Log Message:
mame: update to 0.256.

Yes, it’s already time for MAME 0.256, our midyear release! Several
very rare and exciting things have turned up this month. Remember
that rally racing game Top Driving that was added last month? This
month, Mortal Race, an earlier, rarer game based on the same codebase
has been found and dumped. The rare Gamate cartridge Mighty Boxer
has finally been tracked down and dumped, which means all Gamate
games known to have been released are accounted for. Taiko no
Tatsujin RT: Nippon no Kokoro has been dumped, bringing us closer
to completing the Namco System 10 collection. This offshoot of the
popular series was designed for venues like hospitals and aged care
facilities. It doesn’t accept coins, and it features easier songs.
Four more versions of the prototype arcade game Turbo Sub have also
been dumped and added.

For computers, there are lots of software list additions, particularly
for MSX and ZX Spectrum. The Heathkit H89 now has enough functionality
emulated to be marked working. You can now add ROM cards to your
emulated Apple II computers, and FLEX now works on the TRS Color
Computer family.

There are also lots of emulation improvements, including fixes for
a few more Taito F3 graphical glitches, and better graphics layer
mixing on Sharp X68000. Behind the scenes, we’ve been working on
support for wait states in the MOS 6502 and Hitachi H8 CPU families
and there have been some changes to streamline the code.