Here's a quote from the source file
"// this driver is very much incomplete, in fact, I shouldn't have submitted yet, hehe
//
// the main things it needs is emulation of the CTC Z8430A and DART Z8470 chips.
// in case anybody wants to work on this before I get back to it a datasheet that covers
// those two chips can be found at <a href="http://www.zilog.com/docs/z80/um0081.pdf" target="_blank" target="_new">http://www.zilog.com/docs/z80/um0081.pdf</a>"
Currently, I'm busy with other stuff, so if anyone wants to take a crack at laireuro go right ahead.
Something I didn't mention, it also needs a Phillips 22VP932 interpreter, which as far as I know is undocumented.