vmware bochs osr5 under linux

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From: carl.sopchak@cegis123.com (Carl Sopchak)
Subject: Re: INT13 function FAh during boot?
Date: 30 Apr 2002 12:35:12 -0700
References: <200204271534.aa00201@xenitec.xenitec.on.ca> <20020427123740.A15678@mammoth.ca.caldera.com> 

Bela,

First, some info to help based on your last two posts:

bochs implements ATA-2 for the hd, and ATAPI-4 for the CD.  The specs
for these can be found at http://www.t13.org (page down some...).  The
ATA-2 spec is actually a draft (never to be completed), so you can
just download it from that page.  ATAPI-4 is completed, so it costs
$$, but you can download the ATAPI-6 draft...  Also, you can get the
ATAPI CD-ROM Packet extension info at
http://akrip.sourceforge.net/8020r26.pdf.  This describes the
"subcommands" of the ATA Packet command (basically SCSI commands
embedded in the ATA spec).  As the ATA-2 spec states, writes to port
0x3f6 is the Device Control Register, and reads from 0x3f6 is the
Alternate Status Register, so, yes, how it is used is *very much*
dependant on prior I/O to the drive.  After looking at the specs
briefly, I can see why the code could be quite bewildering -
especially if it wasn't *very* well commented!

Here's what I've done so far:

- I added EIP to the general log entry format.  Future logs will show
this...
- I changed the panic for the start disk & read TOC command to a nop,
although I think, to "meet the spec", I should have implemented a read
of the TOC on the disk...  However, SCO didn't seem to mind not
getting the TOC.  Maybe I'll get to that some day (when necessary
<grin>)...


Now, where we're at:

During the install, I got the message "WARNING: wd0: timeout on fixed
disk dev 1/0" several times.  Since it is referring to the second IDE
controller, which doesn't exist, I guess it's safe to ignore...  (Why
does it keep trying to do anything with it?  The kernel never
recognised a second controller at startup...)

Later in the install (just before and during the Installation Progress
screen [with progress bar]), I also got a whole lot of "WARNING: wd0:
timeout on fixed disk dev 1/42" messages.  I'm hoping that SCO does a
retry on these...  Got any clue as to what I should look for in order
to get rid of these?

The install also seems to be running VERY slow!  It's been running for
almost 5 hours now, and still only at 5% installed (acording to the
progress bar)!  The messages (particularly "copying file" messages) do
seem to update fairly regularly on the Installation Status line, so I
know work is being done.  I imagine that the timeouts ain't helping in
this regard.

Other than that, it is running, with no other issues!!!  (Apparently,
the "lock unit" was already implemented...)  Now, I just need to wait
for it to complete!

I am going to let it run overnight.  I'll post back tomorrow as soon
as it finishes...

Carl
 

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