6.2 - So how do I see what the ROMs are on my machine? (Pinball Technically Speaking)
Description
This article is from the General Pinball FAQ, by Keith Johnson keefer@access.digex.net with numerous contributions by others.
6.2 - So how do I see what the ROMs are on my machine? (Pinball Technically Speaking)
Usually the only way is to power-cycle the machine. On Williams/Bally games,
the ROMs are labeled like this: P-?? means prototype (pre-production run)
ROMs, where the ?? is a number of some sort. The higher the number, the
later the ROMs. L-?? means production ROMs (again the higher the number the
later they are), and H-?? is used for custom ROMs. You have to have some
pretty good connections to get these kind. :)
For a while, Williams/Bally games used PA/LA and PX/LX. These signify
American ROMs and export ROMs (the A and the X that is). The difference is
that it is impossible without extra hardware for an American ROM game to be
set to $.25/game. Boo.
Sega games use actual ?.??-type numbers for their ROMs, as well as the date
of release.
Williams/Bally, starting with Theatre of Magic, have gone to a ?.??-type
numbering system like Sega's now.
Gottlieb games don't give any indication of ROMs whatsoever. It just tells
you how many balls should be in the game and the ROM checksum. Not very
helpful, really.
Alvin G. games display something like "AG10/R3". The best guess is that the
first number is the game number and the second number is the revision level.
-- Thanks to John Gantert <gantertj@vitro.com> for information.
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