From: Jonathan Larmour <jlarmour@redhat.com>
To: Adam Agnew <agnew@missl.cs.umd.edu>
Cc: "Trenton D. Adams" <tadams@extremeeng.com>,
"'Matthew M. DeLoera'" <code.bear@gte.net>,
ecos-discuss@sources.redhat.com, waa@cs.umd.edu,
bdpayne@cs.umd.edu, usn01a@wam.umd.edu
Subject: Re: [ECOS] Problems with RedBoot on x86 generic pc...
Date: Thu, 13 Sep 2001 09:36:00 -0000 [thread overview]
Message-ID: <3BA0E06D.F904DF1A@redhat.com> (raw)
In-Reply-To: <Pine.BSF.4.33.0109130507070.59934-100000@www.missl.cs.umd.edu>
Adam Agnew wrote:
>
> I've tried the provided image for a floppy on several x86 boxen, and it
> works on some, doesn't on others. As a test, i tried setting
>
> cdl_option CYGNUM_HAL_VIRTUAL_VECTOR_COMM_CHANNELS { user_value 1 };
> and
> cdl_option CYGSEM_HAL_I386_PC_DIAG_SCREEN { user_value 0 };
>
> That certainly cleared up the problem, but of course gets rid of the PC's
> screen, which was nice. Maybe someone can use this info to track down the
> bug, I'm not that familiar with the code base yet. But that's a temporary
> fix for poor folks like me who it wasn't working for. Perhaps this is
> just a problem with motherboards with only one serial port. Perhaps its
> deeper, *shrug*.
One way to find out if there's a problem with boards with one serial
port.... go to hal/i386/pcmb/current/src/pcmb_serial.c and comment out the
stuff for channel 1 in cyg_hal_plf_serial_init.
Then go to pcmb_screen.c and in cyg_hal_plf_screen_init change all the "2"s
to "1"s.
Go to /hal_diag.c and remove the middle entry of pc_ser_channels and change
the 3 to a 2.
Finally go to hal/i386/pc/current/cdl_hal_i386_pc.cdl and change
CYGNUM_HAL_VIRTUAL_VECTOR_COMM_CHANNELS to have:
default_value { CYGSEM_HAL_I386_PC_DIAG_SCREEN ? 2 : 1 }
Then build and try a redboot on a PC with one serial port. If it works
where the old image didn't, let us know.
Jifl
--
Red Hat, Rustat House, Clifton Road, Cambridge, UK. Tel: +44 (1223) 271062
Maybe this world is another planet's Hell -Aldous Huxley || Opinions==mine
next prev parent reply other threads:[~2001-09-13 9:36 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-07-11 12:07 Matthew M. DeLoera
2001-07-11 14:25 ` Jonathan Larmour
2001-07-31 7:59 ` Trenton D. Adams
2001-07-31 10:56 ` Jonathan Larmour
2001-07-31 12:01 ` Trenton D. Adams
2001-07-31 13:43 ` Jonathan Larmour
2001-07-31 14:20 ` Trenton D. Adams
2001-07-31 14:23 ` Jonathan Larmour
2001-09-07 11:25 ` Adam Agnew
2001-09-13 2:02 ` Adam Agnew
2001-09-13 3:56 ` [ECOS] RedBoot IDE access on x86 without BIOS Adam Agnew
2001-09-13 4:51 ` Mark Salter
2001-09-13 6:18 ` Adam Agnew
2001-09-13 6:24 ` Mark Salter
2001-09-13 6:53 ` Adam Agnew
2001-09-13 9:36 ` Jonathan Larmour [this message]
2001-09-14 9:14 ` [ECOS] Problems with RedBoot on x86 generic pc Adam Agnew
2001-09-14 12:43 ` Matthew DeLoera
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