Date: Tue, 26 Sep 2000 12:15:11 -0300 From: Gustavo Pamplona <pamplona@uai.com.br> To: freebsd-questions@freebsd.org Subject: Something like booting from disk images (just/only completing) Message-ID: <3.0.6.32.20000926121511.0079b290@uai.com.br>
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Hi. What I want is a program that get a disk image already written in disk, (I dont'know) write it to a ram disk and boot from the ramdisk. Some/Any * kind of DOS based program .? * I don't know if the right form is interrogative or affirmative. Something like "LOADLIN.EXE" for Linux or "FBSDBOOT.EXE" * , but not just for kernel images. * Since the kernel was compiled for a.out format/shape. For example: I get the boot.flp from freebsd floppy disk image, or a DOS boot disk already written, for example, "dosboot.img". The dosboot.img have a total file size of 1474560 bytes, in other words a reliable disk image of the first MS-DOS disk. (Of a three setup disks, MS-DOS 6.22) Again, something like it. # dd if=/dev/fd0c of=/dosboot.img bs=512 count=2880 And, I don't know, the program get the file dosboot.img, write to the RAM, and again, I don't know, handle the INT 19 (DOS based interruption), clean all the MS-DOS registers, and proceed to load the disk as it have been inserted in the floppy drive. in other words, the normal way of booting a MS-DOS Setup Disk. Do you understand me. The program get the disk image, write to RAM, and boot from RAM, something like with calling the first three sectors from a boot disk. The BIOS do this with Diskettes or Hard Drives, Bios try to run/execute * the first three sectors of bother, put them to the BIOS boot code and finally the disk is booted on the RAM. * I don't know the right verb. In other words, for example: One beautiful day I decide to install Minix, so, what I do, I get the disk image already written at disk, and I write this command of a DOS Prompt c:\>rambootd minix.img Loading minix.img .................................. 'rambootd' is the name of the program that would do the boot procedure from ram disk. At this point, the minix.img is written to the RAM, and the program handle the Int 19h, of way that the RAM contents will not be cleaned. And, tchantchantchann. Minix is already loaded and running perfectly well. As I already said in my previous e-mail, I don't have no floppy drives, cause I have a Colorado Jumbo 250 MB Floppy Tape Drive and I usually use CD-ROM to boot my system. I would stay so happy who can answer my question. 8-) and more happy who can write to me my Englsh errors. My english is BAD. It's logic, I need to build the sentence in Portuguese in my mind/brain for after build it again in English. If anybody have interesting? I can give some Portuguese lessons. Meu Inglês é RUIM, É lógico, Eu preciso construir a sentença em Português em meu cérebro para depois construir ela de novo em Inglês Se alguém tiver interesse? Eu posso dar algumas aulas de Português. []'s and Thanx. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the messagehelp
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