While digging through ancient layers of papers and stuff I came across something I apparently copied in the early eighties - two pages of instructions and various information about the 6502.
It looks like the original may have been a double-sided plastic page, with a format not completely compatible with the copy machine I used (the copy seems to be half a letter short on one side).
Just a curiosity, in any case.
Attached.

That's nice!

I see you have Revision B - I found a Revision A online. I wonder what the differences are. I did see one bug, which is in both...
ftp://ftp.apple.asimov.net/pub/apple_II ... 20Card.pdf

Edit: oops, what I thought was a mistake wasn't there.

Thanks Ed!
That Revision A copy is better than mine - I'll compare it to my paper copy, which may be a little bit better than the scan I did.

I do like that kind of handy reference, although I don't believe I ever had one.

Edit: for future reference, a collection of single page ASCII reference cards appears here.

What's the mistake then Ed?

Here's a clue...
... oops, horror, there's no mistake there on the ref card! It's my mistake. Pride comes before a fall. Unless I can quickly find a real one...

Edit: could I claim that the B flag needs a heavy footnote, and isn't affected by PLP or RTI?

Here's a better copy of Rev B:
https://github.com/jefftranter/6502/blob/master/docs/6502refcard.pdf
and another
http://seriouscomputerist.atariverse.com/media/pdf/book/6502%20(65xx)%20Instant%20Reference%20Card.pdf