6502.org

Welcome, Chris, and thanks for your public spirited gesture!

I'm not sure how best to arrange transferring these parts, and I'm not proposing to put myself in charge. But it might be helpful if you tell us where you're located; also where you're willing to ship, and on what terms.

Since there are a variety of chips involved, it may well be that no single individual has a use for the whole lot. Would you be willing to accommodate multiple inquires, each directed toward a certain specific chip(s)? If that's more effort than you're willing to take, I understand, but please give us an indication about that. Thanks again,

Jeff
ps- To keep this thread uncluttered, folks responding to Chris should perhaps consider doing so by PM.

Here is a list of some of the items I want to dispose of, I'm unsure whether they're worth anything (I'm open to offers) but I'd rather not bin them.

MPS6550
MPS6540 (0190479A) programmed ROM possibly for CBM64 but not sure.
MOS6532
MOS6525 A
MOS6522
MPS6504
They are 40pin plastic devices except for the 6540's (3 are ceramic) & 6504's which are 28pin of course and , the 6550 is an odd one with 22pins.

I hope these items might help people with projects or repairs.

I also have some 8088 co-processor boards that were designed to work with CBM700 or 800's I think and also disk drives and PET/CBM ieee488 cables.

I tried to donate some CBM machines to the National Museum of Computing but could not transport it there.
I may be able to post abroad but will need to check carriage.
I will let you know what else I find.

Anyone interested in any of them then please pm me. I can't promise to respond very quickly but will do my best.
Chris.

Thanks Chris. (So, that's a RAM, ROM, RIOT, CIA, VIA, and MPU. And 8088 boards, drives, cables.)
(Edit: oops, see below, that's a TIA, not a CIA - it's a three-port interface adapter.)

Thanks for the listing of the 6502 family components.Looked up the MOS6525 part in the 6502.org datasheets repository. Hadn't heard of this part before. Seems to be a very versatile part. Might be a good part to use in a new design that utilizes 6522 / 6520 devices. Doesn't have the timer function, but the interrupt prioritization function might be a useful feature.

I didn't mention quantities. I've got tubes full of these ic's but I haven't counted the quantites in each tube yet.

6550 1 tube
6540 9 tubes
6532 14 tubes
6525 5 tubes
6522 9 tubes
6504 3 tubes

So if anyone has a big project then get in touch.

Chris

I sent you a PM.

I do a lot of old computer and arcade game board repairs. The 6532 can be found in pinball games plus the Atari 2600 / 7800 game consoles plus in Fluke 9xxx series CPU pods so there's a demand for them.

Raymond

I need a 6532 to restore my old genuine AIM-65.

I also have a few tubes of NMOS 6502 and some non-WDC 65C22 that I will never find use for myself. Even a few non-WDC 6551 with working TX IRQ. Not sure if they are NMOS or CMOS. I'm an invalid and has difficulties to check right now. If there are some interest I will try to do it in a few days.

Electronics retailer Reichelt in Germany now has WDC products in stock:
https://www.reichelt.de/at/de/8-bit-mic ... d85087e2b5

A few months back (before the Big Move) I ordered some ACIAs from UTSource. UTSource is a supplier I and other forum members have had reasonably good luck ordering from in the past. This particular time I ordered some Rockwell 65C51s and some CMD G65SC51s. These, like other chips I've ordered in the past, are supposed to be used working pulls but in good condition. The Rockwell chips, to my untrained eye, look well enough, but the CMD chips have been very obviously and poorly sanded down and re-silkscreened. With all of the chaos of moving I haven't been able to test any of the chips before now; I'm just getting set up to do that. But, I was curious if there's any possibility at all that they're not fakes. Is there any legitimate reason to re-silkscreen an IC?

Other than perhaps making it easier to read the label? None that I can think of, generally speaking wouldn't be worth the effort.

And further than that - it's obviously not a hand-task. I can envisage that someone has gone to the trouble of building an industrial scale machine that grabs the ICs, perhaps in some sort of carrier, runs them under a sanding wheel/flap/whatever, and finally sends them through the silk screen printer. Doing them individually seems impractical, even if putting them in and out of the machine is a manual operation.

I am continually amazed by the ability of the human race to generate new parasites.

Neil

Yep!  It seems insane that anyone would make that sort of investment to resell nickel-and-dime parts.  Yet electronics counterfeiting continues unabated.

Speaking of counterfeits, note that silk-screened WDC devices have not been produced for nearly 20 years.  Here’s information on this that I got from David Gray at WDC:
Emphasis added.

Succinctly, if you receive a W65C02 or W65C816 that is silk-screened and has a date code newer than 0552, caveat emptor!


Without getting into any politics, it seems human parasites tend to begat more parasites, if you get my drift.

Big fleas have little fleas
Upon their backs, to bite 'em
And little fleas have lesser fleas,
And so ad infinitum...