I saw an advert on bey (China seller) for a Rockwell 6503 IC. The 6503 is a variant of the 6502 with limited number of pins to 28, the same 6502 core with less addressing space.
But something in the advert made me wonder, a 40 pin 6503?
I ordered one and indeed a 40 pin IC appeared. So this is not a 6503!
Then I searched the internet for the 338-6503 printed on the IC and found references to it being a R65C02.
And indeed, the 6502 testers recognized it as working 65C02. Weird!

See also:
A demo of the new facilities in the KIM-1 Simulator 2.2.1
A demo of the new facilities in the KIM-1 Simulator 2.2.1
Scroll, copy paste of the console.
New versions of KIM-...
KIM-1 connectors: beware the Chinese cheap variants!
The KIM-1 needs 2 edge connectors.
The specifications are: card edge; PIN: 44; 3.96mm
When you search for those, ...
Magazines: Compute! and Compute II
The pages om Magazines had an update.
MICRO has its own page with all Best of MICRO pfds.
Compute! and Compute II ar...
All documents in the MTU pages are now clean and higher quality, about 50 new PDFs.
I got hold a about 10 cm of MTU documents. Several I already had in PDF format, some not available yet.
I took the oppo...