[syslinux] How to recognize an MBR suitable for isohybrid --mac ?

[Bernd Blaauw]

Op 22-6-2012 15:02, Thomas Schmitt schreef:

> So just in case somebody is curious, here is a description how to prepare
> test media on Linux. It will need about 1.4 GB of disk space.

Would it be possible to create such a concept isohybrid ISO that's 
slightly smaller, like http://boot.ipxe.org/ipxe.iso ? That's currently 
1 MB (500KB base + filler).

My apologies for not being any help on your original question, maybe 
Matthew Garrett has some additional advice.