It's with a view to messing about with emulation, ultimately possibly making my own emulator
I'm afraid such emulation is far too complex for a hobby project, at least for one person. UAE has taken dozens of highly skilled developers years to develop.
I'd suggest you at least familiarize yourself with the UAE project before starting. Custom chipset emulation is deep magic, m68k emu is childs play in comparision.
I hope I didn't kill the spririt. :-)