.com> - 2011-08-18 01:10 +0100
          Re: OS2APIC.PSD "Dariusz Piatkowski" <dariusz@_NO-SPAM_mnsi.net> - 2011-08-18 01:04 +0000
            Re: OS2APIC.PSD "Lars Erdmann" <lars.erdmann@arcor.de> - 2011-08-18 11:07 +0200
              Re: OS2APIC.PSD "Dariusz Piatkowski" <dariusz@_NO-SPAM_mnsi.net> - 2011-08-19 02:26 +0000
              Re: OS2APIC.PSD "Rich Walsh" <spamyourself@127.0.0.1> - 2011-08-19 04:10 +0000
          Re: OS2APIC.PSD "Lars Erdmann" <lars.erdmann@arcor.de> - 2011-08-18 11:05 +0200
            Re: OS2APIC.PSD Peter Brown <losepeteSPAM-ME-NOT@ntlworld.com> - 2011-08-19 14:49 +0100
              Re: OS2APIC.PSD "Dariusz Piatkowski" <dariusz@_NO-SPAM_mnsi.net> - 2011-08-20 03:18 +0000
                Re: OS2APIC.PSD Peter Brown <losepeteSPAM-ME-NOT@ntlworld.com> - 2011-08-20 15:05 +0100
                Re: OS2APIC.PSD "Dariusz Piatkowski" <dariusz@_NO-SPAM_mnsi.net> - 2011-08-20 17:49 +0000
              Re: ACPI.PSD Jonathan de Boyne Pollard <J.deBoynePollard-newsgroups@NTLWorld.COM> - 2011-08-22 11:16 +0100
            Re: OS2APIC.PSD Jonathan de Boyne Pollard <J.deBoynePollard-newsgroups@NTLWorld.COM> - 2011-08-22 11:06 +0100
        Re: OS2APIC.PSD Jonathan de Boyne Pollard <J.deBoynePollard-newsgroups@NTLWorld.COM> - 2011-08-19 12:24 +0100
          Re: OS2APIC.PSD "Dariusz Piatkowski" <dariusz@_NO-SPAM_mnsi.net> - 2011-08-19 20:48 +0000
            Re: OS2APIC.PSD Dave Yeo <dave.r.yeo@gmail.com> - 2011-08-19 18:09 -0700
              Re: OS2APIC.PSD "Dariusz Piatkowski" <dariusz@_NO-SPAM_mnsi.net> - 2011-08-20 03:14 +0000
            Re: OS2APIC.PSD Jonathan de Boyne Pollard <J.deBoynePollard-newsgroups@NTLWorld.COM> - 2011-08-21 13:27 +0100
          Re: OS2APIC.PSD "Lars Erdmann" <lars.erdmann@arcor.de> - 2011-09-05 18:59 +0200
    Re: doscall1 "Trevor Hemsley" <Trevor.Hemsley@mytrousers.ntlworld.com> - 2011-08-12 13:57 -0500
      Re: os2apic Jonathan de Boyne Pollard <J.deBoynePollard-newsgroups@NTLWorld.COM> - 2011-08-15 16:17 +0100
    Re: OS2APIC.PSD Jonathan de Boyne Pollard <J.deBoynePollard-newsgroups@NTLWorld.COM> - 2011-08-15 16:34 +0100
      Re: OS2APIC.PSD "Dariusz Piatkowski" <dariusz@_NO-SPAM_mnsi.net> - 2011-08-17 21:32 +0000
  Re: doscall1 Dave Yeo <dave.r.yeo@gmail.com> - 2011-08-11 07:54 -0700
    Re: doscall1 Jonathan de Boyne Pollard <J.deBoynePollard-newsgroups@NTLWorld.COM> - 2011-08-11 18:29 +0100
      Re: doscall1 Dave Yeo <dave.r.yeo@gmail.com> - 2011-08-11 17:10 -0700
        Re: Southbridges and interrupts Jonathan de Boyne Pollard <J.deBoynePollard-newsgroups@NTLWorld.COM> - 2011-08-12 06:47 +0100
          Re: Southbridges and interrupts Dave Yeo <dave.r.yeo@gmail.com> - 2011-08-12 19:28 -0700
            Re: Southbridges and interrupts Jonathan de Boyne Pollard <J.deBoynePollard-newsgroups@NTLWorld.COM> - 2011-08-15 18:07 +0100
              Re: Southbridges and interrupts Dave Yeo <dave.r.yeo@gmail.com> - 2011-08-15 17:38 -0700
                Re: Southbridges and interrupts Jonathan de Boyne Pollard <J.deBoynePollard-newsgroups@NTLWorld.COM> - 2011-08-16 16:58 +0100
                Re: Southbridges and interrupts Jonathan de Boyne Pollard <J.deBoynePollard-newsgroups@NTLWorld.COM> - 2011-08-16 17:24 +0100
                Re: Southbridges and interrupts Dave Yeo <dave.r.yeo@gmail.com> - 2011-08-16 18:39 -0700
                Re: Southbridges and interrupts Jonathan de Boyne Pollard <J.deBoynePollard-newsgroups@NTLWorld.COM> - 2011-08-17 10:36 +0100
          Re: Southbridges and interrupts Dave Yeo <dave.r.yeo@gmail.com> - 2011-08-12 19:52 -0700
            Re: Southbridges and interrupts Jonathan de Boyne Pollard <J.deBoynePollard-newsgroups@NTLWorld.COM> - 2011-08-15 17:10 +0100

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