in order to make PXE possible with older notebooks, I've compiled for myself Netboot. This is a piece of software, which starts from floppy, where you can load your dos paket driver and start PXE. Basically, it makes possible to boot with PXE by using PCMCIA networks cards from floppy, when nothing else is possible to boot from.

Netboot itself is working so far fine, it initializes itself fine, loads my dos packet driver and starts DHCP. I can clearly see, that a DHCP broadcast comes into my DNSMasq, which replies with a DHCP offer. And here it stops. It seems, Netboot can't correctly handle that offer by DNSMasq, as it silently drops it and tries again.
So I see multiple broadcast searches and DHCP offers.

BUT: If I use DHCP from an ordinary AVM Fritz!Box 7490 (Router), Netboot succeeds and can handle the reply from it. So the question is, what could go wrong? Can I debug this somehow? Any solutions to make this possible work with Netboot?

Note: Netboot is pretty old, latest release is from 2007. I suspect, that maybe DNSMasq does some RFC correct, which is "too new" for those old clients.
Any help would be appreciated.

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