Getting ROM file under 64K

[wootty2000]

Im testing in VirtualBox. If i use the inbuilt iPXE, I can chainload a full version from TFTP, but then the network card disappears in the chainloaded version. Is this a know issue?

On real hardware, iPXE locks up the machine randomly with in CLI, sometime skewing the display. Is this a know issue? I have tried looking on the forum, but can not see any one else complaining about it

Not having any luck either with a file larger than 64K.
If I use a mrom file, iPXE starts to load and then crashes out, filling the screen with coloured squares.
If I use a rom file, iPXE starts but locks up as soon as I press CTRL+B

As for pading, I've found it is very easy in python (2 lines).


Thanks