>The Freedom Fighter proto version runs on modified Star Rider HW, using the Philips 22VP931 >laser disc player instead of the Pioneer PR-8210A. 22VP931 is also used in Firefox which is >already emulated. The non-proto version runs on a dedicated boardset, with the same LDP.
Thanks with the info and also fortunately Matt Ownby's blog is around since that will get another round of future visits later now that Vas's initial work is underway in MAME source code.