Hi Everyone. Good news... i just imported 1000x of MC6821P ICs, the obsolete 6821 PIA commonly found in Bally, Data East, Classic Stern, Sega, Williams, and more boards. I have tested over 100 of them so far and not a single bad one. They are used pulls. All legitimate Motorola manufactured with date codes between 1981 and 1986. These are NOT REMARKS! The legs where all straightened and got a fresh coat of solder. The plastic package on some is scuffed and worn (why they typically blacktop/remark), but the pins are all full length, straight, and clean.

Every single PIA i send out will be tested in a WMS driver board on my bench fixture. In the unlikely event of issues, i will take care of it. I will ship in antistatic tubes. Right now i am only shipping to the USA. Pay via PayPal.

If this works out, I will import more / different ICs.

1-9 = $3.00 each
10-24 = $2.75 each
25-49 = $2.50 each
50-99 = $2.25 each
100+ = $2.00 each

Shipping costs, USPS first class or priority mail at my discretion.
1-50 = $3.00 to ship
50-100 = $5.00
100+ = $7.00

Here are some pics
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Message me here for more info or how to purchase.

Thanks
Andrew

Hi Everyone,

I have about 600 PIAs left.

Thanks
Andrew

Thanks for nice feedback Zitt. RustyLizard, you have mail!

Hi Terry,

It was a gamble, but this is working out well. I am coming up with a list of obsolete ICs that would be pretty safe to reimport. Wondering if it is worthwhile to import the obsolete plasma display driver ICs like UDN6118a? or are people just going to LED displays. Taking recommendations! My source is a recycling place in China that does a good job. He does the pulls and has tons of testing equipment to verify used pulls. I have had great dealing with them for years.

Mike,

You have mail!

Thanks everyone

The 6821 is a Peripheral Interface Adapter. Basically it allows a 6800 type computer to work with external things. The PIA can read an input or drive an output. They are used to read switches, control displays, control sound boards, control solenoids, etc.

Failure of this chip does happen, i wouldn't say it is super common though unless the 6821 was manufactured by AMI, that brand fails more often.

Contemplating trying this with 6802 and 6800 CPUs as well. My concern is the CPU is pretty darn reliable compared to the 6821 PIA. Might be hard to sell 1000 of them.

SRAMs are tempting to get as well, but so many variables on types i need to be careful. Plus extra static sensitive Hrmm.

EPROMs are a good idea too, but i would need a ton of time and effort to test them all. If i could sell 2732 and 2716 EPROMs for $2 each, is that price competitive?

After dealing with my guy for a while, I fell confident he won't screw me, and if he does, have at least two lines of protection to try and get my money back.

I have tested about 700 PIAs so far and I have found three bad ones.... pretty damn good!

I am getting PCD5101P, MC6802, HI55564, LH5116-70, UDN7180A and HY6464ALP-70 on the next run. Look for a small website with just a listing of what i have available coming soon.

.

I doubt it. He salvages stuff off of recycled consumer/commercial/industrial electronics.... Basically when we send shit to china to "recycle" he is one of the people that parts them out and sells components back to us. I wouldnt think any of these PIAs i have where originally in a piece of coin op equipment.

I still have some PIAs left.

Hi everyone

I have sent out over 800 MC6821P PIAs and still have a some left. Message me for info. I also have 150uF 350v 105c radial electrolytic capacitors that is a good replacement for the c26 high voltage filter on a Bally or Stern driver board.

Andrew

I recently sold through 100x 15,000uF(close enough to 12k) filter caps. I will try and source out more.

Axial is available but at a premium price. Radial ones mount in okay in all situations i have encountered. How much is axial worth over radial to the pinballer? The $2-3 premium? To me no... but i'm a tight ass compared to many which I respect.

Thanks!

PCD5101P coming on Tuesday. As long as they test okay, i should be able to offer them at good price.

I have stocked PIAs again, possible for the last time. HD6821P and have some HD68B21 if you need the 2MHz version.

http://nvram.weebly.com

PIA's are now gone. The source I trusted for bulk 6821 / 6802 parts is sold out (forever)? It was a good run over the last few years. Sold many thousand that I am sure that helped a lot of games get fixed. Anything I have left I have to hoard for my own boards i'm making.

The PIAs where coming out industrial / retail gear like cash registers, copiers, computer terminals etc from the 80s and 90s. Not many vector monitor parts coming out that kind of recycled gear. I would see the monitor controllers mixed in accidentally sometimes with the PIAs and CPUs. MC6845??

Saddly today's "E Waste" that these where pulled from does not contain many old school parts anymore. The 680x series stuff had a good run tho. You can still find the PIAs on eBay / AliExpress with moderately good success rates, but they are not something I would import to try and resell.