Michael Pender wrote:
I recall seeing some postings on comp.sys.apple2 from around 1990 that stated that the implementation of the RDY line on the 65c02 is inconsistent with the 6502 which causes other problems. A better option might be to drop in a 65816, which more faithfully recreates the 6502 functionality (in 6502 emulation mode). - Mike
65816s are a bit on the scarce side. There are a couple of 65C02s that do work with the II+ though. The GTE and the Rockwell. Wayne