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Re: PCI-enum and SouthBridge behaviour...

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Rod Pemberton wrote:
 
>> when I boot from an IDE-connected drive and use BIOS calls like 
>> int11/12/14/17 (rather old and useless today anyway) I see 
>> much more PCI-devices (EHCI-USB, onboard SOUND and Bridges) 
>> than what I see if I boot from an SATA-drive with only a few 
>> BIOS calls (int15_e820,int10_0003,int13_4xxx).
 
> Is the SATA drive being emulated as IDE by BIOS?  Or, is this SATA
> drive being used as native SATA?  If you're using BIOS calls, would
> that mean the SATA drive is being emulated as IDE?

SATA hosts can be set to work in "combined mode" (not emulated).
this is also known as SATA-native-mode + IDE-like port settings.  

> E.g., I can boot SATA drive emulated as IDE into DOS, but I can't
> access other SATA drives from DOS.  I have to load SATA drivers in DOS
> to access other SATA drives.  The SATA boot drive is being emulated as
> an IDE drive by BIOS, but other drives aren't.

That's right, DOS tools assume ports 01f0/0170 base ports while 
SATA connected drives reside somewhere else (inknown by DOS-tools)  
 .
> Could there be a similar issue or related issue here?  E.g., for an IDE
> boot maybe the BIOS exposes other devices it may be emulating?

I'm not sure yet about it, but the fact that I dont see the LPC-bridge 
when I boot from an SATA drive, tells me that the BIOS work different. 

__
wolfgang 

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Thread

PCI-enum and SouthBridge behaviour... "wolfgang kern" <nowhere@never.at> - 2016-07-22 21:53 +0200
  Re: PCI-enum and SouthBridge behaviour... James Harris <james.harris.1@gmail.com> - 2016-07-24 16:52 +0100
    Re: PCI-enum and SouthBridge behaviour... "wolfgang kern" <nowhere@never.at> - 2016-07-24 19:54 +0200
      Re: PCI-enum and SouthBridge behaviour... James Harris <james.harris.1@gmail.com> - 2016-07-25 07:07 +0100
        Re: PCI-enum and SouthBridge behaviour... "wolfgang kern" <nowhere@never.at> - 2016-07-25 11:04 +0200
          Re: PCI-enum and SouthBridge behaviour... James Harris <james.harris.1@gmail.com> - 2016-07-25 10:30 +0100
            Re: PCI-enum and SouthBridge behaviour... "wolfgang kern" <nowhere@never.at> - 2016-07-25 14:06 +0200
              Re: PCI-enum and SouthBridge behaviour... James Harris <james.harris.1@gmail.com> - 2016-07-25 13:16 +0100
                Re: PCI-enum and SouthBridge behaviour... "wolfgang kern" <nowhere@never.at> - 2016-07-26 13:09 +0200
                Re: PCI-enum and SouthBridge behaviour... James Harris <james.harris.1@gmail.com> - 2016-07-26 15:14 +0100
          Re: PCI-enum and SouthBridge behaviour... Rod Pemberton <NoHaveNotOne@bcczxcfrze.cam> - 2016-07-25 21:55 -0400
            Re: PCI-enum and SouthBridge behaviour... "wolfgang kern" <nowhere@never.at> - 2016-07-26 12:48 +0200
  Re: PCI-enum and SouthBridge behaviour... Rod Pemberton <NoHaveNotOne@bcczxcfrze.cam> - 2016-07-26 08:18 -0400
    Re: PCI-enum and SouthBridge behaviour... "wolfgang kern" <nowhere@never.at> - 2016-07-26 20:11 +0200
  Re: PCI-enum and SouthBridge behaviour... "wolfgang kern" <nowhere@never.at> - 2016-07-28 18:53 +0200
    Re: PCI-enum and SouthBridge behaviour... "wolfgang kern" <nowhere@never.at> - 2016-07-29 19:47 +0200
      Re: PCI-enum and SouthBridge behaviour... Rod Pemberton <NoHaveNotOne@zxdehrnyya.cam> - 2016-07-29 17:44 -0400
        Re: PCI-enum and SouthBridge behaviour... "wolfgang kern" <nowhere@never.at> - 2016-07-30 09:44 +0200
    Re: PCI-enum and SouthBridge behaviour... James Harris <james.harris.1@gmail.com> - 2016-07-30 12:55 +0100
      Re: PCI-enum and SouthBridge behaviour... "wolfgang kern" <nowhere@never.at> - 2016-07-30 19:40 +0200
        Re: PCI-enum and SouthBridge behaviour... James Harris <james.harris.1@gmail.com> - 2016-07-30 19:08 +0100

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