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Author Topic: BAZOOKA pop-corn party  (Read 4147 times)

vernimark

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BAZOOKA pop-corn party
« on: October 22, 2012, 08:06:35 AM »
Hi all,
I was repairing BAZOOKA PCB, some final issues because 90% of the game was working.
THen I did a test saturday night before an appointment with my girlfriend. Probably an "upside-down" desire passed through my mind and I plugged that PCB in the wrong way connecting 36vac directly on TTLs
I could see chips exploding like pop corns haha

afret 2 very long days I changed more or less 50% of all chips on board!!

anyway I need your help because this game needs 74189 RAMs and I don't know where to find them.

On ebay I bought 74189 from TELEC without any speification and they sent me 74LS189AN and not 75LS189N. It seems these models are not ompatible.

just for testing I'm using now 7489 bcause I can see this RAMs have the same pinout but some signals are loo low...

do you know why N and AN are not compatible?
do you know where to buy 74LS189N rams?

regards
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Love

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Re: BAZOOKA pop-corn party
« Reply #1 on: October 22, 2012, 02:56:46 PM »
Do you have a pic of the Bazooka game? I bought one in the US from PSE and wonder if its the same.

(Cant help with the hardware issue though, sorry.
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vernimark

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Re: BAZOOKA pop-corn party
« Reply #2 on: October 22, 2012, 04:24:04 PM »
my bazooka is a bootleg. One board with a small sound board, soon pictures
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Love

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Re: BAZOOKA pop-corn party
« Reply #3 on: October 23, 2012, 01:34:49 AM »
Got the following answer from Twisty Arcade when asking for the rams you need.

"I have 74S189 and 7489 which are both compatible. "
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vernimark

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Re: BAZOOKA pop-corn party
« Reply #4 on: October 24, 2012, 06:09:52 PM »
Quote from: Love on October 23, 2012, 01:34:49 AM
Got the following answer from Twisty Arcade when asking for the rams you need.

"I have 74S189 and 7489 which are both compatible. "

mmm... 7489 are not 3state but I don't know which kind of side effects can produce...


Twisty Arcade web site seems to be not available at the moment.
 

I could find them at www.jameco.com

not so cheap...

vernimark
« Last Edit: October 25, 2012, 02:16:47 AM by vernimark »
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Love

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Re: BAZOOKA pop-corn party
« Reply #5 on: October 25, 2012, 02:30:27 AM »
Its this website. Just email the guy for advice.

http://www.twistywristarcade.com/
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vernimark

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Re: BAZOOKA pop-corn party
« Reply #6 on: October 25, 2012, 05:28:32 AM »
twisty: 3.78usd for each 7489

jameco 2.75usd for each 74189N

I think I'll use this second option.
Thank you anyway for the info, I didn't know www.twistywristarcade.com, very interesting!

vernimark
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