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Author Topic: Failed Timekeeper or other SRAM Chip? I have the solution for you!  (Read 7128 times)

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minicooperscooter

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After my Timekeeper failed and I hacked it apart to repair it, I realized that there had to be a better way.  I went into my shop, and I developed a template and process to place an external button battery on top of the chip, wired to the internals, and 100% serviceable by YOU.  These chips typically lack any way to test, let alone service the battery inside them, if yours has failed, you'll have to hope that a NOS Timekeeper will work, and keep working for you.  How long will yours last, before you're pulling it back out and reprogramming another one?

With my chip, you'll have a fully-functional Timkeeper SRAM with an off-the-shelf CR2032 LiOn battery attached to it.  The battery holder will be permanently affixed to the chip via epoxy, and it will be wired to the internal circuit of the chip.  Never again will you have to worry if your game code is intact and operational.  With a multimeter, you'll be able to verify the chip's voltage right on the surface.  This is one clean package to make your game, or router, or old SPARC UNIX box keep rolling.

If the battery is dying or seems old enough to replace, via the same test points, users can apply 3.3 volts and keep the chip alive while they replace the battery!  Remember, even a temporary loss of that voltage and the code will be lost - these chips do not receive power to service the internal part of their clock circuit from your CPU or game power supplies!  The battery is a MUST.

My initial run will include:

* ST's M48t59Y chips and their sub-varieties
* Dallas 1225Y and other similar Dallas chips in this class
* Custom ICs on a limited basis (PM me for details)

The background around how I got here is in a thread about a Konami Silent Scope, if you're interested, found here - http://forum.arcadecontrols.com/index.php/topic,130544.msg1486270.html#msg1486270

I plan to market these chips for $50 each.  I can offer to program them as well, on a case by case basis, provided we don't violate anyone's intellectual property.

Please PM me if you're interested!
« Last Edit: January 11, 2015, 11:26:42 am by minicooperscooter »

canadiangamer

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Re: Failed Timekeeper or other SRAM Chip? I have the solution for you!
« Reply #1 on: September 12, 2015, 11:10:22 am »
Hi! I'm new to the site and it doesn't want to allow me to pm you about the timekeeper chip. Maybe after making a post it will allow it. If you read this and can pm me I'd appreciate learning more about how you can help me get a SilentScope2 running again, thanks!

PL1

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Re: Failed Timekeeper or other SRAM Chip? I have the solution for you!
« Reply #2 on: September 12, 2015, 12:34:22 pm »
Welcome aboard, Canadiangamer.   ;D

Your PMs should be enabled now.   :cheers:


Scott

canadiangamer

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Re: Failed Timekeeper or other SRAM Chip? I have the solution for you!
« Reply #3 on: September 12, 2015, 03:34:49 pm »
 :applaud: Thank-you kind sir!

lilshawn

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Re: Failed Timekeeper or other SRAM Chip? I have the solution for you!
« Reply #4 on: September 15, 2015, 03:03:08 pm »
a ready to go option is actually a really good idea.

The silent scope was a lost cause (was unable to program the chip for re-insertion to the unit) and was subsequently parted out. some of the konami machines include a dump in a rom chip to reprogram the RTC chips, but this unit lacked that chip. (likely intentionally as a kind of suicide battery)

in any case, since my post, I've too been hacking apart failed chips and adding a 2032 battery holder to them as you mention. it's quite labor intensive and you have to do it just so, otherwise you end up killing your chip. I use these chips in older NSM CD jukeboxes... and right about now is when they are starting to fail (about 15-20 years which really in the scheme of things is not bad considering)

phxbluefish

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Re: Failed Timekeeper or other SRAM Chip? I have the solution for you!
« Reply #5 on: November 02, 2015, 02:11:19 am »
Please send me a PM about my dead SS2 timekeeper. I am unable to send PMs as I am a new user.

Robert

nefasto

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Re: Failed Timekeeper or other SRAM Chip? I have the solution for you!
« Reply #6 on: November 26, 2015, 06:36:21 pm »
users can apply 3.3 volts and keep the chip alive while they replace the battery
how if battery is inside the battey holder ?
and can i see real picture ?
« Last Edit: November 27, 2015, 03:50:07 pm by nefasto »

deadpoet2002

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Re: Failed Timekeeper or other SRAM Chip? I have the solution for you!
« Reply #7 on: December 12, 2015, 07:16:56 pm »
Hi just wanting to know if minicooperscooter is doing a service where we can pay you for what is needed and sent to me via mail ??

if so how much and what is the process ????

Cheers Shane

PL1

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Re: Failed Timekeeper or other SRAM Chip? I have the solution for you!
« Reply #8 on: December 12, 2015, 08:21:18 pm »
Hi just wanting to know if minicooperscooter is doing a service where we can pay you for what is needed and sent to me via mail ??

if so how much and what is the process ????
Welcome aboard, Deadpoet2002.   ;D

As he mentioned in the OP, drop him a PM ( icon under his username) with your specific needs and any questions you have.

He was logged in yesterday.   :cheers:


Scott

deadpoet2002

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Re: Failed Timekeeper or other SRAM Chip? I have the solution for you!
« Reply #9 on: December 12, 2015, 08:35:02 pm »
Thanks Scott appreciate your help

ranchero

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Re: Failed Timekeeper or other SRAM Chip? I have the solution for you!
« Reply #10 on: April 27, 2016, 11:23:15 pm »
just wondering if i could still pm minicooperscooter or not.... don't see how i would do so

PL1

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Re: Failed Timekeeper or other SRAM Chip? I have the solution for you!
« Reply #11 on: April 28, 2016, 12:36:44 am »
just wondering if i could still pm minicooperscooter or not.... don't see how i would do so
Good news: Your PMs should be enabled now.   ;D

Bad news: OP hasn't logged in for several months.


Scott
« Last Edit: April 28, 2016, 12:39:14 am by PL1 »

Jonny802

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Re: Failed Timekeeper or other SRAM Chip? I have the solution for you!
« Reply #12 on: July 15, 2022, 07:11:58 am »
Hi, how are you?  hi, i am desperately searching for the file to reprogram the RTC chip of a konami viper thrill drive.Can you  supply the file or suggest  where to find it? have i to search a .dat file in a mame repository?
 thank you so much