Tron & Pole Position II battery - Dallas Question

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Tron & Pole Position II battery - Dallas Question

Hi all. I just added Dallas rams to my Tron & Pole Position II. Both are working fine, I just want to make sure I did this correctly so no issues down the road.

Tron:
Has Tom Wiz switcher adapter in it. I removed the rechargeable battery from that board and installed the Dallas Ram on the Tron CPU.

Pole Position II:
I had put in a blocking diode and lithium battery which has worked for over a year now. I simply removed the battery and swapped the 6116 with the Dallas Ram.

I am pretty sure I'm good to go. Did I miss anything?
 
FYI - If you crack that open you will find a coin cell battery inside, this is what gives it it's height....

I went with a Simtek (STK25C48) chip myself (from Mark Spaeth) in my Pole Position II and Gyruss...

Lindsey sells a 6116 NVRAM adaptor/replacement for DE Pinball games.... this may work as well, but I have not tried it... It uses a surface mount chip on a dip adapter...

Gyruss HSSK
http://arcarc.xmission.com/Web Archives/ozborn.home.netcom.com (Oct-14-2003)/TPGyrHS.html

tpgyrkit.jpg


-Mike
 
"Lithium energy source is electrically disconnected to retain freshness until power is applied for the first time."

Does this only apply to the ds1225AD/AB models?
 
batteries

I pulled the battery off the Tom Wiz board as stated in my first post. I don't want to deal with losing scores if I don't play tron a few weeks...

As for the dallas ram attached is a pic. Date looks like 13th week of 2012 right?
 

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"Lithium energy source is electrically disconnected to retain freshness until power is applied for the first time."

Does this only apply to the ds1225AD/AB models?

Doesn't really matter. That doesn't prevent the self-discharge of the cell (which is what really defines the lifetime of it in this application).
 
FYI - If you crack that open you will find a coin cell battery inside, this is what gives it it's height....

I went with a Simtek (STK25C48) chip myself (from Mark Spaeth) in my Pole Position II and Gyruss...

Lindsey sells a 6116 NVRAM adaptor/replacement for DE Pinball games.... this may work as well, but I have not tried it... It uses a surface mount chip on a dip adapter...

Gyruss HSSK
http://arcarc.xmission.com/Web Archives/ozborn.home.netcom.com (Oct-14-2003)/TPGyrHS.html

-Mike

Hey, no need to use an archive link.... My site is still alive! :D

http://www.scoresaves.com/TPGyrHS.html

The STK25C48 is going to be very hard to find.... It's probably better to use a battery-backed SRAM (like the M48Z02) in Pole Position anyway... I thought I heard those boards don't like the Simteks. But if you have it working in your PP2 that's great.
 
so far so good

Well the Dallas Rams are working well in my PPII and Tron and the manufacture dates are from this year. None of you seemed to have an issue with how I installed them so I guess they are good for the long haul.

:0)
 
As for the dallas ram attached is a pic. Date looks like 13th week of 2012 right?

That's great that you got fresh chips for that price. I'm always a bit weary of HK/China sellers.... I never would have ordered from that auction simply because the picture shows an old dirty pull rather than a new chip. Glad it worked out for you.
 
Matt, do you have an opinion on jumping Vbatt to +5 on the MCR games? I have a Spy Hunter with NVRAM and no jumper, I have an EDOT with NVRAM that does have a jumper, and I have a Tron with neither. I'll probably add the jumper to Tron when I swap the RAM, but I haven't decided if it makes any difference. I can say that since I added it to EDOT, the scores and settings have been properly retained.
 
Matt, do you have an opinion on jumping Vbatt to +5 on the MCR games? I have a Spy Hunter with NVRAM and no jumper, I have an EDOT with NVRAM that does have a jumper, and I have a Tron with neither. I'll probably add the jumper to Tron when I swap the RAM, but I haven't decided if it makes any difference. I can say that since I added it to EDOT, the scores and settings have been properly retained.

While it may not be necessary sometimes (depends on the PS voltage and the type of NVRAM), it's always a good idea. It's only going to make it more reliable. Very simple mod with no downside.
 
I bought some of those cheap ones as well for Pole Position and PP2, so hopefully they will last for a while.

There is a jumper on the Pole position boards to disconnect the battery. Probably not needed, but it can't hurt to take the empty battery section out of the circuit when using nvram.
 
To clarify, when I say Vbatt mod I'm talking about modifying the PS so that it sends a full +5V on the Vbatt line to the board. There's a nice pic of that in this post: http://forums.arcade-museum.com/showpost.php?p=2203577&postcount=70

In which case, you wouldn't want to change any board jumper that disabled the Vbatt line.

I was talking about Pole Position specifically. It has a jumper by the battery that disconnected the battery during shipping. Probably not much of a need to run +5 to vbatt on these boards. almost all running Pole Position boards have +5 going to multiple test points already. lol
 
Hey, no need to use an archive link.... My site is still alive! :D

http://www.scoresaves.com/TPGyrHS.html

The STK25C48 is going to be very hard to find.... It's probably better to use a battery-backed SRAM (like the M48Z02) in Pole Position anyway... I thought I heard those boards don't like the Simteks. But if you have it working in your PP2 that's great.

Google found the other link first... :(

My Pole Position II has been fine running the Simtek so far... The scoreboard has my initials all over it... :D

-Mike
 
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