reactos-kernel

[ros-kernel]CDROM bootsector

[Eric K. <ek...@rz...>]

Hi!

Last weekend I played a little with 'Isolinux' (ISO9660 boot code for linux)
from the 'Syslinux' package. I thought about removing the parts that are not
needed to load and run FreeLdr.sys. Today I found the announcement of 'Boot
Scriptor' (proprietary license) on Freshmeat (www.freshmeat.net) which uses
a stripped Isolinux (GPL'd). I guess this is exactly what we need to boot
FreeLoader from cdrom.


Eric

RE: [ros-kernel]CDROM bootsector

[Brian P. <br...@sg...>]

I was under the impression that bootable cdrom's used some kind of
emulation mode to emulate a floppy drive. In that case the regular FAT12
boot sector should work because you supply a floppy disk image on the
bootable cdrom. Is there someplace where I can get more information
about this?

Brian

-----Original Message-----
From: rea...@li...
[mailto:rea...@li...] On Behalf Of Eric
Kohl
Sent: Tuesday, April 16, 2002 8:24 AM
To: ReactOS-Kernel
Subject: [ros-kernel]CDROM bootsector

Hi!

Last weekend I played a little with 'Isolinux' (ISO9660 boot code for
linux)
from the 'Syslinux' package. I thought about removing the parts that are
not
needed to load and run FreeLdr.sys. Today I found the announcement of
'Boot
Scriptor' (proprietary license) on Freshmeat (www.freshmeat.net) which
uses
a stripped Isolinux (GPL'd). I guess this is exactly what we need to
boot
FreeLoader from cdrom.


Eric




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reactos-kernel mailing list
rea...@li...
https://lists.sourceforge.net/lists/listinfo/reactos-kernel

RE: [ros-kernel]CDROM bootsector

[Kohn E. D. <em...@cs...>]

Searching with Google for:

bootable CD-ROM specification

revealed this:

"El Torito" Bootable CD-ROM Format Specification"

http://www.phoenix.com/PlatSS/PDFs/specs-cdrom.pdf



On Tue, 16 Apr 2002, Brian Palmer wrote:

> I was under the impression that bootable cdrom's used some kind of
> emulation mode to emulate a floppy drive. In that case the regular FAT12
> boot sector should work because you supply a floppy disk image on the
> bootable cdrom. Is there someplace where I can get more information
> about this?
>
> Brian
>
> -----Original Message-----
> From: rea...@li...
> [mailto:rea...@li...] On Behalf Of Eric
> Kohl
> Sent: Tuesday, April 16, 2002 8:24 AM
> To: ReactOS-Kernel
> Subject: [ros-kernel]CDROM bootsector
>
> Hi!
>
> Last weekend I played a little with 'Isolinux' (ISO9660 boot code for
> linux)
> from the 'Syslinux' package. I thought about removing the parts that are
> not
> needed to load and run FreeLdr.sys. Today I found the announcement of
> 'Boot
> Scriptor' (proprietary license) on Freshmeat (www.freshmeat.net) which
> uses
> a stripped Isolinux (GPL'd). I guess this is exactly what we need to
> boot
> FreeLoader from cdrom.
>
>
> Eric
>
>
>
>
> _______________________________________________
> reactos-kernel mailing list
> rea...@li...
> https://lists.sourceforge.net/lists/listinfo/reactos-kernel
>
>
> _______________________________________________
> reactos-kernel mailing list
> rea...@li...
> https://lists.sourceforge.net/lists/listinfo/reactos-kernel
>

RE: [ros-kernel]CDROM bootsector

[Michael R. <alp...@al...>]

> I was under the impression that bootable cdrom's used some 
> kind of emulation mode to emulate a floppy drive. In that 
> case the regular FAT12 boot sector should work because you 
> supply a floppy disk image on the bootable cdrom. Is there 
> someplace where I can get more information about this?

Here's an MS KB article on the subject.


http://support.microsoft.com/default.aspx?scid=kb;EN-US;q167685

Re: [ros-kernel]CDROM bootsector

[Eric K. <ek...@rz...>]

"Michael Rich" <alp...@al...> wrote:


> Here's an MS KB article on the subject.
>
>
> http://support.microsoft.com/default.aspx?scid=kb;EN-US;q167685
>

Modern cd-writer software does that for you. If your software supports the
creation of bootable cds (El Torito format) you don't need to deal with
this. IMO it seems to be a workaround for cd-writer software that doesn't
support bootable cds.

Eric

Re: [ros-kernel]CDROM bootsector

[Daniel G. <da...@fp...>]

On Wed, 17 Apr 2002 13:51:47 +0200
"Eric Kohl" <ek...@rz...> wrote:

> 
> "Michael Rich" <alp...@al...> wrote:
> 
> 
> > Here's an MS KB article on the subject.
> >
> >
> > http://support.microsoft.com/default.aspx?scid=kb;EN-US;q167685
> >
> 
> Modern cd-writer software does that for you. If your software supports the
> creation of bootable cds (El Torito format) you don't need to deal with
> this. IMO it seems to be a workaround for cd-writer software that doesn't
> support bootable cds.
> 
> Eric

Well, there's always the fact that, once you've booted the CD, you generally
need to be able to access it to install or whatever.  For that, you need an
ISO driver.  Many up and coming OSs don't have ISO drivers (reactos among them
for now) so they, in the early stages, use Linux on their bootable CDs to
install.  All that takes is writing a driver for their prefered FS if Linux
does not already have one.

Daniel

Re: [ros-kernel]CDROM bootsector

[Eric K. <ek...@rz...>]

"Daniel Gryniewicz" <da...@fp...> wrote:

> Well, there's always the fact that, once you've booted the CD, you
generally
> need to be able to access it to install or whatever.  For that, you need
an
> ISO driver.  Many up and coming OSs don't have ISO drivers (reactos among
them
> for now) so they, in the early stages, use Linux on their bootable CDs to
> install.  All that takes is writing a driver for their prefered FS if
Linux
> does not already have one.

IMO there is no reason to use Linux to install ReactOS because a ISO-9660
file system driver (cdfs.sys) is currently under construction.


Eric Kohl

Re: [ros-kernel]CDROM bootsector

[Daniel G. <da...@fp...>]

On Fri, 19 Apr 2002 12:33:26 +0200
"Eric Kohl" <ek...@rz...> wrote:

> 
> "Daniel Gryniewicz" <da...@fp...> wrote:
> 
> > Well, there's always the fact that, once you've booted the CD, you
> generally
> > need to be able to access it to install or whatever.  For that, you need
> an
> > ISO driver.  Many up and coming OSs don't have ISO drivers (reactos among
> them
> > for now) so they, in the early stages, use Linux on their bootable CDs to
> > install.  All that takes is writing a driver for their prefered FS if
> Linux
> > does not already have one.
> 
> IMO there is no reason to use Linux to install ReactOS because a ISO-9660
> file system driver (cdfs.sys) is currently under construction.
> 
> 
> Eric Kohl
> 

Oh, I definitely agree.  I was merely mentioning why some OS projects use
Linux on bootable CD-ROMs.  If you have a ISO-9660 driver and an ATAPI driver,
you should definitely use your own and not someone elses. :)  (You here being
whoever is writing an OS)

Daniel
--- 
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        See Recursion.
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