Re: Thinkpad won't boot ISO image
On 17-Feb-00 Mike Smith wrote: On 16-Feb-00 Mike Smith wrote: This is a problem with the thinkpad BIOS that I have not had the time to be able to track down. It would *appear* to be that the BIOS does not do int 13 handling on boot cdroms, and the boot/loader makes much use of that for loading the kernel and drivers. The problem with the Thinkpad BIOS is where it puts the emulated floppy image's disk number - it's not in the 'normal' place, and I don't exactly know how to deal with it cleanly. If someone were to lend me a thinkpad or look at this it would be easy to fix. Err, which place? The emulated device is always BIOS drive 0x00, aka the first floppy drive when you are emulating a floppy. It's not, which is the "Thinkpad CDROM boot problem". The one report I recall put it on 0x87, but I don't have any concrete evidence to suggest that it's always there either. Gah. Then they need to learn how to read standards. It is passed in via %dl at least? -- John Baldwin [EMAIL PROTECTED] -- http://www.FreeBSD.org/~jhb/ PGP Key: http://www.cslab.vt.edu/~jobaldwi/pgpkey.asc "Power Users Use the Power to Serve!" - http://www.FreeBSD.org/ To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-current" in the body of the message
Re: Thinkpad won't boot ISO image
On 17-Feb-00 Mike Smith wrote: On 16-Feb-00 Mike Smith wrote: This is a problem with the thinkpad BIOS that I have not had the time to be able to track down. It would *appear* to be that the BIOS does not do int 13 handling on boot cdroms, and the boot/loader makes much use of that for loading the kernel and drivers. The problem with the Thinkpad BIOS is where it puts the emulated floppy image's disk number - it's not in the 'normal' place, and I don't exactly know how to deal with it cleanly. If someone were to lend me a thinkpad or look at this it would be easy to fix. Err, which place? The emulated device is always BIOS drive 0x00, aka the first floppy drive when you are emulating a floppy. It's not, which is the "Thinkpad CDROM boot problem". The one report I recall put it on 0x87, but I don't have any concrete evidence to suggest that it's always there either. Gah. Then they need to learn how to read standards. It is passed in via %dl at least? After David's response, I'm wondering whether the problem isn't that they _arent_ passing the value in via %dl, and we're just getting trash. Not sure how it is that boot1/2 are working though. -- \\ Give a man a fish, and you feed him for a day. \\ Mike Smith \\ Tell him he should learn how to fish himself, \\ [EMAIL PROTECTED] \\ and he'll hate you for a lifetime. \\ [EMAIL PROTECTED] To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-current" in the body of the message
Re: Thinkpad won't boot ISO image
On 17-Feb-00 Mike Smith wrote: On 17-Feb-00 Mike Smith wrote: On 16-Feb-00 Mike Smith wrote: This is a problem with the thinkpad BIOS that I have not had the time to be able to track down. It would *appear* to be that the BIOS does not do int 13 handling on boot cdroms, and the boot/loader makes much use of that for loading the kernel and drivers. The problem with the Thinkpad BIOS is where it puts the emulated floppy image's disk number - it's not in the 'normal' place, and I don't exactly know how to deal with it cleanly. If someone were to lend me a thinkpad or look at this it would be easy to fix. Err, which place? The emulated device is always BIOS drive 0x00, aka the first floppy drive when you are emulating a floppy. It's not, which is the "Thinkpad CDROM boot problem". The one report I recall put it on 0x87, but I don't have any concrete evidence to suggest that it's always there either. Gah. Then they need to learn how to read standards. It is passed in via %dl at least? After David's response, I'm wondering whether the problem isn't that they _arent_ passing the value in via %dl, and we're just getting trash. Not sure how it is that boot1/2 are working though. I don't think boot1/2 would work at all if %dl was wrong. One thing to note, is that when I finally get cdboot working to the point of loading the loader, I am going to have a similar problem since the device number typically used when booting from a CD is 0x9f, which is not contiguous from 0x80. -- John Baldwin [EMAIL PROTECTED] -- http://www.FreeBSD.org/~jhb/ PGP Key: http://www.cslab.vt.edu/~jobaldwi/pgpkey.asc "Power Users Use the Power to Serve!" - http://www.FreeBSD.org/ To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-current" in the body of the message
Re: Thinkpad won't boot ISO image
On Wed, 16 Feb 2000, Mike Smith wrote: The problem with the Thinkpad BIOS is where it puts the emulated floppy image's disk number - it's not in the 'normal' place, and I don't exactly know how to deal with it cleanly. If someone were to lend me a thinkpad or look at this it would be easy to fix. I'd like to help look at this. I have a ThinkPad 770 and it too exhibits this behavior. Unfortunately it's my only laptop so I can't loan it out but I certainly would like to help out if I can. I've got an up-to-date -current running. What code should I look at in sys/boot and how do I figure out where the Thinkpad BIOS puts the emulated floppy image's disk number? You'll need a CD burner and the time patience to produce a small number of coasters for this. O.K. I've got a burner and boat loads of cheap media so no problem there. One question though -- Once I've modified the sources as you've outlined below, how do I make the bootable floppy image that gets written to the CDR? In sys/boot/i386/loader/main.c:main() you will need to print the value of initial_bootdev, sometime after the console is initialised. From what I've seen, I get the impression that it will be something like 0x87. This is the root of the problem; floppy disks are typically numbered 0,1 and hard disks are numbered 0x80,0x81, etc. Normally all the unit numbers are contiguous. Understood (I think) :-) On my Thinkpad I believe I've seen things like 0x8b or some such. This will be the first CD to burn... If this is the case, you will need to modify sys/boot/i386/libi386/biosdisk.c:bd_init() to check whether it's scanned the BIOS unit number from initial_bootdev, and if not (and it's legal) scan it as well. Once we've 'probed' the BIOS unit, everything else should work correctly. O.K. this makes a lot of sense and sounds easy. If you decide to take this on, please let me know how you go. Will do! Thanks! And thank you too!!! Tom To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-current" in the body of the message
Re: Thinkpad won't boot ISO image
On 16-Feb-00 Mike Smith wrote: This is a problem with the thinkpad BIOS that I have not had the time to be able to track down. It would *appear* to be that the BIOS does not do int 13 handling on boot cdroms, and the boot/loader makes much use of that for loading the kernel and drivers. The problem with the Thinkpad BIOS is where it puts the emulated floppy image's disk number - it's not in the 'normal' place, and I don't exactly know how to deal with it cleanly. If someone were to lend me a thinkpad or look at this it would be easy to fix. Err, which place? The emulated device is always BIOS drive 0x00, aka the first floppy drive when you are emulating a floppy. -- John Baldwin [EMAIL PROTECTED] -- http://www.FreeBSD.org/~jhb/ PGP Key: http://www.cslab.vt.edu/~jobaldwi/pgpkey.asc "Power Users Use the Power to Serve!" - http://www.FreeBSD.org/ To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-current" in the body of the message
Re: Thinkpad won't boot ISO image
O.K. I've got a burner and boat loads of cheap media so no problem there. One question though -- Once I've modified the sources as you've outlined below, how do I make the bootable floppy image that gets written to the CDR? Since we only care about getting to the point where the loader can read the disk image, it's actually pretty easy. Take the kern.flp file off the install CD, then say: vnconfig /dev/vn0 kern.flp mount /dev/vn0a /mnt dink with stuff on /mnt umount /mnt vnconfig -u /dev/vn0 After that, you can create an almost empty CD, which should take very little time to burn... -- \\ Give a man a fish, and you feed him for a day. \\ Mike Smith \\ Tell him he should learn how to fish himself, \\ [EMAIL PROTECTED] \\ and he'll hate you for a lifetime. \\ [EMAIL PROTECTED] To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-current" in the body of the message
Re: Thinkpad won't boot ISO image
On Wed, 16 Feb 2000, Mike Smith wrote: This is a problem with the thinkpad BIOS that I have not had the time to be able to track down. It would *appear* to be that the BIOS does not do int 13 handling on boot cdroms, and the boot/loader makes much use of that for loading the kernel and drivers. The problem with the Thinkpad BIOS is where it puts the emulated floppy image's disk number - it's not in the 'normal' place, and I don't exactly know how to deal with it cleanly. If someone were to lend me a thinkpad or look at this it would be easy to fix. I'd like to help look at this. I have a ThinkPad 770 and it too exhibits this behavior. Unfortunately it's my only laptop so I can't loan it out but I certainly would like to help out if I can. I've got an up-to-date -current running. What code should I look at in sys/boot and how do I figure out where the Thinkpad BIOS puts the emulated floppy image's disk number? Tom To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-current" in the body of the message
Re: Thinkpad won't boot ISO image
Mike Smith wrote: The problem with the Thinkpad BIOS is where it puts the emulated floppy image's disk number - it's not in the 'normal' place, and I don't exactly know how to deal with it cleanly. If someone were to lend me a thinkpad or look at this it would be easy to fix. How would I be able to help out with this? I have an older version of -CURRENT on one partition, if you have something that needs to be run under FreeBSD. I also have Win98 available, if that helps. Let me know... Gerald. -- This is your FreeBSD -- Where do YOU want to go tommorow? To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-current" in the body of the message
Re: Thinkpad won't boot ISO image
The problem with the Thinkpad BIOS is where it puts the emulated floppy image's disk number - it's not in the 'normal' place, and I don't exactly know how to deal with it cleanly. If someone were to lend me a thinkpad or look at this it would be easy to fix. I'd like to help look at this. I have a ThinkPad 770 and it too exhibits this behavior. Unfortunately it's my only laptop so I can't loan it out but I certainly would like to help out if I can. I've got an up-to-date -current running. What code should I look at in sys/boot and how do I figure out where the Thinkpad BIOS puts the emulated floppy image's disk number? You'll need a CD burner and the time patience to produce a small number of coasters for this. In sys/boot/i386/loader/main.c:main() you will need to print the value of initial_bootdev, sometime after the console is initialised. From what I've seen, I get the impression that it will be something like 0x87. This is the root of the problem; floppy disks are typically numbered 0,1 and hard disks are numbered 0x80,0x81, etc. Normally all the unit numbers are contiguous. If this is the case, you will need to modify sys/boot/i386/libi386/biosdisk.c:bd_init() to check whether it's scanned the BIOS unit number from initial_bootdev, and if not (and it's legal) scan it as well. Once we've 'probed' the BIOS unit, everything else should work correctly. If you decide to take this on, please let me know how you go. Thanks! -- \\ Give a man a fish, and you feed him for a day. \\ Mike Smith \\ Tell him he should learn how to fish himself, \\ [EMAIL PROTECTED] \\ and he'll hate you for a lifetime. \\ [EMAIL PROTECTED] To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-current" in the body of the message
Re: Thinkpad won't boot ISO image
On 16-Feb-00 Mike Smith wrote: This is a problem with the thinkpad BIOS that I have not had the time to be able to track down. It would *appear* to be that the BIOS does not do int 13 handling on boot cdroms, and the boot/loader makes much use of that for loading the kernel and drivers. The problem with the Thinkpad BIOS is where it puts the emulated floppy image's disk number - it's not in the 'normal' place, and I don't exactly know how to deal with it cleanly. If someone were to lend me a thinkpad or look at this it would be easy to fix. Err, which place? The emulated device is always BIOS drive 0x00, aka the first floppy drive when you are emulating a floppy. It's not, which is the "Thinkpad CDROM boot problem". The one report I recall put it on 0x87, but I don't have any concrete evidence to suggest that it's always there either. -- \\ Give a man a fish, and you feed him for a day. \\ Mike Smith \\ Tell him he should learn how to fish himself, \\ [EMAIL PROTECTED] \\ and he'll hate you for a lifetime. \\ [EMAIL PROTECTED] To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-current" in the body of the message
Re: Thinkpad won't boot ISO image
Mine is on 0x8b. Following some sugestions I hacked my boot/loader to look specifically at 0x8b it didn't work. I even went so far as to force 0x8b even though the autodetect did not work... it still didn't work. I then looked at the 1st stage boot loader as that *was* able to load boot/loader. I noticed a huge difference between the 2, with a comment in the 1st stage boot loader about a workarround for int 13h handling since not all bios's did it correctly. I then looked at boot/loader and noticed it *only* did int 13h handling. -- David Cross | email: [EMAIL PROTECTED] Acting Lab Director | NYSLP: FREEBSD Systems Administrator/Research Programmer | Web: http://www.cs.rpi.edu/~crossd Rensselaer Polytechnic Institute, | Ph: 518.276.2860 Department of Computer Science| Fax: 518.276.4033 I speak only for myself. | WinNT:Linux::Linux:FreeBSD To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-current" in the body of the message
