(WIP) David Haywood's Homepage - 模擬器

2013.11.25

6 in 1的MVS基板模擬。

"Slug Army"

　　 The MVS part of the NeoGeo MVS stands for “Multi Video System”

One of the key features of the hardware was to reduce costs for
operators by allowing multiple games in one cabinet, hance the
‘Multi’ part of the name. The original units shipped with up to
6 slots cartridge slots.

It’s slightly ironic therefore that an emulator names ‘MAME’
where the M standards for a very similar ‘Multiple’ has never
emulated this functionality considering it’s such a key part of
what the hardware was. That is until now.

While in emulation circles this isn’t groundbreaking (most of the
other NeoGeo emulators have been able to do this for a while) it’s
always been slightly out of the reach of MAME. However, times change,
and much like ST-V (and several others) in the past, the driver gained
the ability to use Software Lists as an alternate launching method a
couple a year or two back. So far with NeoGeo that’s been limited to
a single slot AES / MVS unit, but the capability to support multiple
slots does exist and is already used by several drivers so it was only
to be expected that the NeoGeo would take advantage of this.

Unfortunately for now the code is a bit ugly (in part due to having to
maintain the legacy MAME loading system alongside the new one) but for
many combinations of cartridges it works. Some fail, especially the
bootlegs (I have a feeling they probably fail on real hardware too)
but also some originals (less sure) so it definitely needs work, and
some cleanups but it’s a massive step forwards in terms of actual
emulation of the ‘MVS’ as it should be emulated.

The way it works on real hardware (and now in MAME) is that the unit
will cycle through the attract modes of all the games that you have
plugged in. Upon inserting a coin it will jump to the title screen of
the current game and you can use the ‘next’ and ‘previous’ buttons
on the cabinet to cycle through the selection available to you (these
are mapped in MAME as 3 and 4)

Here is a video of an MVS unit loaded with all the Metal Slug games,
it demonstrates running the attract mode, then coining up and flipping
between installed titles The first coin is inserted at 6:45, after
each game has shown an attract demo.

https://www.youtube.com/watch?feature=player_embedded&v=s7sNe6IJywo　　

*edit* this might not make it into 0.152, the code has been reverted
without any consultation and without being given any time to
clean it up. I lost my SVN access in the past for less, but
double standards are what Mamedev is all about these days.
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來源：http://mamedev.emulab.it/haze/2013/11/25/slug-army/

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