This emulator was written a long time a go and my bios is missing but at one time it would boot to an :
thought not bug free or perfect it is different to most Z80 emulators in that it looks at the bit of the opcode rather then just a simple lookup table

Mark Garrett now 2014 this code written in 1989 ;)

I should add that I almost lost this to history and only found a listing in 2013 which I retyped at that time, it looks like there a few typo's needing a fix ;(