Why did WDC stop making this chip?

Does anyone know where I can get some?

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Bill

At times, there has sure been interest here in the '802. I don't know why they quit making it. Daryl Rictor (8BIT here) had a PCB design to use SMT parts to make an '816 module that would plug into a 6502 socket and act like an '802, but right then, the '816 became unavailable in PQFP, and the PLCC version was too big. Daryl's website is non-functional at the moment. Daryl, I hope you can restore it.

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http://WilsonMinesCo.com/ lots of 6502 resources
The "second front page" is http://wilsonminesco.com/links.html .
What's an additional VIA among friends, anyhow?

There was very little demand for the 65C802. Anything system that was scratch-designed and needed the 65C816 functionality used the 65C816. So the only other use for the '802 was as an upgrade to a 65C02 system. The last I recall that a 65C802 was available from stock was c. 1995.


The PLCC version could probably be made to work by soldering the package to the PCB instead of socketing it. The footprint would be slightly wider than a PDIP-40 package, though.

The one significant caveat is that the 65C802 functionality obfuscated the invalid address bus cycles generated by the 65C816, as well as did not emit the bank address during Ø2 low. Also, since the 65C802 was pin compatible with the WDC 65C02 (and almost pin compatible with non-WDC 65C02s) there is the matter of the SYNC output that doesn't exist with the 65C816 (VDA and VPA take SYNC's place). Any adaptation of the 65C816 to a 65C02 device has to take this into consideration.

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x86?  We ain't got no x86.  We don't NEED no stinking x86!

I don't know the reason but if they have other chips that can do the same thing, companies usually justify getting rid of products that overlap and save money by making you upgrade or make you change instead of them producing an extra product line.

Here's an archive of Daryl's page:
http://web.archive.org/web/201502180557 ... ictor.org/

Thanks, Ed. If they're archiving my site (which I hope they are), I hope they're doing it often, since I'm always making little updates. Unfortunately I can't find the '802 board on Daryl's archived site (that doesn't necessarily mean it's not there, only that I didn't look in the right place); but the forum topic where we discussed it is viewtopic.php?f=4&t=186 .

_________________
http://WilsonMinesCo.com/ lots of 6502 resources
The "second front page" is http://wilsonminesco.com/links.html .
What's an additional VIA among friends, anyhow?

Hmm, looks like there's no archive of the relevant page: http://sbc.rictor.org/support/conv.html

Sites are not archived too often on the wayback machine anymore, probably due to the sheer number of web sites out there. The front page of your site was last updated in 2014, but I got the wayback machine to re-archive it today. Most of your other pages were archived as late as April, but not all of them - I got the wayback machine to archive them today as well, unless I overlooked something (there's no way to manually get archive.org to recursively archive a site - for obvious reasons).

I've started to habitually have the wayback machine archive pages when I find something interesting, at least if I can remember to do it. Unfortunately right now the wayback machine has archived some of the error pages from Daryl's site.. it's better when sites are simply off-line instead of showing error pages.

-Tor

Just for completeness, in this diversion about web site archives, note that archive.is offers an archiving service too. It only costs a click, and it's an additional backup. (Not that these archives are meant as backups of course)
(I see a few snapshots of Garth's site: https://archive.is/wilsonminesco.com)

March 22, 2015. Every time I update a page, I put the date at the bottom.

I emailed Daryl yesterday and he was away from home and said he would check right away when he got back. At least it did not look like he accidentally let the domain expire and someone kidnapped it to hold hostage for thousands of dollars like they do.

Anyway, his '802-replacement module design was a PCB the size of a 40-pin DIP with an '816 on it in PQFP (to fit between the pin rows) and a few other logic ICs in SOIC IIRC, on both sides IIRC, very neatly done, and I suggested the Interplex pins for the edges, which are made to go into standard DIP sockets (unlike square posts). If there's enough interest and the PQFP is still not available, it could be re-done in a bulkier package with the PLCC. Obviously it will be expensive compared to everything on an IC, but still well worth it for some people.

_________________
http://WilsonMinesCo.com/ lots of 6502 resources
The "second front page" is http://wilsonminesco.com/links.html .
What's an additional VIA among friends, anyhow?

I believe this is it. Has the QFP board layout with some SMD devices. Files are for ExpressPCB.

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Regards, KM
https://github.com/floobydust

In our case, the cost would be over $14,494 so it would be interesting if we could raise it.

http://www.worthofweb.com/website-value/6502.org/

Yes, I meant that your front page had been last sampled (I shouldn't have said 'updated') by the wayback machine in 2014. So I got the wayback machine to make a new snapshot yesterday.

-Tor

Daryl's site is back up. The '802 module is at http://sbc.rictor.org/support/conv.html .

Regarding the web page that tells how much a site is worth, mentioned above: I find it laughable that it says $113 for mine. That comes out to just a few cents per hour I've put into it.

_________________
http://WilsonMinesCo.com/ lots of 6502 resources
The "second front page" is http://wilsonminesco.com/links.html .
What's an additional VIA among friends, anyhow?

I think it is based on traffic or thousands of users. Example: Put in Sparkfun, Adafruit or Hackaday and see what the results are. If you had to sell advertising, the traffic or number of ads it could generate is what your site is probably worth and it isn't based on the time you put into it. And then something weird happened. I put in Fox News and got a higher result than Abcnews so this isn't a political post but go figure. I have no idea why so I will have to figure that out because I'm sure ABC News reaches more households and has more traffic.