vmware bochs osr5 under linux

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From: Bela Lubkin <belal@caldera.com>
Subject: "wd" driver, Re: INT13 function FAh during boot?
Date: Thu, 25 Apr 2002 20:09:38 GMT
References: <200204251557.aa21702@xenitec.xenitec.on.ca> 

Carl Sopchak wrote:

> Bela Lubkin <belal@caldera.com> wrote in message news:<20020425032045.D9014@mammoth.ca.caldera.com>...
> > Well, that's pretty much the same area that trips up VMWare.  The OSR5
> > IDE driver ("wd") has rather peculiar code to detect IDE controllers and
> > drives.  The driver dates back to the WD1010 (full-length 16-bit ISA
> > ST506 controller), and possibly earlier than that.  It "knows" about a
> > lot of ancient controller quirks and takes steps to avoid them.  These
> > steps apparently still work with the latest in "real" IDE hardware, but
> > not with most emulation environments.
> 
> Are these steps documented somewhere?  If bochs knew what they were,
> perhaps they can accommodate them...

I'm afraid they're documented only in the source.  And OpenServer is
still a long long way from open source.

I was going to say that the "wd" driver source was MicroSoft encumbered,
so that it would likely _never_ get to be public.  But I'm wrong, it
appears to have only SCO/Caldera copyright notices.  So that means it
would only be a few months of internal red tape to find out whether we
could make it public...  :-(

Two other things to try.  One is, add the boot string "wd.debug=udma" to
see if that provokes any output.  Another is, see whether bochs will
emulate a SCSI disk rather than IDE.  I say that because VMWare
apparently has such a mode, and one of the people flailing against
VMWare had some success down that path.  The emulator authors will have
chosen to emulate a simple SCSI host adapter, which means the amount of
driver code they'll have to satisfy should be relatively small.

>Bela<
 

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