Log Message:
mame: update to 0.274.

Today’s the day you get to experience MAME 0.274 for the first
time! As previously mentioned, our Windows binary releases now
require a CPU with x86-64-v2 functionality. The most anticipated
feature completed this month is almost certainly the 64-bit ARMv8
recompiler back-end. It’s been tested on macOS, conventional Linux
and Android, and provides some very welcome performance improvements
when emulating systems with RISC CPUs, including MIPS III, PowerPC
and SuperH. In addition to the new back-end, we’ve fixed some bugs
in the existing back-ends and made some performance improvements
for x86-64. Keep in mind that the actual performance benefits you
experience will vary substantially depending on your CPU and the
emulated system and software.

While that was happening, emulation work continued to progress.
This release adds support for numerous digital pets, a couple more
Tronica LCD games, and several synthesisers. Several CD-i graphics
formats have been fixed, and speaking of Philips, video emulation
for their Minitel 2 terminal has been improved as well. Our NEC
µPD17771C emulation has been completely overhauled, which is
particularly noticeable in Star Speeder on the Epoch Super Cassette
Vision.

Lots has been going on in computer emulation this month. We’ve
taken a few steps along the road to emulating the first-generation
Power Macintosh systems; the Heath/Zenith computers now have
hard-sectored floppy formats and working joystick support; the JUKU
E5104 now has mouse support; the Silicon Graphics Professional IRIS
4D workstations are now considered working. There’s also been some
work on Amiga graphics emulation, although some of the improvements
missed this release.