Wikipedia has this to say about it. The full quotes can be found in
this article.
Freely licensed ROMs
The vast majority of computer and video games from the history of such
games are no longer manufactured. As such, the copyright holders of
some games have offered free licenses to those games, often on the condition
that they be used for non-commercial purposes only.
Unlicensed ROMs
While some games which no longer make any profit fit into the category above,
the vast majority are no longer available in any form. The legality
of obtaining such games varies from country to country. Some countries
have special exceptions in copyright laws or case law which permit (or
discourage less) copying when an item is not available for legal purchase
or when the copying is for non-commercial or research purposes, while
other countries may make such practises firmly illegal. There is often
a distinction drawn between distribution and downloading, with distribution
being seen as the greater offence.
Abandonware
It is often the case that games which are still in copyright are no longer
sold or marketed by their copyright holders. This may be due to the
perceived lack of demand for the game or for other reasons. Some of
those engaged in ROM trading claim that such games should be deemed
abandoned by their copyright holders and that the game, termed Abandonware,
can be freely traded by users.
Commercial Distribution
Commercial distribution of copyrighted games without the consent of the copyright
holder is generally illegal in almost all countries, with those who
take part in such activities being liable for both criminal and civil
penalties.
24 Hours Claim
Some ROM websites claim it is legal to download and keep a ROM of a game
one doesn?t own for as long as 24 hours, after which it is ones responsibility
to delete it. Although this claim is widespread, it has no basis in the law.
Enforcement
Many have argued that it would be irrational for a company to spend money
prosecuting for games that they are no longer making profit from, as
there would be no damages to speak of. Even so, this has not deterred
Nintendo from pursuing a number of lawsuits against ROM distribution
websites via non-profit subsidiaries.
All clear on ROM usage then? Let's get on with the cab.
So here it is in all its glory. Well, excuse the condition but it
had been
living in a stable in North Yorkshire, and that would test the mettle
of any man, and indeed the metal too. Do you know any metal men?
Earlier I mentioned that the ideal scenario would be to get a
cab that was no longer functional then I wouldn?t have
the guilt trip of sacrificing a piece of history. Now
this is hardly The Antiques Roadshow I know but it is
still a piece of history none the less and as it was
indeed
no
longer working it fitted the bill perfectly.
Originally the cab had been the eighth Solitaire Challenge
cab sold by US Company Valley Dynamo in 1994 to a UK
company, but somewhere in its lifetime the game had been
removed and had been replaced with a PC running M.A.M.E..
However, once the then owner moved out of his parents
house, his brother kindly stole the PC and the cab was
abandoned until I rescued it.
When I brought it home the PC was no longer present but the
monitor was,
all 15 inches of it. The first thing I would be looking to do was upgrade
that to a more respectable nineteen inch model but judging from the
original bezel around the screen though it was clear that the original
game had only contained a 15 inch monitor. While authenticity is one
thing, squinting while playing games is another so a bigger monitor
was the order of the day.
The Control Panel still contained the original controls of
the Trackball and Fire buttons, but more had been added to create
a single player three button setup along with an 8-way joystick. I would
be looking to install a two player layout with two joysticks and
four fire buttons for each player. As you?ll see from my prototype panel
I had originally planned on having just three buttons, but playing
Defender for example with three buttons is not the best
way to appreciate it so I added a fourth button to my design.
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