[Fwd: Re: Bochs simulator and pc386 BSP]

Fri May 19 19:57:07 UTC 2000

Erwin Rol wrote:
> 
> here a convo i had with someone about using BOCHs with GDB.

I finally have broken down and am tried BOCHs locally.  It 
built quickly and ran the grub image on the OAR ftp site
the first time.  My .bochsrc is very close to Erwin's 
in the README on the ftp site:

megs: 8
boot: a
vgaromimage: bios/VGABIOS-elpin-2.20
floppya: 1_44=grub_image, status=inserted
romimage: file=bios/BIOS-bochs-990925a, address=0xf0000
log: ./bochs.out
keyboard_serial_delay: 200
floppy_command_delay: 500
vga_update_interval: 300000
ips:  1000000
mouse: enabled=0
private_colormap: enabled=0
i440fxsupport: enabled=0
newharddrivesupport: enabled=1

So now I have a couple of questions:

+ Has anyone used the NE2000 network driver in BOCHs
  with RTEMS?

+ Has anyone configured the mouse so we can run the
  Microwindows demos?

+ What is the BOCHS_GDB_PORT?

+ Can you install it?

--joel

> - Erwin
> 
> -------- Original Message --------
> Subject: Re: Bochs simulator and pc386 BSP
> Date: Wed, 19 Apr 2000 23:34:47 +0200
> From: Erwin Rol <erwin at muffin.org>
> To: Serrae at tsainc.com
> References: <OF430D8160.DB313EF1-ON862568C6.0072EB3B at tsainc.com>
> 
> Serrae at tsainc.com wrote:
> >
> > Erwin,
> >
> > I am a wee bit lost.  I am working on sparc-sun-solaris2.6 not Linux; can I
> > still use bochs?  Also,
> 
> Hmmm i am not a bochs expert but i think it works on any unix.
> 
> >
> > 1) set BOCHS_GDB_PORT - Know how to do it
> > 2) build yer target - Do you mean the application to test like hello.exe?
> yes.
> 
> > 3) build a LILO image from yer binary - How do I do this?
> 
> I ported (ripped) the linux kernel bootcode to make a lilo image from
> a RTEMS executable. should also be on the RTEMS ftp site, under
> LILO floppy i think or something simulair. I believe i actual
> wrote a README for that :-)
> 
> It will probably work with thr GRUB floppies too, but i found them a
> pain
> to build.
> 
> > 4) start bochs (with a correct config file) - Know how to do it
> > 5) start GDB and connect to the TCP port BOCHS_GDB_PORT - Can find out how
> > to do it
> 
> target remote 127.0.0.1:<BOCHS_GDB_PORT>
> 
> >
> > Thanks.
> >
> > Sincerely,
> > Efren
> 
> Let me know if you get it working, if you do and you have some minutes
> to
> spare you might even write down what to do to get it working and mail it
> to the RTEMS list , or directly to Joel and ask if he
> could put it on the FTP site.
> 
> > ~~~~~~~~~~~~~~~~~~~~~~~~~
> > Efren Serra
> > Software Engineer
> > Systems Solutions Group
> > Transaction Systems Architects, Inc.
> > 218 South 108th Avenue
> > Omaha, NE 68154
> > Phone: 402-697-2267
> > FAX: 402-333-9725
> > ~~~~~~~~~~~~~~~~~~~~~~~~~
> >
> >
> >                     Erwin Rol
> >                     <erwin at muffin.or        To:     Serrae at tsainc.com
> >                     g>                      cc:
> >                     Sent by:                Subject:     Re: Bochs simulator and pc386 BSP
> >                     erwin at rawpower.t
> >                     -online.de
> >
> >
> >                     04/18/00 01:44
> >                     PM
> >
> >
> >
> > Serrae at tsainc.com wrote:
> > >
> > > Erwin,
> > >
> > > I built bochs-2000_0104c.tar.gz with your bochs-iodev.tgz additions.  Now
> > > what?
> > > I am using a solaris2.6 + SPARC, and built the rtems target i386-elf.  I
> > > tried ./bochs
> > > from my shell but it failed.  Thanks.
> >
> > That happend to me a lot too :-) check the bochs.out (depends on yer
> > config file)
> > to see why it is bailing out. lots of times it is just because
> > it can't find a drive that is in the config file.
> >
> > The idea is and it worked (with in the stability limits from BOCHS :-)
> > that you create one of the bootable LILO images, and tell BOCHS that
> > image
> > is a floppydrive and than boot from it.
> >
> > Than it will hang until GDB connected to it, with its TCP connection
> > if that happens BOCHS continues normal operation with GDB connected.
> >
> > the environment variable BOCHS_GDB_PORT should be set to the port number
> > that bochs
> > should listen (and wait) on for a GDB connection.
> >
> > for RTEMS it looks like it is talking to a normal serial port GDB and so
> > the GDB
> > stub must be compiled in and initialized.
> >
> > So if bochs exits without doing a thing some bochs config is wrong
> > or the BOCHS_GDB_PORT isn't set, both should be logged in the bohcs log
> > file.
> >
> > if Bochs hangs in the startup screen it is waiting for GDB to connect.
> > check "target remote" on how to connect to a TCP stub or proxy server if
> > you aren't familure with gdb.
> >
> > so in short:
> > 1) set BOCHS_GDB_PORT
> > 2) build yer target
> > 3) build a LILO image from yer binary
> > 4) start bochs (with a correct config file)
> > 5) start GDB and connect to the TCP port BOCHS_GDB_PORT
> > 6) things should work :-)
> > 7) blame me if it doesn't work
> > 8) i will not care anyway :-)
> >
> > BTW. i made that hack because i didn't have a maching to reboot
> > everytime, and
> > didn't had my real target yet from our hardware developers. After i got
> > the real target i never used it anymore. but it helped me quiete a bit
> > to get started.
> >
> > Hope this helps,
> >
> > Erwin
> >
> > >
> > > Sincerely,
> > > Efren
> > > ~~~~~~~~~~~~~~~~~~~~~~~~~
> > > Efren Serra
> > > Software Engineer
> > > Systems Solutions Group
> > > Transaction Systems Architects, Inc.
> > > 218 South 108th Avenue
> > > Omaha, NE 68154
> > > Phone: 402-697-2267
> > > FAX: 402-333-9725
> > > ~~~~~~~~~~~~~~~~~~~~~~~~~

-- 
Joel Sherrill, Ph.D.             Director of Research & Development
joel at OARcorp.com                 On-Line Applications Research
Ask me about RTEMS: a free RTOS  Huntsville AL 35805
   Support Available             (256) 722-9985