TECH: WPC Pinball ROM Chips and Speeds????

[Sojourner353]

Hi all,

Just a query about ROM Chips that are used in WPC Machines, I need to
purchase a M27C2001 for my Addams to be able to upgrade to Gold function and
play.

I have noticed the Eprom Chips come in all different speeds on the net
and all my machines have ST Chips fitted that all have -12F1 on the end of
the model number that denotes its a 120ns Chip, I contacted a Semiconductor
Seller near me and he has ST M27C2001 Chips in stock however the ones he has
have different -xxxx at the end of the model number so I am wondering if
these numbers on the end of the chips make any difference or can any speed
M27C2001 Chip be used? Just want to know before I purchase a chip with a
different number.

I have also noticed when I click on the data sheets of all the different
M27C2001 chips I have seen they all seem to point to the same data sheet.

Thanks in advance for the help.

Regards,

Kevin

[John Wart, jr]

For the purpose of WPC era pins, chips that are 150ns (-15) or faster should
be fine for anything.

Most WPC games I've owned did have 120ns chips in them (-12) from the
factory, but 150ns seems to be fast enough from my experiences. Good to
know, too, as 150ns are substantially cheaper than 120ns.

--
http://www.myhomegameroom.com

"Sojourner353" <sojour...@yahoo.com.au> wrote in message
news:4549aa2a$1...@news.comindico.com.au...