Hi! Originally eltorito.sys was only designed to work for a boot sequence like: BIOS -> CD-ROM with no-emulation bootloader (for example syslinux) -> memdisk -> DOS -> eltorito.sys eltorito.sys continues to use the BIOS to access the device.
I discovered that eltorito.sys can be also used for CD-ROM devices which haven't booted by BIOS or BIOS extender (for example bootable cd loader is a BIOS extender). One example is at http://grub4dos.sourceforge.net/wiki/index.php/DOS You can also make the boot sequence like: BIOS -> bootable harddisk (no matter if IDE, SATA or USB as long as supported by BIOS or by BIOS extender) -> grub4dos -> DOS even in this case eltorito.sys can access a CD-ROM. The relevant example (tested and working) demonstrates this: title booting FreeDOS from raw image (as harddisk) + FreeDOS installer CD\nit's up to the operating system to load a device driver for the virtual CD-ROM, for example:\ndevload eltorito.sys /D:eltorito\nshsucdx.com /D:eltorito map --unsafe-boot /FreeDOS.img (hd0) map /fdfullcd.iso (hd32) map --hook chainloader --force (hd0)+1 Another example (not well tested) for a real CD-ROM, you use grub4dos as a BIOS extender (works also if BIOS can not even boot from CD-ROM, doesn't always work). title boot hdd and initalize cd-rom chainloader /kernel.sys cd-rom --init map --hook # here also devload eltorito.sys /D:eltorito ; shsucdx.com /D:eltorito should make the real CD-ROM available to DOS using eltorito.sys. -mr ------------------------------------------------------------------------------ Apps built with the Adobe(R) Flex(R) framework and Flex Builder(TM) are powering Web 2.0 with engaging, cross-platform capabilities. Quickly and easily build your RIAs with Flex Builder, the Eclipse(TM)based development software that enables intelligent coding and step-through debugging. Download the free 60 day trial. http://p.sf.net/sfu/www-adobe-com _______________________________________________ Freedos-user mailing list Freedos-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/freedos-user
