Saturday 13 October 2018

E2B v1.A5b/c/d Beta with support for BSD ISOs

BSD-based ISOs are hard to boot using E2B because BSD does not like the overlapping partitions caused by mapping the ISO file 'inside' the E2B partition.

Most BSD ISO files however can be booted to E2B by using two partitions:

ptn1: FAT32 .imgPTN file containing grub4dos (made using an empty folder)
ptn3: the untouched original BSD ISO file

More details of this method are at the bottom of the page at

Instead of having to make the .imgPTN file for each BSD ISO, I added extra code to QRUN.g4b so that it recognises the new file extension of .isoBSD. This means that you can boot to most BSD ISO files now just by changing the file extension of the ISO to .isoBSD and it will automatically use a small FAT bsd.imgptn file for the ptn1 partition.

The new .isoBSD file extension is recognised by E2B v1.A4c Beta and later versions.

1. Update your E2B drive to  E2B v1.A4d.

2 Change the file extension of your BSD-based ISO file to end in .isoBSD and copy it to your \_ISO\LINUX folder (or any standard menu folder).

3. Run \MAKE_THIS_DRIVE_CONTIGUOUS (run as admin).cmd.

To add another BSD-based ISO, simply add it to the E2B drive and change the file extension to .isoBSD.

Note that the default CSM menu entry will be to boot BSD, but as soon as the BSD menu entry is chosen, the default menu entry is set to #0 Restore E2B partition, so that when you next MBR-boot after running BSD, it will switch partitions back to E2B and load the E2B menu system again automatically.

Only MBR-booting is supported and it does not work with all types of BSD ISOs - see more for details.

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