Op 26-11-2012 20:47, bruce.bowman tds.net schreef: > All the bootable CDs that I've seen have contained a floppy disk image. > This is what actually boots. During the boot process the embedded > AUTOEXEC.BAT and CONFIG.SYS reload the drive and assigns it a DOS drive > letter. Only after that's done does the full content of the CD become > accessible to the OS.
Yes, DOS is only able to boot from FAT filesystem, and thus not natively from CD-ROM as that uses ISO9660 filesystem. In theory it might be possible to build this into the FreeDOS kernel, but then again it's not really DOS anymore in such a case. To work around this, the EL-Torito specification was created, allowing you to specify a bootloader or bootdisk image as startup part on a CD. > MagicISO seems to do well with editing the CD image but not the FD > image. To get this to autorun, I have to be able to edit AUTOEXEC.BAT > and CONFIG.SYS. So MagicISO is not the answer. I've done a full scan and > detected no sign of the trojan that someone warned me about. > Nonetheless, I have removed this software from my computer. I did a full > backup and saved my system state last weekend, so I'm not too worried > about it. I use WinImage to extract files to local disk, then modify these files and finally insert/replace them again in the disk image. Your ISO modification tool (UltraISO, PowerISO etc) might allow to insert the modified bootdisk imagefile again. The other option ofcourse is to recreate the CD-ROM using ImgBurn for example (or arcane options like MKISOFS). Explaining how to use CD mastering programs can be quite difficult. > I'm now starting all over using the instructions found here: > http://www.k1ea.com/hints/Creating_a_Bootable_DOS_CD_V%201.5.pdf At first sight that looks like Georg Potthast's guide for creating a bootcd using a harddisk image. > I would like to do this using FreeDOS instead of DOS 7.1, though. The > more I play with FreeDOS the more I like its features. What actually > happens if I "install" FreeDOS on my Windows computer? I don't want to > do that and end up with a machine that won't boot XP. I'd recommend not to install FreeDOS on the same partition (driveletter) as Windows XP. A separate partition or disk might be safest. On modern systems use a USB Flash Drive and some USB installation tool like RUFUS. Bernd ------------------------------------------------------------------------------ Monitor your physical, virtual and cloud infrastructure from a single web console. Get in-depth insight into apps, servers, databases, vmware, SAP, cloud infrastructure, etc. Download 30-day Free Trial. Pricing starts from $795 for 25 servers or applications! http://p.sf.net/sfu/zoho_dev2dev_nov _______________________________________________ Freedos-user mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/freedos-user
