Last paragraph: "As a side note, I have designed a prototype board that allows use of a brand new 65C02 IC made by Western Digital in retro machines. The Western Digital chips have a slightly different pinout to the others, so need a slight conversion. PCBs for this are coming soon."
Thanks I have no idea how I missed that :/
But the WDC chips are made by Western Design Center, not Western Digital Corporation.
So many people get this wrong. I've seen this mistake everywhere.
Doh! That's what I get for writing with a stack of hard drives next to me. Thanks, I'll update the post.
WDC application note on that (note the pinout differences):
Another comment on this post: "I regularly get fake NXP chips even from the big distributors. Not going to name them here, but it happened at least with the ones starting with A, D and M. ..."