Does anyone know if you can use the clock signal supplied to the Rockwell Φ0(in) pin (pin 37) as the system PHI2 clock as WDC recommends for systems using their W65C02 CPU? I'd like to test this on a solder-less breadboard, something similar to Ben Eater's Build a 6502 computer project, but it will take a while to wire up...

Cheerful regards, Mike

Φ0 is the same thing as Φ2 in. Φ2 out will be a bit delayed from there. So to answer your question more directly, yes, pin 37 of the DIP is the same between Rockwell and WDC.

Please see the 6502 primer though. You have various things in your schematic that could cause problems, and we want you to have the best chance at success.

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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?

Haven't had much time to spend on this but I am making progress. Only a dozen or so wires left to install.

If anyone still sees a problem with the updated schematic in the first post, would you let me know, please?

TIA... Cheerful regards, Mike

In my experience, which has recently (last couple of years) been kicked into over-drive by the best minds here, yes. Φ0 is the real clock and if you design to use Φ0 for your system clock (even into those 65XX IC's that have a Φ2 input) it will work with all 6502 variants including the latest 14+ MHz items from WDCfeeding .

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Bill