search for: mbr_select

...tion using any of the > standard MBRs (not necessarily altmbr), But the --partok MBRs (isohdpp*) stem from altmbr ? If so: don't they need the partition number patched in ? (If not: i have to rethink the link to article "Mbr" at http://www.syslinux.org/wiki/index.php/Isohybrid#MBR_selection ) > One of the main uses is for backup partitions -- often distros want a > filesystem that cannot be written for that, and iso9660 fits the bill. Are examples known ? Up to now i have to stay quite vague in http://www.syslinux.org/wiki/index.php/Isohybrid#Images_prepared_with_--part...

...ohdpfx[hd0 + 3 * partok], MBRSIZE); The indize do not apply to bytes but to byte arrays of size MBRSIZE. extern unsigned char isohdpfx[][MBRSIZE]; (hd0 + 3 * partok) selects a particular MBR template from an array of six MBRs. See also http://www.syslinux.org/wiki/index.php?title=Isohybrid#MBR_selection It tells which isohd*.bin file is selected by which combination of options. > does anyone have suggestions for what modification I'd need to look at > to support this on a logical parttion? Sorry, not me. One will probably have to analyze the code of MBR and/or isolinux.bin to find...

...gt; > The indize do not apply to bytes but to byte arrays of size MBRSIZE. > > extern unsigned char isohdpfx[][MBRSIZE]; > > (hd0 + 3 * partok) selects a particular MBR template from an array of > six MBRs. See also > http://www.syslinux.org/wiki/index.php?title=Isohybrid#MBR_selection > > It tells which isohd*.bin file is selected by which combination of options. > > >> does anyone have suggestions for what modification I'd need to look at >> to support this on a logical parttion? > > Sorry, not me. One will probably have to analyze the code...

Hi, In the Bios folder inside mbr, there are different types of mbr_c.bin mbr_f.bin as well as mbr.bin, is there a description available which tells which mbr is to be used in which case? please point me to the description or kindly explain. while installing syslinux on my device (usb, sd-card) i can use the arguments '-H' and '-S' to specify heads and sectors, these should be the

...: Do all six fixed isohdp*.bin variations still fit into 432 bytes ? mbr/Makefile builds among other MBRs: isohdpfx.bin isohdppx.bin isohdpfx_c.bin isohdppx_c.bin isohdpfx_f.bin isohdppx_f.bin Their purpose is explained in the table at http://www.syslinux.org/wiki/index.php?title=Isohybrid#MBR_selection Have a nice day :) Thomas

Hi, I have been attempting to set up a multi-boot USB stick (i.e. multiple bootable ISO images on the one stick) I have had good success by: - processing ISO with isohybrid (with "partok" flag) - dd'ing ISO to primary partitions on the USB stick (e.g /dev/sdc2, /dev/sdc3, /dev/sdc4) - installing grub to USB stick and configuring to chainload to these partitions To remove the limit

Hi, i am trying to document the MBR selection by isohybrid option --partok. I assume it is related to "altmbr.bin" as described in http://www.syslinux.org/wiki/index.php/Mbr But there i read "altmbr.bin [...] boots from a partition with fixed number, see below." The "see below" probably refers to "The altmbr.bin (all 3 variants) is only 439 bytes long, -- one

> Hi, > > i wrote: > > > I think it still has good reason to exist. > > Ady wrote: > > Would you please clarify what do you mean with "it"? > > "It" was the code part about > > xor %cx, %cx /* Clear EBIOS flag. */ > > which Martin mentioned as "can be ignored" in the the text which i > quoted

...iso=image.iso dd conv=notrunc if=isohdpfx.bin.170324 bs=1 count=432 of="$iso" > Would they differ according to some/any parameter? We do not yet have downloadable binaries of the other five isohdp* variants as listed in http://www.syslinux.org/wiki/index.php?title=Isohybrid#MBR_selection with --partok -ctrlhd0 --forcehd0. I doubt that any distro uses them. If one cares for Macs which were old in 2010, then one can keep the first 32 bytes of the ISO: dd conv=notrunc if=isohdpfx.bin.170324 bs=1 skip=32 seek=32 count=400 of="$iso" but only after having verified that...

Hi, Ady wrote: > so, why the original isohybrid image from Debian and many other > isohybrid images have mostly (but not all) "00s" in place of the "90s"? That's a fake Block0 of an Apple Partition Map. Part of mjg's layout. Caused by isohybrid option --mac or xorrisofs option -isohybrid-apm-hfsplus. * Fedora has it with EFI FAT filesystem in one partition