Hello! Is it possible to load a virtual DOS Floppy with memdisk to do a few things (e.g. scan for viruses, copy a hard disk image from the network to the local disk) and continue booting from the local hard disk without a reboot? Cheers Alex
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Alexander Heinz wrote: | Is it possible to load a virtual DOS Floppy with memdisk to do a few | things (e.g. scan for viruses, copy a hard disk image from the | network to the local disk) and continue booting from the local hard | disk without a reboot? Depends. You can load DOS and boot any other OS after that _if_ you don't use some special Memory tricks like EMM386 or perhaps HIMEM.sys. DOS was used in conjunction with Loadlin in one workaround for the Rocklinux project http://www.zytor.com/pipermail/syslinux/2003-March/001698.html Anyway: you surely can use the syslinux "Bootlocal"-code in a little Dos .com-file to load the Master boot record to the special memory segment (7c00?) and jumping to it... You'll see if your OS still wants to boot after whatever you did in you DOS session... bye Christian -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.4 (MingW32) Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org iD8DBQFA3tqY2gF1h3CVOsMRAqBGAKC9SLT9SpJPfGYCqZgxLcpqwf21QACg4V9/ 44YcAV80gZqesMkEFnQOT+A=dSQF -----END PGP SIGNATURE-----
On June 27, 2004 06:15 am, Alexander Heinz wrote:> Is it possible to load a virtual DOS Floppy with memdisk to do a fewThis I can do albeit in a limited fashion.> to the local disk) and continue booting from the local hard disk without > a reboot?The "without a reboot" is an interesting challenge. For one, you have to deal with cleaning up the virtual floppy space while executing out of it. Like closing the hatch door on the way out; reboot punts this problem. Another is the cmos and hook tweaks needed to redirect the original DOS to the virtual disk need to be gone so the hd os loader doesn't trip on them. 73, Gord.
Do you *really need* a PreOS-memdisk, or would a memdisk image which by default boots to harddisk also be OK? PXELINUX -> MEMDISK -> DOSIMAGE.IMG -> 1) boot local drive (default, after 10 seconds automatically selected) 2) boot DOS for pre-OS options. then 2 would give access to a DOS on the memdisk. too bad that even the Knoppix people don't understand the "localboot 0x80" command. "If you don't want to boot Knoppix, remove the cd and restart" :( if you prefer a free OS for your memdisk, you might want to try FreeDOS instead of MS DOS or DR-DOS 8.00. Bernd then DOS would do something like this: @echo off task1.exe task2.exe rem following line causes reboot, which causes pxelinux/memdisk to load, rem and then after timeout boots into local harddisk. echo Done doing our job..rebooting now. echo Bye Bye, have fun! reboot.com ---------------------------------------------------------------- Op deze e-mail zijn de volgende voorwaarden van toepassing: http://www.fontys.nl/disclaimer The above disclaimer applies to this e-mail message. ----------------------------------------------------------------