too big rom file for 64k NIC ROM chip

[NiKiZe]

Hi, Welcome to the forum!

The size of iPXE depends on which features are enabled at compile time, you can see https://git.ipxe.org/ipxe.git/blob/HEAD:...box/README which describes how to use the vbox named config which has some features disabled to fit in the limited 56K that is its max size. However iPXE grows over time, so latest build might actually not fit :/

You can then modify your own config to disable features in your bootstrapping iPXE ROM with the vbox one as a base.
It is likely that you still will want to chain into a more fully featured version of iPXE from the ROM.