Re: Hardware emulation of 6509 using 6502?

From: smf <*smf_at_null.net*> Date: Sun, 25 Feb 2018 22:25:55 +0000 Message-ID: <08dd3063-dfa2-2557-cf1c-3d3545ebc142@null.net> · smf_at_null.net

On 25/02/2018 19:06, Segher Boessenkool wrote:
> On the 6510 it is the CPU register.  I'd assume 6509 is implemented
> similarly (but there are no die pictures to compare AFAIK).

When you access the execute bank then I would agree, so normal 
instructions and the zero page access of indirect instructions will 
access the IO register.

But I'm not convinced when you do an indirect access and it goes to a 
different bank.

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